PSEB 7th Class Physical Education Solutions Chapter 5 Yoga

Punjab State Board PSEB 7th Class Physical Education Book Solutions Chapter 5 Yoga Textbook Exercise Questions and Answers.

PSEB Solutions for Class 7 Physical Education Chapter 5 Yoga

Physical Education Guide for Class 7 PSEB Yoga Textbook Questions and Answers

Question 1.
What do you mean by Yoga?
Answer:
The objective of Yoga is unity, union and love. In simple words we can say that yoga means the union of man and God. Science that unites man & God is called Science of Yoga.

PSEB 7th Class Physical Education Solutions Chapter 5 Yoga

Question 2.
What is Yoga according to Rishi Patanjali?
Answer:
To control the insticts of our mind’s called Yoga.

Question 3.
Write any one definition of Yoga.
Answer:
Yoga is that path which leads a human being from darkness to light.

Question 4.
What do you mean by the word Asanas?
Answer:
Asana is an old method of Yoga which makes the base of Pranayam, Dhyan & Smadhi. Asana word means art of sitting. According to scripture Yoga Sutra written by Patanjali Asana is that situation of a person in which he can sit maximum for time comfortably.

Question 5.
How many types are there of Asanas? Write in detail.
Answer:

  1. Cultural Asana: Asana which performed to strengthen body are called cultural Asana.
  2. Meditative Asana: These type of asana is used to the smadhi or meditation.
  3. Relaxative Asana: These asanas are done in lying position. The objective of this asana is give relaxation to the body.

PSEB 7th Class Physical Education Solutions Chapter 5 Yoga

Question 6.
Yoga is only a method of treatment. Write your views regarding this statement.
Answer:
Many diseases are possible to treat with the help of Yoga. Some People assume that Yoga is a method of a treatment & meant for only these people who are suffering from any disease. Yoga can be done by any healthy person & he can save his body from any disease.

Question 7.
What is Objective of Yoga?
Answer:
Objective of Yoga is to unite love & affection with each other. With the help of Yoga we can control our mind.

PSEB 7th Class Physical Education Guide Yoga Important Questions and Answers

Multiple Choice Questions

Question 1.
How many types are there of Asanas?
(A) Three
(B) Two
(C) One
(D) None.
Answer:
(A) Three

PSEB 7th Class Physical Education Solutions Chapter 5 Yoga

Question 2.
What do you mean by Yoga?
(A) Adding
(B) Union
(C) Union of Man with God
(D) All the above.
Answer:
(D) All the above.

Question 3.
Principle of Yoga.
(A) While doing Asana we should take care of sex and age
(B) Do not exert much force while doing Asanae
(C) Aaanas should be done empty stomach
(D) All the above.
Answer:
(D) All the above.

Question 4.
Misconceptions of Yoga
(A) Yoga is related to a particular sect
(B) The yoga is meant for men
(C) The Yoga is only for sick person
(D) All the above
Answer:
(D) All the above

PSEB 7th Class Physical Education Solutions Chapter 5 Yoga

Very Short Answer Type Questions

Question 1.
Write about Yoga in detail.
Answer:
Yoga word derived from Sanskrit word Yoga which means unite the soul with God.

Question 2.
Write any definition of Yoga.
Answer:
Yoga is that path which leads a human from darkness of light

Question 3.
Write any one misconception of Yoga.
Answer:
It is related with particular religion.

Question 4.
What is asana?
Answer:
Asana La that situation of a person in which he can sit maximum for time comfortably.

Short Answer Type Question

Question 1.
Write any three principles of Asana.
Answer:

  • Do not exert much force while doing Asana. Body should, be in static & comfortable position.
  • Asanas should be done empty stomach or four hours after taking meals.
  • Heart Patients & pregnant ladies do not do difficult asanas.

PSEB 7th Class Physical Education Solutions Chapter 5 Yoga

Long Answer Type Questions

Question 1.
Write the misconceptions of Yoga?
Answer:
1. The Yoga is related to a particular Sect:
Yoga was started in India by hermits. Many people consider that Yoga is related to Hindu religion & they consider that Yoga is meant for Hindus Only.

2. That Yoga is meant for men:
Many people consider that people doing Yoga, have to follow strict rules. Hence, it can be done by men only. It is meant for women.

3. That Yoga is’only for sick person:
Many diseases are possible to treat with the help of Yoga. Some people assume that Yoga is a method of treatment & meant for only those people who are suffering from diseases.

Question 2.
Write principles of Asanas.
Answer:

  • Asana should be done empty stomach or four hours after meals.
  • Heart Patients & pregnant women should not do difficult Asanas.
  • Body should be bent slowly while doing asana. Do not give Jerks while doing asanas.
  • Do not exert much force while doing asanas.
  • The place for doing the practice of asanas should be clean & peaceful.

PSEB 7th Class Computer Solutions Chapter 5 Microsoft Word (Part-III)

Punjab State Board PSEB 7th Class Computer Science Book Solutions Chapter 5 Microsoft Word (Part-III) Textbook Exercise Questions and Answers.

PSEB Solutions for Class 7 Computer Science Chapter 5 Microsoft Word (Part-III)

Computer Guide for Class 7 PSEB Microsoft Word (Part-III) Textbook Questions and Answers

1. Fill in the Blanks

Question 1.
After selecting the picture tab appears.
(a) Format
(b) Page Layout
(c) insert
(d) View.
Answer:
(a) Format

Question 2.
For text wrapping, we can use option.
(a) Square
(b) Tight
(c) Behind Text
(d) All of these.
Answer:
(d) All of these.

PSEB 7th Class Computer Solutions Chapter 5 Microsoft Word (Part-III)

Question 3.
To remove any unwanted parts of picture, option s used.
(a) Crop
(b) Rotate
(c) Group
(d) Compress.
Answer:
(a) Crop

Question 4.
Which of the following option is not available in the Adjust group of Format tab?
(a) Corrections
(6) Artistic Effects
(c) Remove Background
(d) Picture Styles.
Answer:
(d) Picture Styles.

Question 5.
We can find the number of words in the bar at the bottom of the window.
(a) Task Bar
(b) Status Bar
(c) Title Bar
(d) Scroll Bar.
Answer:
(b) Status Bar

PSEB 7th Class Computer Solutions Chapter 5 Microsoft Word (Part-III)

2. Very Short Answer Type Questions

Question 1.
Which option splits the text into two or more Columns?
Answer:
The Columns option from the Page Setup group in the format tab divides the text into two or more sections.

Question 2.
Which page orientation sets the page in horizontal direction?
Answer:
Landscape Orientation.

Question 3.
Which option is used to group two or more images together so that they can be treated as a single object?
Answer:
Two or more images can be grouped together as one object using the Group command from the Arrange group in the Layout tab.

PSEB 7th Class Computer Solutions Chapter 5 Microsoft Word (Part-III)

Question 4.
Which option can be used to change the colors of the picture in MS Word?
Answer:
From the Picture Format tab, the color of the picture can be changed with the Color option from the Adjust group.

Question 5.
Which option is used to count words in MS Word?
Answer:
Words can be counted using the Word Count option from the Proofing group in the Review tab or the Word Count Dialog box from the Status bar.

3. Short Answer Type Questions

Question 1.
What are Margins?
Answer:
A margin is the space between the text and the edge of the page. By default, a new document’s margins are set to Normal, which means it has a one-inch space between the text and each edge. Depending on your needs, Word allows you to change your document’s margin size.

PSEB 7th Class Computer Solutions Chapter 5 Microsoft Word (Part-III)

Question 2.
What do you mean by Compress Picture?
Answer:
With this button the image can be compressed. To reduce the size of documents, pictures can be reduced in storage size. You can change the resolution of an image or delete a cropped part of an image.

Question 3.
Write about Reset Picture.
Answer:
If you want to remove all formatting changes to a picture in the document, “Reset Picture’ command will be used. This button is used to undo all formatting changes made to the picture and restore it to its original format.

  • Select the picture.
  • in the Format tab, click on the Reset picture option from the Adjust group.

Question 4.
What is Crop option?
Answer:
Crop button is used to delete the unwanted part of an image. When you crop an image, an unselected part of the picture is removed. Steps to crop the image are as follows:

  • Select the image you want to crop. The Format tab appears.
  • On the Format tab, click the Crop command.
  • Black handles will appear around the image. Click, hold and drag a handle to crop the image.
  • Click the Crop command again. The image will be cropped.

PSEB 7th Class Computer Solutions Chapter 5 Microsoft Word (Part-III)

Question 5.
Give the name of two page orientation in MS Word.
Answer:
To change the position of a document from a portrait to a landscape, click this button. To change the position of the page, steps are as follows:

  • Select the Page Layout tab.
  • in the Page Setup group, click on the “Orientation” command.
  • Click “Portrait” or “Landscape” to change the position of the page. Landscape format means the page is horizontal, while portrait format means it is vertical.

Question 6.
Write the name of various options available in the adjust group of Picture Tools Format tab.
Answer:
Correction, Picture Color, Artistic Effect, Compress Picture, Change Picture, Reset Picture, Remove Background.

4. Long Answer Type Questions

Question 1.
What is Watermark? Write steps to add watermark in a word document.
Answer:
Watermark: it is just like a stamp. it is used for confidential documents. A watermark is an image that appears blurred behind the text on a page. The steps to add a watermark to the document are given ahead:

  • Open the document to which you want to include the water-mark.
  • Click the Page Layout tab and then click the “Watermark” button to display a list of standard watermark options.
  • You can select any available standard watermark by clicking on it. This will apply to all pages of the document.

PSEB 7th Class Computer Solutions Chapter 5 Microsoft Word (Part-III)

Question 2.
Write the steps to run a Spelling and Grammar Check.
Answer:
To do Spelling and Grammar check, steps are as follows:

  • From the Review tab, click the Spelling & Grammar command.
  • The Spelling and Grammar dialog box will appear.
  • This dialog box offer one or more suggestions for spellings and grammatical errors.
  • You can select a suggestion and click “Change” to correct the error.

Question 3.
Explain the steps to Print a Document.
Answer:
Once you’ve created your document, you may want to print it to view and share your work offline. it’s easy to preview and print a document in Word using the Print option.

  • On the File tab or Office button, click Print command.
  • A print dialog box will appear.
  • In the “Name” drop-down list select the name of you printer.
  • In the “Copies” box, enter the number of copies you want.
  • In “Page Range” option select “All” option if you want to print all pages of your document.
  • If you want particular page to print then click “Pages” radio button and type page number in the box.
  • Now click “Print” option. Your document will be print.

PSEB 7th Class Computer Guide Microsoft Word (Part-III) Important Questions and Answers

1. Fill in the Blanks

Question 1.
The text of the paragraph is selected by pressing the arrow keys and the ………….. key together.
(a) Special
(b) Shift
(c) Number
(d) Function.
Answer:
(b) Shift

PSEB 7th Class Computer Solutions Chapter 5 Microsoft Word (Part-III)

Question 2.
The default line spacing is …………… point.
(a) Single
(b) Double
(c) Triple
(d) Four.
Answer:
(a) Single

Question 3.
The fill color option is used to color in ………………… .
(a) Text
(b) Line
(c) Shape
(d) Word.
Answer:
(c) Shape

Question 4.
For border and shading …………… menu is used.
(a) File
(b) Edit
(c) Format
(d) Home.
Answer:
(c) Format

Question 5.
Auto Shapes are submitted from the …………….. tool bar.
(a) Shapes
(b) Home
(c) Word
(d) Drawing.
Answer:
(d) Drawing.

PSEB 7th Class Computer Solutions Chapter 5 Microsoft Word (Part-III)

2. True/False

1. The left mouse button is clicked three times to select the entire paragraph.
Answer:
True.

2. By default paragraph text is right aligned.
Answer:
False

3. indentation command is used for shading.
Answer:
False

4. To fill ClipArt, Click insert Picture then click ClipArt command.
Answer:
True.

5. Arial and Times New Roman are the names of the fonts.
Answer:
True.

PSEB 7th Class Computer Solutions Chapter 5 Microsoft Word (Part-III)

3. Match the Columns

Column A Column B
1. Ctrl + B (a) For double line spacing
2. Ctrl + E (b) For bold the text
3. Ctrl+ 2 (c) For Left, Right, Center, Justify
4. Font style (d) For Center Alignment
5. Alignment (e) Bold, Italic, Underline

Answer:

Column A Column B
1. Ctrl + B (b) For bold the text
2. Ctrl + E (d) For Center Alignment
3. Ctrl+ 2 (a) For double line spacing
4. Font style (e) Bold, Italic, Underline
5. Alignment (c) For Left, Right, Center, Justify

PSEB 7th Class Computer Solutions Chapter 5 Microsoft Word (Part-III)

4. Short Answer Type Questions

Question 1.
What is Picture Border?
Answer:
Picture border means the line around a picture.

Question 2.
What is picture position?
Answer:
Picture position means where the picture is located into the document.

Question 3.
What are the various options available in page layout tab?
Answer:
The Page Layout tab has more than one Page layout and Formatting options. This affects the look of a page’s content. Depending on how we want to present our document, we can choose Page Orientation, Paper Segment and Page Margin commands.

PSEB 7th Class Computer Solutions Chapter 5 Microsoft Word (Part-III)

Question 4.
Write steps for formatting page margins.
Answer:

  • Click on the Page layout tab.
  • Click on the Margins command from page setup group. A drop-down menu will appear. By default “Normal” margin will be selected.
  • Click on the Predefined margin as you want.

Question 5.
Describe the steps for using custom margin.
Answer:

  • Click on Margin command from the Page Layout tab.
  • A drop-down menu will appear. From this menu click “custom margin” option.
  • A Page Setup dialog box will appear.
  • Adjust the margin size for each side of the page, and click Ok.

Question 6.
What is Orientation?
Answer:
To change the position of a document from a portrait to a landscape, click this button. To change the position of the page, steps are as follows:

  • Select the Page Layout tab.
  • in the Page Setup group, click on the “Orientation” command.
  • Click “Portrait” or “Landscape” to change the position of the page. Landscape format means the page is horizontal, while portrait format means it is vertical.

PSEB 7th Class Computer Solutions Chapter 5 Microsoft Word (Part-III)

Question 7.
What are the steps to change the paper size?
Answer:

  • Select Page Layout.
  • Click on the Page-Size command and a drop-down menu will appear. The current page size will be highlighted.
  • Click on the Size option as per your requirement. The page size of the document will change.

Question 8.
What does the column option do?
Answer:
This option splits the written text into two or more columns.

5. Long Answer Type Questions

Question 1.
What are corrections? How are they used?
Answer:
Adjust Group:
You do not need to use additional picture editing software to create high quality images for your document. Instead, you can use Adjust tools to correct and improve your photos.
1. Select photo.
2. In the Format tab, click on the Correction option from the Adjust group. A drop-down menu will now open. From this menu, select 3. Sharpen/Soften and Brightness/ Contrast settings according to your needs.
PSEB 7th Class Computer Solutions Chapter 5 Microsoft Word (Part-III) 1
To make these settings more detailed, go to Picture Format>> Corrections>> “Picture Corrections Options” option. The Format Picture sidebar appears. This allows you to provide special settings for Sharpness, Brightness and Contrast.

PSEB 7th Class Computer Solutions Chapter 5 Microsoft Word (Part-III)

Question 2.
Write the steps for using the color option.
Answer:
Picture Color:
Microsoft Word allows you to control the color and tone of your picture and you can repaint the whole picture for special effects.
Steps to change the picture color are as follows:
(a) Select picture.

(b) In the Format tab, click on the Color option from the Adjust group. A drop-down menu will open.

(c) In this menu there are 3 options:

  • Color Saturation: This controls how bright the colors are in the image.
  • Color Tone: This controls the temperature of the color, from cool to warm.
  • Recolor ; This controls the overall color of the image. Use this option to make the image black and white or gray scale, or to colorize it with a different color.

(d) Choose any of the options as per your need.
PSEB 7th Class Computer Solutions Chapter 5 Microsoft Word (Part-III) 2

Question 3.
Write the steps for compressing a picture.
Answer:
Compress Picture: With this button the image can be compressed. To reduce the size of documents, pictures can be reduced in storage size. You can change the resolution of an image or delete a cropped part of an image. The steps to compress a picture are given below:

  • Select the picture.
  • In the Format tab, click on the Compress picture option from the Adjust group.
  • Now a Compression Settings dialog box will open.
    PSEB 7th Class Computer Solutions Chapter 5 Microsoft Word (Part-III) 3
  • If you want to print the picture, click on the Print (220 ppi) option.
  • If you want to reduce the size of the file to e-mail, click on the E-mail (96 ppi) option.
  • If you want to upload the file to a web page or projector, click on Project Options.

PSEB 7th Class Computer Solutions Chapter 5 Microsoft Word (Part-III)

Question 4.
Write the steps to remove the background of the picture.
Answer:
Remove Background:
This option is used to automatically remove unwanted parts of an image. Areas to remove or keep can be marked in the picture. Following are the steps to remove the background of a photo:

(a) Select the image from which you want to remove the background.

(b) Click the “Remove Background” option from the Adjust group in the Format tab.

(c)Now the default background area will be marked with magenta color, while the foreground will remain its natural color.
(d)If the default area isn’t correct, go to Background Removal > Picture Tools and do one or both of the following:

  • If parts of the picture that you want to keep are magenta, select
  • “Mark Areas to Keep” option and use the drawing pencil to mark the areas on the picture that you want to keep.
  • To remove more parts of the picture, select Mark Areas to
  • Remove option and use the drawing pencil to mark those areas

When you’re done, select “Keep Changes” or “Discard All Changes”.
PSEB 7th Class Computer Solutions Chapter 5 Microsoft Word (Part-III) 4

PSEB 7th Class Computer Solutions Chapter 5 Microsoft Word (Part-III)

Question 5.
Write down the steps to apply a picture style.
Answer:
Picture Style Group:
Picture Styles Gallery offers many preset styles that make it easy for you to add borders and special effects with one click.
1. Picture Style Gallery:
This field provides a list of different formats that can be applied to an image. To see what each style will do, just move the mouse pointer over each style. To apply the style on a picture steps are as follows:
(a) Select the photo whose style you want to change.
(b) On the Format tab, in the Picture Styles group, click any style you like.
PSEB 7th Class Computer Solutions Chapter 5 Microsoft Word (Part-III) 5

2. Picture Border:
Use this command to change the color, width, or line style of the border of the image. Steps to add border as follows:

  • Select the image to which you want to add a border.
  • On the Picture Format tab, in the Picture Styles gallery, select Picture Border command. A drop-down menu will appear.
  • From this menu select color for border line.
  • Select weight (thickness) of boarder line.
  • Select whether the line of the border is dashed.

3. Picture Effects:
Click this button to add visual effects to the picture such as shadows, 3-D effects, and glows. Steps to add an effect to a picture are as follows:

  • Select the picture for which you want to add or change an effect.
  • Under the Format tab, in the Picture Styles group, click Picture Effects command.
  • A drop-down list will appear. From this menu select appropriate effect for image.

Question 6.
Write the steps of wrapping text.
Answer:
Text Wrapping:
This feature is used to apply wrapping to an image. When wrapping is applied, text can be typed around the image. Make it easy to move images from one place to another in a document. To apply the text wrapping on the image follow these steps:
(a) Select the image which you want to apply wrapping.
(b) From the Picture Tools tab, in the Arrange group, click on the “Text Wrapping” option.
Do one of the following:

  • Click “Square” command to type the text around the border of your picture.
  • Click ‘Tight” command to type text around a clip art image or an irregularly shaped image.
  • Click “Behind Text” command to display the text on the image.
  • Click “In Front of Text” command to display the image on the text.
  • Click “Top and Bottom” command to place the image on your line.
  • Click “More Layout Options” command for more layout Options.

From this dialog box, specify the distance between the text and the image.
PSEB 7th Class Computer Solutions Chapter 5 Microsoft Word (Part-III) 6

PSEB 7th Class Computer Solutions Chapter 5 Microsoft Word (Part-III)

Question 7.
Write the steps for adding background color or texture.
Answer:
Page Color:
With the help of this option we can apply different colors, textures and pictures to the background of the page in our document. Steps to add background color or texture are as follows:

  • Click on “Page color” command in the Page Background group from the Page Layout tab.
  • A drop-down menu will appear.
  • Choose one of the following options from this drop-down menu:
  • To apply the background color click any color from “Theme Colors or Standard Colors”.
  • To apply the texture, Gradient, pattern and pictures into the background, click “Fill Effects” option.
  • A Fill Effect dialog Box will appear. Select appropriate design for you background.

PSEB 7th Class Science Solutions Chapter 18 Wastewater Story

Punjab State Board PSEB 7th Class Science Book Solutions Chapter 18 Wastewater Story Textbook Exercise Questions and Answers.

PSEB Solutions for Class 7 Science Chapter 18 Wastewater Story

Science Guide for Class 7 PSEB Wastewater Story Intext Questions and Answers

Think and Answer (Textbook Page No. 224)

Question 1.
What is the difference in colour of contaminated and clean water ?
Answer:
Clear water is colourless, but it may contain soluble impurities and microorganisms. This water is not pure and not drinkable.
Contaminated water in which microorganisms are present can also be colourless. Also, if there is any pigment or impurities in the water, it may be dark brown in colour.

Question 2.
Name any two organic contaminants present in drain water.
Answer:
Organic pollutants present in the drain waste water are:

    1. Insecticides,
    2. Diuretics,
    3. Fruits and vegetables waste,
    4. Human and animal excreta.

Think and Answer (Textbook Page No. 225)

Question 1.
Why are manholes builts in sewage route ?
Answer:
Manholes are made at every 50-60 m distance of the sewerage system or at the junction of two sewage discharges, so that the person can enter the sewage drain to identify and diagnose the problem.

PSEB 7th Class Science Solutions Chapter 18 Wastewater Story

Question 2.
Name any two organisms living in and around an open drain.
Answer:

  1. Cockroach and
  2. scorpion.

Think and Answer (Textbook Page No. 228)

Question 1.
What change do in you notice in the appearance of liquid after aeration ?
Answer:
The color of the liquid is slightly clear and light.

Question 2.
What was removed by the sand filter ?
Answer:
Insoluble solid particles were separated by sand filter.

PSEB 7th Class Science Guide Wastewater Story Textbook Questions and Answers

1. Fill in the Blanks:

(i) ……………….. are dissolved and suspended solid impurities present in sewage.
Answer:
Pollutants

(ii) The activated sludge is about ……………….. water.
Answer:
97%

(iii) …………………. is the solid material settled at the bottom of water clarifier.
Answer:
Sludge

(iv) ……………… is the place where contaminants are removed from wastewater.
Answer:
Water purification tank

PSEB 7th Class Science Solutions Chapter 18 Wastewater Story

(v) Adopt ……………….. sanitation practices.
Answer:
Good

2. State True or False:

(i) The sight and smell of open drain is attractive.
Answer:
False

(ii) Throw plastic bags in the drain.
Answer:
False

(iii) Open drain is the breeding place for flies and mosquitoes.
Answer:
True

(iv) Do not defecate in the open.
Answer:
True

(v) Solid food remains can block the drains.
Answer:
True

3. Match the Column ‘A’ with Column ‘B’:

Column ‘A’ Column ‘B’
(i) Organic impurities (a) Sewage treatment
(ii) Inorganic impurities (b) Typhoid
(iii) Wastewater treatment (c) Manure
(iv) Water borne diseases (d) Nitrate and phosphates
(v) Dried sludge (e) Human wastes

Answer:

Column ‘A’ Column ‘B’
(i) Organic impurities (e) Human wastes
(ii) Inorganic impurities (d) Nitrate and phosphates
(iii) Wastewater treatment (a) Sewage treatment
(iv) Water borne diseases (b) Typhoid
(v) Dried sludge (c) Manure

PSEB 7th Class Science Solutions Chapter 18 Wastewater Story

4. Choose the Correct Answer

Question (i)
Wastewater treatment plant involve:
(a) Bar screen
(b) Water clarifier
(c) Grit and sand removal tank
(d) All of these.
Answer:
(d) All of these.

Question (ii)
Name the by-product of wastewater treatment plant:
(a) Biogas.
(b) Sludge
(c) Both (a) and (b)
(d) None of these.
Answer:
(c) Both (a) and (b).

Question (iii)
Which of the following chemicals is used to disinfect water ?
(a) Chlorine
(b) Ozone
(c) Both (a) and (b)
(d) None of these.
Answer:
(c) Both (a) and (b).

Question (iv)
World Toilet Day is celebrated every year on:
(a) 29 November
(b) 19 October
(c) 19 November
(d) 29 October.
Answer:
(c) 19 November.

Question (v)
Which of the following is not a low cost onsite sewage disposal system
(a) Septic tank
(b) Compost pit
(c) Chemical toilets
(d) Bar screen.
Answer:
(d) Bar screen.

5. Very Short Answer Type Questions:

Question (i)
What is sewage ?
Answer:
Sewage.
This is the dirty water which contains soluble impurities dissolved and insoluble suspended impurities. It is produced by homes, offices, industries, farms and hospitals.

PSEB 7th Class Science Solutions Chapter 18 Wastewater Story

Question (ii)
What is Sludge ?
Answer:
Sludge.
The solid that settles at the bottom of a water purification tank is called Sludge.

PSEB 7th Class Science Solutions Chapter 18 Wastewater Story

Question (iii)
What is clarified water ?
Answer:
Clarified Water (Pure water).
It is colourless, odourless and tasteless water with pH value 7. Rainwater is pure water. The boiling point of pure water is 100°C. Pure water does not contain soluble or hanging impurities in it.

Question (iv)
What is septic tank ?
Answer:
PSEB 7th Class Science Solutions Chapter 18 Wastewater Story 1
Septic Tank.
This is a low cost onsite sewage treatment system that contains anaerobic bacterial enivironment to decompose the waste products. It has connection to main sewage discharge pipes. This is used in which excreta from the toilet passes through the covered pipes from the toilets directly to the biogas plant.

Question (v)
What is waste water treatment plant ?
Answer:
Waste Water Treatment Plant.
Polluted water of houses through covered underground Pipes is taken to sewage removing contaminants.

The water is taken to the treatment plant and after the treatment this water is discharged into the rivers or oceans. The remaining waste water is sent to the place where the impurities are separated from it. Separation of contaminants from waste, water is called water purification. Water treatment involves physical, chemical and biological processes which remove contaminants from the waste water. Waste water treatment plant is also called sewage treatment plant.

6. Short Answer Type Questions:

Question (i)
Why oil and fats should not be thrown in the drain ?
Answer:
PSEB 7th Class Science Solutions Chapter 18 Wastewater Story 2
Oil, ghee etc. should not be thrown in the drain, instead leftover should be put in the dustbin.
Because they harden and block the drainage pipes. If thrown in the open then they can close pores iin the soil which may reduce the ability of the soil to filter water.

Question (ii)
What is the function of bar screens in a wastewater treatment plants ?
Answer:
Function of Bar screen in waste water treatment Plants:
PSEB 7th Class Science Solutions Chapter 18 Wastewater Story 3
In waste water treatment plant at first this water which contains solid insoluble impurities such as cans, pieces of nepkins and plastic etc is first passed through a mesh having bar screens where these impurities are stopped and separated.

PSEB 7th Class Science Solutions Chapter 18 Wastewater Story

Question (iii)
“Throw litter in the dustbin only
Answer:
Always throw the garbage in the dustbin because scattering the garbage will not only pollute our surroundings but will also pollute the environment and give off a foul smell which will help in producing germs, insects and cockroaches. It will also cause many diseases. So throw litter only in the dustbin.

Question (iv)
What are the alternative arrangements for sewage disposal ?
Answer:
Alternative arrangements for sewage disposal.
Where there is no sewerage system, low cost sewage disposal systems such as septic tanks, chemical tanks, composting pits etc. can be constructed. A septic tank is a small sewage treatment system that contains anaerobic bacterial environment that separate waste pollutants. It has no connection with main sewage disposal pipes.

Question (v)
Why is it harmful to discharge untreated sewage in water bodies ?
Answer:
Untreated sewage contains inorganic and suspended contaminants. If this untreated sewage is discharged directly into water bodies then contaminants like germs present in it will get activated which will cause diseases like cholera, typhoid, diarrhoea, polio and hepatitis.

7. Long Answer Type Questions:

Question (i)
Write a brief note on open defecation.
Answer:
Open defecation.
Open defecation on railway tracks, banks of rivers or in the fields can cause health problems. It spreads many deadly diseases like cholera, typhoid, diarrhoea, polio and hepatitis.

About one lakh people die every year due to open defecation. In areas where open defecation is common, human feces and animal feces are swallowed by children accumulating large amounts of bacteria, parasites, and viruses in their bodies which causes diseases, even it leads to death.

Question (ii)
What steps will you take at home for efficient working of sewerage system ?
Answer:
Steps for efficient sewrage system at home. We should develop the following good habits for efficient sewerage system at the home.

  • Don’t waste water. Every time you go to toilet and you flush the toilet, water runs unnecessarily. So manage the amount of water to be used in toilets by putting a bottle filled with water or a brick in your flush tank which will maintain the water pressure and reduce the wastage of water.
  • Avoid using the toilet as a waste basket.
  • Install water-efficient toilets. Fix standard for reducing water consumption each time you flush.
  • Use only phosphate-free soaps and detergents.
  • Use washing machine only when you have full load of clothes.
  • Do not throw solid materials like tea leaves, wool, plastic envelopes (polythene), sanitary towels, soft toys etc. in the drainage water as they may block the drain. As a result, oxygen does not flow freely and the decomposition process slows down.
  • Do not throw substances like ghee, machine oil, grease, pesticides and other chemicals etc. in the drain as it can kill the water purifying microorganisms.

PSEB Solutions for Class 7 Science Wastewater Story Important Questions and Answers

1. Fill in the Blanks:

(i) Cleaning of water is a process of removing ………………….. .
Answer:
contaminants

(ii) Waste water released by houses is called ………………… .
Answer:
sewage

PSEB 7th Class Science Solutions Chapter 18 Wastewater Story

(iii) Dried ……………… is used as manure.
Answer:
sludge

(iv) Drains get blocked by ………………. and ……………. .
Answer:
cooking oil, fats

(v) An open space covered by a lid is a passage through which a person can enter and check the sewage system is called …………….. .
Answer:
Manhole

2. Match the Column ‘I’ with Column ‘II’:

Column ‘I’ Column ‘II’
(i) Waste water treatment by-products (a) November 19
(ii) World Water Day (b) Breeding area for mosquitoes and flies.
(iii) Open defecation (c) Humus and bio gas
(iv) World Toilet Day (d) March 22

Answer:

Column ‘I’ Column ‘II’
(i) Waste water treatment by-products (c) Humus and bio gas
(ii) World Water Day (d) March 22
(iii) Open defecation (b) Breeding area for mosquitoes and flies.
(iv) World Toilet Day (a) November 19

3. Choose the Correct Answer:

Question (i)
A network of small and large underground pipes:
(a) Sewage
(b) Humus
(c) Stool excretion
(d) None of these
Answer:
(a) Sewage.

Question (ii)
World Water Day is celebrated:
(a) March 22
(b) 22 February
(c) April 22
(d) 22 June
Answer:
(a) March 22.

Question (iii)
Which gas absorbs ultraviolet radiation ?
(a) Nitrogen
(b) Oxygen
(c) Ozone
(d) Hydrogen
Answer:
(c) Ozone.

Question (iv)
Contaminated water causes diseases:
(a) Jaundice
(b) Diarrhoea
(c) Cholera
(d) All of the above
Answer:
(d) All of the above.

PSEB 7th Class Science Solutions Chapter 18 Wastewater Story

Question (v)
Malaria can spread through:
(a) Open drains
(b) Taps
(c) Closed drains
(d) Water pipes
Answer:
(a) Open drains

State True or False:

(i) Untreated sewage should be disposed of in reservoirs.
Answer:
False

(ii) Residual oil and ghee should be drained.
Answer:
False

(iii) Throwing polythene bags or pieces in the drains can choke the drain.
Answer:
True

(iv) Litter should be thrown in the dustbin only.
Answer:
True

(v) The solid settling at the bottom of a water purification tank is called sludge.
Answer:
True

Very Short Answer Type Questions

Question 1.
Which is World Water Day ?
Answer:
World Water Day : 22 March.

PSEB 7th Class Science Solutions Chapter 18 Wastewater Story

Question 2.
What is cleaning of water ?
Answer:
Cleaning of Water. Removing pollutants from waste water.

Question 3.
What is common name of waste water treatment ?
Answer:
Sewage Treatment.

Question 4.
How is Sewage formed ?
Answer:
Sewage. It is waste water discharged by homes, industries, hospitals, offices and other users.

Question 5.
Which organisms cause dysentery ?
Answer:
Microbes.

Question 6.
What is sewerage ?
Answer:
Sewerage. Network of small and big pipes called sewers form sewerage.

Question 7.
Which chemicals destroy water micro-organisms?
Answer:
Paints, painkillers, oils, medicines, etc destroy micro-organisms.

Question 8.
Why should solid waste not be dumped in drains?
Answer:
Because they pollute the drains and block the free flow of oxygen.

PSEB 7th Class Science Solutions Chapter 18 Wastewater Story

Question 9.
How does oxygen purify waste water?
Answer:
Oxygen helps in biodegradation.

Question 10.
Write the names of two causes for spread of diseases.
Answer:
Unhygienic surroundings and Polluted water.

Question 11.
Name the plant used at places where sewerage system is not available.
Answer:
Septic tank.

Short Answer Type Questions

Question 1.
Give a short account of alternative arrangements for sewage disposal.
Answer:
The alternative arrangements for sewage disposal are septic tanks, chemical toilets, compositing pits, etc.

All these are low cost onsite sewage disposal systems and are suitable for places where there is no sewerage systems. For example, in hospitals, isolated building or a cluster of 4-5 houses in a remote area.

Question 2.
Name some practices used at home which can minimise the waste production.
Answer:
Practices used at home to minimise waste.

  • Greasy, oily things should not be dumped into drains, as they block (choke) the drains.
  • Chemicals, paints, insecticides etc. should not be thrown into drains as they kill microbes that help to purify water.
  • Solid wastes, used tea leaves, sanitary towels etc. should be thrown in dustbins and not in drains as they choke the drains.

Question 3.
What is Sewage ? Explain why it is harmful to discharge untreated sewage into rivers or seas.
Answer:
Sewage. Sewage is a liquid waste which has lot of dissolved and suspended pollutants in water. It is complex in nature.

It is produced in homes, industries, agricultural fields and in other human activities. It is main cause of water and soil pollution.

Harmful aspects of disposal of untreated water waste:

  1. It causes health hazards.
  2. Ground water and surface water gets polluted.
  3. It is carrier of water borne diseases.

Question 4.
Why should oil and fats be not released in the drain ? Explain.
Answer:
Oil and fats on hardening block the drain pipes. In open drains, the oils clog the soil particles reducing their power of filtering.

PSEB 7th Class Science Solutions Chapter 18 Wastewater Story

Question 5.
Describe the steps involving in getting clarified water from waste-water.
Answer:
Steps to get clarified water from waste water:

  1. Passing waste water through bar screening to remove large objects like rags, plastics, cans etc.
  2. Passing through grit and sand. Removal tank with slow speed to settle down sand and dust particles.
  3. Settling down of water is done in a big tank which has a slope in middle to remove faecal matter and floatable solids such as oils and grease. Water so obtained is called clarified water.

Question 6.
What is sludge ? Explain how it is treated.
Answer:
Sludge.
It is solid faecal matter collected from the waste water after passing through screen bars and grit and sand removal tank.

Treatment of Sludge.
It is collected in a tank to be treated by anaeroboic bacteria. The biogas produced is used for generating electricity. Dried sludge is used as a manure.

Question 7.
Untreated human excreta is a health hazard. Explain.
Answer:
Untreated human excreta.

  1. It is a breeding place for mosquitoes, flies and other insects.
  2. It is full of foul smell.
  3. It contaminates water and soil,
  4. It is carrier of many diseases.

Question 8.
Name two chemicals used to disinfect water.
Answer:

  1. Chlorine and
  2. Ozone.

Long Answer Type Question

Question 1.
Give a detailed account of waste water treatment plant.
Answer:
Waste water is contaminated with physical, chemical and biological pollutants. To remove all these physical, chemical and biological processes are to be involved.

(i) Bar-Screen treatment. Wastewater is allowed to pass through big bar screens to remove solid large objects such as napkins, tins, cans, sticks, plastics, etc.

(ii) Grit and sand removal tank. The wastewater is allowed to pass through these tanks at a very low speed so that sand, dust, and insoluble heavy particles settle down in these tanks.

(iii) Separating the sludge. In this process, water is put into a large tank whose middle portion is sloped. All solids get settled down and are removed with a scraper. This solid waste is known as sludge. Some floating solids are removed by a skimmer. Water, thus, obtained is called clarified water.

Now two separate processes are to be followed.

(a) Sludge is transferred to a tank to be decomposed by anaerobic bacteria when biogas is produced as a by-product.

(b) In the clarified water, aerobic bacterias are present to enhance their functioning. Air is pumped into the water. Bacteria consume the impurities left in water and settle down at the bottom. The water is then removed from the top. While the sludge settled at the bottom is dried and used as manure.

(iv) The above water is either discharged into sea or river to be naturally cleaned or treated with chlorine or ozone and supplied for further use.

PSEB 7th Class Computer Solutions Chapter 2 Windows Explorer

Punjab State Board PSEB 7th Class Computer Science Book Solutions Chapter 2 Windows Explorer Textbook Exercise Questions and Answers.

PSEB Solutions for Class 7 Computer Science Chapter 2 Windows Explorer

Computer Guide for Class 7 PSEB Windows Explorer Textbook Questions and Answers

Choose the Suitable Option and fill in the Blanks:

Question 1.
Windows Explorer has two panes. These are …………… and …………….
(a) First, Second
(b) Left, Right
(c) Top, Bottom
(d) File, Folder.
Answer:
(b) Left, Right

Question 2.
……………. type and date of modified of a file.
(a) Details
(b) Tiles
(c) List
(d) Content.
Answer:
(a) Details

PSEB 7th Class Computer Solutions Chapter 2 Windows Explorer

Question 3.
………………… command is used to move an item from its place.
(a) Copy
(b) Paste
(c) Cut
(d) Delete.
Answer:
(c) Cut

Question 4.
A …………. combination of pictures, colors and sounds on our computer.
(a) Background
(b) Desktop
(c) Screen Saver
(d) Theme.
Answer:
(d) Theme.

Question 5.
A …………. software program that becomes activated after the computer is not in use for a specified duration of time.
(a) Background
(b) Desktop
(c) Screen Saver
(d) Theme.
Answer:
(c) Screen Saver.

PSEB 7th Class Computer Solutions Chapter 2 Windows Explorer

2. Very Short Answer Type Questions

Question 1.
Which Window application is used for management of flies?
Answer:
Windows Explorer is used to manage files properly.

Question 2.
What do we call a folder inside another folder?
Answer:
Sub-folder.

Question 3.
What is the method of opening Windows Explorer?
Answer:
There are ways to open Windows Explorer.

  • Press Windows key + E.
  • Type Explorer in the Run box.

PSEB 7th Class Computer Solutions Chapter 2 Windows Explorer

Question 4.
Write the name of any default library of Window.
Answer:
By default Windows has four libraries-Documents, Music, Pictures, and Videos.

Question 5.
Which option is used to make a duplicate of an item?
Answer:
The copy/paste option is used to make a duplicate of an item.

PSEB 7th Class Computer Solutions Chapter 2 Windows Explorer

3. Short Answer Type Questions

Question 1.
How many panes are available in Window Explorer? Write their names.
Answer:
Windows Explorer has two panes.

  • Left pane
  • Right pane.

Question 2.
Write the name of different parts of Window Explorer.
Answer:
Windows Explorer has the following components:

  1. Title bar
  2. Back and forward buttons
  3. Address bar
  4. Search box
  5. Menu bar
  6. Tool bar
  7. Status bar.

Question 3.
Define File and Folder.
Answer:
A file is a common storage unit in a computer in which data, programs, software, etc. are stored. Computers have different files that have different functions. The data stored in the file can be “updated, deleted, edited” at any time.
The folder is where the files are stored. We can save more than one file and folder in one folder. For example I have a box containing 10 apples. In this example the box is a folder and the apples are the files saved in it. Another folder inside any folder is called a sub-folder.

PSEB 7th Class Computer Solutions Chapter 2 Windows Explorer

Long Answer Type Questions

Question 1.
What is Windows Explorer? Give different ways to open Windows Explorer.
Answer:
Windows Explorer is also called File Explorer. It is used to view files and folders on our computer. We can open the data, folder and library of the disk in the computer and also search for an item. We can use it to open, delete, rename, copy, move and create new folders.
We can open window explorer in many ways. Some of these are as follow:

  • Just press Win key +E and File Explorer starts immediately.
    Or
  • Click Windows-Keys > All Programs > Accessories > Windows Explorer.
    Or
  • Press Windows key – the search box will open. Now type file explorer in it.
    Or
  • Press Windows key +R key together. The Run box will open. Now type explorer in it.
    Or
  • By default, Windows 10 includes a File Explorer shortcut on the taskbar. Its icon looks like a folder. Click or tap on it and File Explorer is opened.

Question 2.
Explain different views of Windows Explorer.
Answer:
View means how files and folders appear in a computer system. Explorer has five types of views. These are:
1. Small, Medium, Large and Extra Large Icons View:
Items in this view are in more than one row and each item appears in the shape of an icon. Each item has a name.

2. Tiles Icon View:
Items in this view are in more than one row and each item appears in the shape of an icon. Each item has a name. It contains other information, such as the type of file and its size.

3. List Icon View:
Items in this view are in more than one column. Each item has a name and the icon, is to the left of the name.

4. Content Icon View:
Items in this view appear in the column. Each item is in the shape of an icon. It has a name and type of the file is written below it. Some other properties such as modification date and size below it are also visible. By default this view is used for search.

5. Detail Icon View:
Each item appears as a table row. The first column contains the name of the item in the form of a small icon and the rest of the column lists its properties such as its size and the date and type of modification.

PSEB 7th Class Computer Solutions Chapter 2 Windows Explorer

Question 3.
What are the options to customize the Desktop in Windows Environment?
Answer:
Customizing is the process of changing the settings of a desktop.
1. Themes:
Themes are a combination of pictures, colors, and sounds. It has background, screen saver, border color and sound scheme.
Windows has the following themes:

  • My Themes
  • Arrow Themes
  • Basic and High Contrast The-mes Following are the steps to apply the theme:

Open Settings.

  • Click on Personalization.
  • Click on Themes.
  • Click the Get more themes in the Microsoft Store option.
  • Select the theme you want.
  • Click the Get button.
  • Click the Apply button.
  • Click the newly added theme to apply it from the “Themes” page.

2. Desktop Background:
It is a wallpaper image that appears behind the icons on your computer’s desktop. It can be in JPEG or Gif format. The following are steps to change the desktop background:

  • Right-click the desktop and choose Personalize from the shortcut menu. The Personalization window appears.
  • Click the Desktop Background link. The Desktop Background dialog box appears.
  • Select a category of desktop background options from the Picture Location list box and then click the image from the background preview list that you want to use.
  • The background is previewed on your desktop. Click Save Changes.

3. Screen Saver:
Screen saver is the graphics that appear on the screen after not working on the computer for some time. It is used for security and protection of the screen. We can set our own screen saver.
Steps to set the screen saver: Here are the steps to set up a screen saver:

  • Right-click the desktop and choose Personalize from the shortcut menu. The Personalization window appears.
  • Click the Lock Screen option. The lock screen dialog box appears.
  • In the Screen Saver Settings window, choose a screen saver from the drop-down list.
  • Click on the Preview button to preview the screen saver.
  • The screensaver has to be set to run automatically from the desktop. So type the time setting in the Wait option that appears in the picture.
  • Click on Apply button and press Ok button.

Question 4.
How can we Copy items using the ‘send to’ option?
Answer:
The Send to Option is an easy way to copy one or more items or programs to a new location. Following are the steps to use Send to option:

  • Select the item to be copied.
  • Press the right mouse button; select the option “Send To” from the menu.
  • Now select the specified location. By default, the Send To sub menu contains the following locations:
    • Compressed (zipped) folder
    • Desktop (Create Short-cut)
    • Documents Library
    • Fax and mail recipients
    • Removable devices, such as: USB. Memory Sticks
  • Select the option as needed.

PSEB 7th Class Computer Solutions Chapter 2 Windows Explorer

Question 5.
Write about Screen Saver.
Answer:
Screen saver is the graphics that appear on the screen after not working on the computer for some time. It is used for security and protection of the screen. We can set our own screen saver.
Steps to set the Screen Saver:
Here are the steps to set up a screen saver:

  • Right-click the desktop and choose Personalize from the shortcut menu; The Personalization window appears.
  • Click the Lock Screen option. The lock screen dialog box appears.
  • In the Screen Saver Settings window, choose a screen saver from the drop-down list.
  • Click on the Preview button to-preview the screen saver.
  • The screensaver has to be set to run automatically from the desktop. So type the time setting in the Wait option that appears in the picture.
  • Click on Apply button and press Ok button

PSEB 7th Class Computer Guide Windows Explorer Important Questions and Answers

PSEB 7th Class Computer Solutions Chapter 2 Windows Explorer

1. Fill in the Blanks

Question 1.
Windows Explorer has ………. views.
(a) Two
(b) Three
(c) Four
(d) Five.
Answer:
(d) Five.

Question 2.
The ………………. command is used to run the program.
(a) Calculator
(b) Window
(c) View
(d) Bun.
Answer:
(d) Bun.

Question 3.
The …………. view displays the files as a list.
(a) Tile
(b) Content
(c) Large
(d) I&t.
Answer:
(d) I&t.

PSEB 7th Class Computer Solutions Chapter 2 Windows Explorer

Question 4.
The ………… option is used to copy files and folders.
(a) Cut
(b) Copy
(c) Paste
(d) Run.
Answer:
(b) Copy

Question 5.
Explorer can be run by typing …………….. in the run box.
(a) Exp
(b) Explorer
(c) Command
(d) GMD.
Answer:
(b) Explorer

Question 6.
The …………… option is used to find files and folders.
(a) Select
(b) File
(c) Search
(d) Delete.
Answer:
(c) Search

Question 7.
The calculator is opened by typing …………….. in the run box.
(a) Calculator
(b) Cal
(c) Calc
(d) None of these.
Answer:
(c) Calc

PSEB 7th Class Computer Solutions Chapter 2 Windows Explorer

Question 8.
The ………… command is used to remove an item from its place.
(a) Copy
(b) Paste
(c) Cut
(d) Delete.
Answer:
(c) Cut

2. True/False

Question 1.
Explorer is used to manage folders.
Answer:
True

Question 2.
A folder can contain many files and folders.
Answer:
True

Question 3.
How to open Explorer
Start> All Programs> Accessories> Windows Explorer
Answer:
True

PSEB 7th Class Computer Solutions Chapter 2 Windows Explorer

Question 4.
Explorer is a system software.
Answer:
False

Question 5.
“Invert Selection” option is used to reverse the selection.
Answer:
True

Question 6.
To select all files in a folder press Ctrl+A keys.
Answer:
True

Question 7.
A single file can contain many files and folders.
Answer:
False

Question 8.
Windows Explorer is an operating system.
Answer:
False

Question 9.
The Copy option is used to duplicate an item.
Answer:
True

PSEB 7th Class Computer Solutions Chapter 2 Windows Explorer

3. Match the Columns

Column A Column B
1. Views of Explorer (a) List
2. Calculator (b) Deleted files
3. Desktop (c) Picture, Music
4. My Documents (d) Background
5. Recycle Bin (e) Calculations.

Answer:

Column A Column B.
1. Views of Explorer (a) List
2. Calculator (e) Calculations.
3. Desktop (d) Background
4. My Documents (c) Picture, Music
5. Recycle Bin (b) Deleted files

4. Short Answer Type Questions

Question 1.
What is Windows Explorer?
Answer:
Windows Explorer is a very important application of operating system. This manages files and folders. It helps to keep files and folders in the correct order i.e cut, copy, paste and delete them.

Question 2.
How to delete files and folders?
Answer:
Delete command is used to delete a file or folder. Following are the steps to delete file/folder:

  • Select the file or folder you want to delete.
  • Press the Delete key from the keyboard. A message will appear asking for deletion.
  • Click on “Yes”. Item will be deleted.

If you want to delete file permanently then you will need to empty the Recycle Bin.

PSEB 7th Class Computer Solutions Chapter 2 Windows Explorer

Question 3.
Write down steps to create a new folder.
Answer:
Here are some ways to Create a File in Explorer:

  • Select the drive or folder in the left pane where you want to create the place of the cursor where you want to add your folder.
  • In File Explorer, click on the Home menu item.
  • From the Home ribbon, click on the New folder button.
  • Enter the name of your new folder and press enter key.

Question 4.
How is a file or folder restored?
Answer:
Sometimes when we delete a file or folder we feel the need for it later. The Recycle Bin feature can be used to store files and folders again. The steps to restore a file or folder are as follows:

  • Double click on the Recycle Bin. (The Recycle Bin window will open.)
  • Click on the file or folder to be restored.
  • Click on File. Restore menu.

Question 5.
What do you know about calculators?
Answer:
Calculator:
Calculator is like a program with the help of which calculations are done. With its help +, c, z etc. calculations are done. For example, to multiply 2 by 5, first click on 2. Then click on the multiplication sign. Then click on 5. Then click the = sign. 10 will appear as a result.

PSEB 7th Class Computer Solutions Chapter 2 Windows Explorer

5. Long Answer Type Questions

Question 1.
What is a series of locations? Explain in detail.
Answer:
Series of Locations:
The folders and drives in the computer, the computer connected to the network and its shared folders, drives and printers are arranged in a tree shape. This sequence is called a series of locations. It contains the following items:

1. Favorites:
The top most folder in this series is the Desktop folder. It contains desktop, downloads and recent place items.
PSEB 7th Class Computer Solutions Chapter 2 Windows Explorer 1

2. Library Folder:
By default this folder contains four libraries, such as; Documents, music, photos and videos. These folders contain related items; Such as pictures in pictures folder, related videos in video folder, etc.
PSEB 7th Class Computer Solutions Chapter 2 Windows Explorer 2

3. Personal Folder:
Your personal folder is named after the user name to which you have logged in to the computer and by default it contains the following folders; such as Contacts, Downloads, Favorites, Links, My Documents, My Music, My Pictures, My Videos, Saved Games and Search.
PSEB 7th Class Computer Solutions Chapter 2 Windows Explorer 3

4. MY Computer:
Disks in a computer; such as C: drive, D: Drive, E: Drive etc. and other connected devices such as Printer, USB, memory- stick and camera are attached to the computer, they are visible here.
PSEB 7th Class Computer Solutions Chapter 2 Windows Explorer 4

5. Network: If you are connected to a local network, you see other computers and devices in it.
PSEB 7th Class Computer Solutions Chapter 2 Windows Explorer 5

6. Control Panel:
Control Panel is used to configure hardware and software of computer system and to change settings of computer system.
PSEB 7th Class Computer Solutions Chapter 2 Windows Explorer 6

7. Recycle Bin: It contains deleted files/folders or programs.
PSEB 7th Class Computer Solutions Chapter 2 Windows Explorer 7

Question 2.
How are items selected? Write different ways to do this.
Answer:
Selecting the Items:
Usually before doing any work on a file or folder such as opening a file, closing a file, deleting file, copy a file etc. we have to select it. There are different ways to select a single file/folder or multiple files/folders.

1. Selecting a Single Item:
If more than one item is available and you want to select one of the items in it, it can be selected by clicking with the mouse on that file.

2. Selecting More Than One File:
There are a few ways to select more than one file at a time:

(a) If your viewing your files as icons, you can click and drag the mouse to draw a box around the files you want to select. When you’re done, release the mouse; the files will be selected. You can now move, copy, or delete all of these files at the same time.

(b) Selecting All Items:
If you want to select all files in a folder at the same time, open the folder in File Explorer and press Ctrl+A or click “Select all” option from the “Select” group on the Home tab. All of the files in the folder will be selected.

(c) Select items using the Shift key:
To select a group of files from a folder, click the first file, press and hold the Shift key on your keyboard, then click the last file. All of the files between the first and last ones will be selected.

(d) Selecting an item using (Ctrl key):
To select specific files from a folder, press and hold the Control key on your keyboard, then click the files you want to select.

3. Reverse selection: To reverse the selection, select the “Invert Selection” option in the Edit menu.

PSEB 7th Class Computer Solutions Chapter 2 Windows Explorer

Question 3.
Write different ways to create a folder.
Answer:
Creating a Folder
If you want to create a new folder, it is created in the current location. Here are some ways to create a folder:
1. Open the File explorer, click on the “New Folder” button option.
2. The new folder will appear.
Type the desired name for the folder and press Enter.
Or
Press the Ctrl + Shift + N keys together from the keyboard. The new folder will appear. Type the name of the folder and press Enter key.
Or
Right-click on a blank space, click “New” => “Folder” in the context menu. The new folder will appear. Type the name of the folder and press Enter key.
Or

  • Place the cursor where you want to add your folder.
  • In File Explorer, click on the Home menu item.
  • From the Home button, click on the New folder button.
  • Enter the name of your new folder and press

PSEB 7th Class Computer Solutions Chapter 2 Windows Explorer

Question 4.
Write the steps to rename the item.
Answer:
Re-naming the Item:
You can change the name of any file or folder. Here are the steps to rename an item:
1. Click the file or folder, wait about one second, and click again. An editable text field will Explore appear. open
2. Type the desired name on your keyboard and press Enter. The name will be changed.

Or
1. You can also right-click the Cut folder and select “Rename” copy option from the menu that create shortcut appears. An editable text field will appear.
2. Type the desired name from Properties keyboard and press Enter. The name will be changed.

Question 5.
Write the steps to delete an item.
Answer:
Delete a File or Folder:
If you no longer need to use a file, you can delete it. When you delete a file, it is moved to the Recycle Bin, If you change your mind, you can move the file from the Recycle Bin back to its original location. If you’re sure you want to permanently delete the file, you will need to empty the Recycle Bin. Following are the steps to delete file/folder:

  • Select the file or folder you want to delete.
  • Press the Delete key from the keyboard. A message will appear asking for deletion.
  • Click on “Yes”. Item will be deleted.

Question 6.
Write the steps for copying or pasting items.
Answer:
Copying or Pasting Items:
To copy a file/folder the steps are as follow:
1. Select the item to be copied.


2. Select the “Copy” option from the “Clipboard” group on the “Home” tab.
Or
Press Ctrl + c keys from the keyboard.
Right-click on the file/folder you want to copy. A menu will open. From this menu select the “copy” option. Now your file/folder will be copied. Steps to paste the file/Folder are as follow:
1. Place the cursor where you want to paste the file/folder.
2. Select the “Paste” option from the “Clipboard” group on the “Home” tab.
3. Your copied item will now be pasted.
Or
Press the Ctrl + V key from the keyboard.
Or
Locate and right-click the desired location, then select “Paste” option from the menu appeared.

PSEB 7th Class Science Solutions Chapter 13 Motion and Time

Punjab State Board PSEB 7th Class Science Book Solutions Chapter 13 Motion and Time Textbook Exercise Questions and Answers.

PSEB Solutions for Class 7 Science Chapter 13 Motion and Time

Science Guide for Class 7 PSEB Motion and Time Intext Questions and Answers

Think and Answer (Textbook Page No. 162)

Question 1.
What is a simple pendulum?
Answer:
Simple pendulum. It consists of a heavy mass (metal sphere) tied to a thread and suspended a fixed point of rigid support.

Question 2.
What is the to and fro motion of a simple pendulum called?
Answer:
The to and fro motion of a simple pendulum is called oscillation.

PSEB 7th Class Science Solutions Chapter 13 Motion and Time

Question 3.
The time taken for one oscillation of the pendulum is called its ……………… .
Answer:
Time Period.

Question 4
………………… is the number of oscillations per unit time.
Answer:
Frequency.

Think and Answer (Textbook Page No. 163)

Question 1.
What do we measure by using a stop clock ?
Answer:
Stop clock is used to measure short-time intervals.

Question 2.
What is the unit of measuring distance ?
Or
Name the S.I. unit of distance.
Answer:
Meter.

PSEB 7th Class Science Guide Motion and Time Textbook Questions and Answers

1. Fill in the Blanks:

(i) The motion of an object in a straight line is called ……………… .
Answer:
Linear motion

(ii) A clock is used to measure …………………. .
Answer:
Time

(iii) The distance-time graph for uniform speed is a ………………. line.
Answer:
Straight line

PSEB 7th Class Science Solutions Chapter 13 Motion and Time

(iv) The motion of a simple pendulum is called ………………….. motion.
Answer:
Oscillatory

2. Write True or False:

(i) Speed is the distance travelled by an object per unit time.
Answer:
True

(ii) The S.I. unit of speed is Km/s.
Answer:
False

(iii) The time taken to complete one oscillation of a pendulum is its time period.
Answer:
True

(iv) The instrument used to measure the speed of a vehicle is odometer.
Answer:
True

Match the Column I with Column II:

PSEB 7th Class Science Solutions Chapter 13 Motion and Time 1
Answer:
PSEB 7th Class Science Solutions Chapter 13 Motion and Time 2
PSEB 7th Class Science Solutions Chapter 13 Motion and Time 3

4. Choose the Correct Answer:

Question (i)
Which of the following is a Distance-Time Graph for an object at rest ?
PSEB 7th Class Science Solutions Chapter 13 Motion and Time 4
Answer:
(c) A straight line graph parallel to horizontal (x-axis) axis

PSEB 7th Class Science Solutions Chapter 13 Motion and Time

Question (ii)
Which of the following relation is a correct for finding speed of an object ?
(a) Speed = Distance × Time
(b) Speed = Distance/Time
(c) Speed = Time/Distance
(d) Speed = 1 /Distance × Time.
Answer:
(b) Speed = Distance/Time

Question (iii)
Simple pendulum is an example of ……………….. motion.
PSEB 7th Class Science Solutions Chapter 13 Motion and Time 5
(a) Rectilinear motion
(b) Oscillatory motion
(c) Periodic motion
(d) Rotational motion.
Answer:
(c) Periodic motion

Question (iv)
A car moves with a speed of 40 km/h for 15 minutes and then with speed of 60 km/h for the next 15 minutes. The total distance covered by the car is:
(a) 100 km
(b) 25 km
(c) 15 Km
(d) 10 Km
Answer:
(b) 25 km.

5. Very Short Answer Type Questions:

Question (i)
Define speed. Give its S.I. units ?
Answer:
Speed. The distance travelled per unit time is called speed of the object.
Speed (v) = Total distance covered (s)/ Total time spent (t)
S.I. unit of speed is m/s.

Question (ii)
Which instruments were used for measuring time by the ancient people ?
Answer:
In ancient times, people measured time by natural phenomena. Over time some devices were invented for measuring time. Some of them are given below:
(1) Solar Clock. A change in the position of the sun due to a change in the position of the shadow is used to measure time.
(2) Hour Glass. To measure the time it takes one hour for sand to flow from one bulb to another.
(3) Water Clock. Used to measure the flow of water from one vessel to another at a particular time.
(4) Pendulum. A simple pendulum takes equal time for each oscillation. So Pendulum was used to measure time.

Question (iii)
Name the instruments used for measuring : (a) the speed of a moving vehicle, (b) the distance moved by a vehicles.
Answer:
(a) Instrument for measuring speed of a moving vehicle is Speedometer.
(b) Instrument for measuring distance covered by a vehicle is Odometer.

Question (iv)
What is Graph ? Give its types.
Answer:
Graph. A graph is a pictorial representation of variation of one quantity with respect to the other quantity. When one quantity is changed, the value of the other quantity also changes by itself.

Types of Graph. There are several types of graphs, such as:

  1. Linear graph,
  2. Bar graph,
  3. Pie chart.

PSEB 7th Class Science Solutions Chapter 13 Motion and Time

6. Short Answer Type Questions:

Question (i)
Differentiate between slow and fast motion. Give examples.
Answer:
Slow motion. If an object takes too long to cover a short distance, its motion is called slow motion. Example : Motion of tortoise and snail.

Fast motion. If an object takes less time to cover the same distance, its motion is fast motion.
Example : Racing car and leopard is fast motion.

Question (ii)
Differentiate between uniform and non-uniform motion. Give examples.
Answer:
Uniform motion.
If an object travels equal distances in equal interval of time regardless of the however small the interval may be their its motion is called uniform motion.
For example : A bus covers a distance of 10 km in the first 15 minutes and a distance of 10 km in the next 15 minutes, then again in the next 15 minutes it covers the same distance of 10 km. The bus is said to have uniform motion.

Non-uniform motion.
If an object does not cover equal distances in equal interval of time however small the time interval may be, then the motion of that object is called non-uniform motion.
Example : Suppose a car covers a distance of 25 km in 10 minutes on a straight road and travels 30 km in the next 10 minutes and 20 km in the next 10 minutes, then the car is said to have is non-uniform motion.

Question (iii)
Ajay goes to his school 600 meters away from his house. Find the speed in ms-1, with which he must walk to reach his school in 5 minutes.
Solution:
Distance from Ajay’s school from his house = 600 meters
Time taken to cover the distance from school to house = 5 minutes
We know 1 minute = 60 sec.
So, Time taken = 5 × 60 seconds
= 300 seconds
Total distance covered = 600
Now speed of Ajay = PSEB 7th Class Science Solutions Chapter 13 Motion and Time 6
= \(\frac{600 \text { metres }}{300 \text { second }}\)
= 2 m/s

Question (iv)
The distance between two stations is 216 km. In how many hours will a train reach the destination which is moving at a speed of 20 m/s ?
Answer:
Distance between two stations = 216 km
Speed of train = 20 m/s. [∵ 1km/h = \(\frac {5}{18}\) m/s]
= 20 x \(\frac {18}{5}\) km/h
= 72 km/h
PSEB 7th Class Science Solutions Chapter 13 Motion and Time 7

Question (v)
Find the time period of a simple pendulum, which takes 20 s to complete 50 oscillations ?
Solution:
Number of oscillations of a simple pendulum = 50
Time taken to complete 50 oscillations = 20 seconds
We know, Frequency = PSEB 7th Class Science Solutions Chapter 13 Motion and Time 8
= \(\frac {20}{50}\)
= \(\frac {2}{5}\) = 0.4 sec-1

7. Long Answer Type Questions:

Question (i)
Describe the method to find the time period of a simple pendulum.
Answer:
Make a simple pendulum by tying a metal sphere with one end of a thread about 1 meter long as shown in the diagram. If there is a fan running around, turn it off. Now let the bob of the pendulum come to rest in the middle position. Mark the middle position with chalk on the floor. Take a stop watch or mobile or wrist watch to measure the time period of the pendulum. Hold the bob and ensure that the thread is stretched and take it one extreme. Now release the sphere slowly. When the sphere is at its starting end, start the stop watch. Count the oscillations.
PSEB 7th Class Science Solutions Chapter 13 Motion and Time 9
Note the time taken by the pendulum to complete 20 oscillations. Record your observations in the table below. Time taken by the pendulum to complete one oscillation is called its time period. It is measured in second.

Sr. No. Time taken for 20 oscillations Time period
1.

2.

3.

Repeat this action 3-4 times and note observations in the table above.
You will notice that the time period of pendulum will be almost the same each time.

Question (ii)
A car moves a distance of 60 km in 1st hour, 75 km in 2nd hour, 55 km in 3rd hour and 50 km in 4th hour. Plot a distance-time graph for the motion of the car.
(1) Find the speed of the car for the whole journey.
(2) Find the speed of the car between 1st and 3rd hour.
Answer:
(1) Distance covered in the entire journey = 60 km + 75km + 55 km +50 km
= 240 km
And, Total time spent = 4 hours
The average speed of the car = The total distance covered/Total time spent
= 240 km/4 hr
= 60 km/hr

(2) Speed from the first hour to the third hour
Distance covered = 75 km + 55km
= 130 km
= 2 hours
Car speed between the first hour and the third hour =130 km/2hr = 65 km/hr
PSEB 7th Class Science Solutions Chapter 13 Motion and Time 10

PSEB 7th Class Science Solutions Chapter 13 Motion and Time

Question (iii)
Figure shown below represents the distance-time graph for the motion of two vehicles A and B. Which one of them is moving faster ?
PSEB 7th Class Science Solutions Chapter 13 Motion and Time 11
Answer:
Study of the distance-time graph of both the vehicles shows that the ratio of distance and time for vehicle A is higher than that of vehicle B, hence the speed of vehicle A is higher than that of vehicle B.

PSEB Solutions for Class 7 Science Motion and Time Important Questions and Answers

1. Fill in the Blanks:

(i) The distance covered by an object in unit time is called …………………
Answer:
Speed

(ii) The time taken by a pendulum to make a swing is called ………………………..
Answer:
Time period

(iii) An instrument used to measure the distance covered by vehicles is called ……………….
Answer:
Odometer

(iv) …………………… is the instrument that measures the speed of moving vehicles.
Answer:
Speedometer

(v) A graph drawn for the distance and time taken for a uniform motion is ………………………
Answer:
Straight line parallel to time axis

2. Match the Column ‘I’ with Column ‘II’:

PSEB 7th Class Science Solutions Chapter 13 Motion and Time 12
PSEB 7th Class Science Solutions Chapter 13 Motion and Time 13
Answer:
PSEB 7th Class Science Solutions Chapter 13 Motion and Time 14
PSEB 7th Class Science Solutions Chapter 13 Motion and Time 15

PSEB 7th Class Science Solutions Chapter 13 Motion and Time

3. Choose the Correct Answer:

Question (i)
The basic unit of time is:
(a) Minute
(b) Hour
(c) Second
(d) None of these.
Answer:
(c) Second.

Question (ii)
The Speed of train is expressed in :
(a) m/h
(b) km/h
(c) cm/h
d) mm/h.
Answer:
(b) km/h.

Question (iii)
The S.I. unit of speed is:
(a) m/s
(b) km/s
(c) cm/s
(d) mm/s.
Answer:
(a) m/s.

Question (iv)
Which of the following relation is correct:
(a) Speed = Distance × Time
(b) Speed = \(\frac{\text { Distance }}{\text { Time }}\)
(c) Speed = \(\frac{\text { Time }}{\text { Distance }}\)
(d) None of these.
Answer:
(b) Speed = \(\frac{\text { Distance }}{\text { Time }}\)

Question (v)
A motion which repeats itself after fixed interval of time is:
(a) Oscillatory motion
(b) Periodic motion.
(c) Time period
(d) None of these.
Answer:
(b) Periodic motion.

Question (vi)
The device which measures the distance moved by the vehicle is called:
(a) Speedometer
(b) Odometer
(c) Pendulum
(d) None of these.
Answer:
(b) Odometer.

Question (vii)
The time taken by a vibrating body to complete one oscillation is called:
(a) Time period
(b) Oscillation
(c) Uniform motion
(d) None of these.
Answer:
(a) Time period.

Question (viii)
Which of the following Distance-Time Graph shows the object at rest position ?
PSEB 7th Class Science Solutions Chapter 13 Motion and Time 16
(a) (i)
(b) (ii)
(c) (iii)
(d) None of the above.
Answer:
(a) (i).

PSEB 7th Class Science Solutions Chapter 13 Motion and Time

Question (ix)
What is the basic unit of speed ?
(a) km/min.
(b) m/min.
(c) km/hr.
(d) m/s.
Answer:
(d) m/s.

State True or False:

(i) The basic unit of time is second.
Answer:
True

(ii) Every object moves with a constant speed.
Answer:
False

(iii) Distances between two cities is measured in kilometres.
Answer:
True

(iv) The time period of a given pendulum is not constant.
Answer:
False

(v) The speed of a train is expressed in m/h.
Answer:
False

Very Short Answer Type Questions

Question 1.
The rate at which distance is covered corresponds to which quantity-speed or velocity ?
Answer:
Speed.

Question 2.
The rate at which displacement is covered corresponds to which quantity, speed or velocity ?
Answer:
Velocity.

PSEB 7th Class Science Solutions Chapter 13 Motion and Time

Question 3.
What is formula of average speed ?
Total distance covered
Answer:
Average speed = PSEB 7th Class Science Solutions Chapter 13 Motion and Time 17

Question 4.
Name two types of motions.
Answer:
(i) Uniform motion
(ii) Non-uniform motion.

Question 5.
Working of clock depends on which type of motion ?
Answer:
Periodic motion.

Question 6.
Name any two time measuring devices.
Answer:
(1) Clock,
(2) watch.

Question 7.
What is metallic ball of a pendulum known as ?
Answer:
Bob of the Pendulum.

Question 8.
What type of motion is shown by simple pendulum ?
Answer:
Oscillatory motion / Periodic motion

Question 9.
What is basic unit of time ?
Answer:
Second.

Question 10.
What are larger units of time ?
Answer:
Minute, hour

PSEB 7th Class Science Solutions Chapter 13 Motion and Time

Question 11.
What is odometer ?
Answer:
Odometer. The device which measures the distance moved by the vehicle, is called odometer.

Question 12.
What is function of speedometer ?
Answer:
It records speed directly in km/h.

Short Answer Type Questions

Question 1.
Which devices were used for measuring time before pendulum clocks ?
Answer:
(i) Sundial.
(ii) Water clock,
(iii) Sand clock.

Question 2.
What important points are to be kept in mind while choosing the most suitable scale for drawing a graph ?
Answer:
Points to be considered while choosing the scale for drawing a graph :
(0 The difference between the highest and the lowest values of each quantity.
(ii) The intermediate values of each quantity.
(iii) To utilize the maximum part of the graph paper.

Question 3.
What is a simple pendulum ?
Answer:
Simple pendulum. It consists of a small metallic ball or a piece of stone suspended from a rigid support by a thread. The metallic ball is called the bob of the pendulum.

Question 4.
Classify the following as Linear, circular or Periodic motion :
(i) Motion of your hands while running.
(ii) Motion of a horse pulling a cart on a straight road.
(iii) Motion of a child in a merry go round.
(iv) Motion of a child over see-saw.
(v) Motion of the hammer of an electric bell.
(vi) Motion of a train on a straight bridge.
Answer:
(i) Periodic motion
(ii) Linear motion
(iii) circular motion
(iv) Periodic motion
(v) Periodic
(vi) Linear Motion.

Question 5.
A simple pendulum takes 32 s to complete 20 oscillations. What is the time period of the pendulum ?
Solution:
Number of oscillations = 20
Time taken to complete 20 oscillations = 32 s
∴ Time period of pendulum = PSEB 7th Class Science Solutions Chapter 13 Motion and Time 18
(i.e. time taken to complete 1 oscillation) = \(\frac {32}{20}\)
= \(\frac {8}{5}\)
= 1.6 s

Question 6.
The distance between two stations is 200 km. A train takes 4 hours to cover this distance. Calculate the speed of the train.
Solution:
Distance covered by train between two stations = 200 km
Time taken t = 4 hr
∴ Speed of the train =PSEB 7th Class Science Solutions Chapter 13 Motion and Time 19
= \(\frac{200 \mathrm{~km}}{4 \mathrm{hr}}\)
= 50 km/hr

Question 7.
Salma takes 15 minutes from her house to reach her school on a bicycle. If the bicycle has a speed of 2 m/s, calculate the distance between her house and her school.
Time taken = 15 min.
= 15 × 60
= 900 sec
Speed of bicycle = 2 m/s
Distance covered = Speed × Time
= 2 × 900 m
= 1800 m
= \(\frac{1800}{1000}\)
= 1.8 km.

Long Answer Type Question

Question 1.
Define
(i) Periodic motion
(ii) Oscillatory motion
(iii) Oscillation
(iv) Time period.
Answer:
PSEB 7th Class Science Solutions Chapter 13 Motion and Time 20
(i) Periodic motion. A motion that repeats itself after a fixed interval of time is periodic motion.
(ii) Oscillatory motion. To and fro motion of an object about a fixed mean position is oscillatory or vibratory motion.
(iii) Oscillation. The motion of the pendulum from one extreme position to another extreme position and back to the first extreme position is one complete oscillation.
(iv) Time period. The time taken by a vibrating particle to complete one oscillation is called the time period of the pendulum.

PSEB 7th Class Computer Solutions Chapter 1 Typing Tutor

Punjab State Board PSEB 7th Class Computer Science Book Solutions Chapter 1 Typing Tutor Textbook Exercise Questions and Answers.

PSEB Solutions for Class 7 Computer Science Chapter 1 Typing Tutor

Computer Guide for Class 7 PSEB Typing Tutor Textbook Questions and Answers

Fill in the Blanks:

Question 1.
To use number pad, ……………. should be kept ON.
(a) Num lock
(b) Caps lock
(c) Scroll lock
(d) None of these.
Answer:
(a) Num lock

Question 2.
In home-row, …………… key is pressed with the little finger of left hand,
(a) A
(b) S
(c) D
(d) F.
Answer:
(a) A

PSEB 7th Class Computer Solutions Chapter 1 Typing Tutor

Question 3.
In home row, ……………. key is pressed with Middle finger of right hand.
(a) J
(b) K
(c) L
(d) ;
Answer:
(b) K

Question 4.
In second row, ………………. key is pressed with ring finger of left hand.
(a) Q
(b) W
(c) E
(d) R.
Answer:
(b) W

Question 5.
In third row, …………….. key is pressed with the index finger of right hand.
(a) B
(b) N
(c) M
(d) M, N.
Answer:
(d) M, N.

PSEB 7th Class Computer Solutions Chapter 1 Typing Tutor

2. Very Short Answer Type Questions

Question 1.
For typing purpose, a keyboard can be divided in how many parts?
Answer:
The keyboard for typing is divided into two parts. The first part is on the left side and the second part is on the right side.

Question 2.
Write the name of the technique for typing with all fingers without looking at the keyboard.
Answer:
Touch typing technology allows us to type without looking.

Question 3.
Write the name of any one font.
Answer:
Anmol Lipi font.

Question 4.
Which finger is used to press spacebar during typing?
Answer:
The thumb of your right hand is used to press the space bar key.

Question 5.
Which key is used to go to new line during typing?
Answer:
Enter key is used to move to new line.

PSEB 7th Class Computer Solutions Chapter 1 Typing Tutor

3. Short Answer Type Questions

Question 1.
What is touch typing?
Answer:
This is a technique by which we learn how to type correctly without looking at the keyboard. The keyboard is divided into two parts, left side and right side. Typing is done by placing the fingers on right position accordingly.
PSEB 7th Class Computer Solutions Chapter 1 Typing Tutor 1

Question 2.
Describe the position of our fingers on Home Row Key.
Answer:
The “home row” is the center row of keys on a keyboard. It starts from the alphabet A. The fingers are always rest on this line. The position of the fingers on this row is as follows:
First of all, the fourth finger (little finger) of our left hand is on the ‘A’ key, then third finger on the ‘S’ key, then second finger on the ‘D’ key and then first finger on the ‘F’ key and alternately on the ‘7’ key. The fourth, third, second and first fingers of the right hand should be on ‘L’, ‘K’, ‘J’ and ‘H’ respectively. Thumbs of both hands should be on space bar.
PSEB 7th Class Computer Solutions Chapter 1 Typing Tutor 2

Left Hand
Little/ Pinky Finger A
Ring Finger S
Middle Finger D
Index Finger F & G
Right Hand
Little/ Pinky Finger ;
Ring Finger L
Middle Finger K
Index Finger J & H

PSEB 7th Class Computer Solutions Chapter 1 Typing Tutor

Question 3.
What are the tips to improve typing speed?
Answer:
Typing speed can be increased by keeping the following in mind:

PSEB 7th Class Computer Solutions Chapter 1 Typing Tutor 3

    • Concentrate in consistently, comfortably and correctly typing.
    • The position of our hands I fingers should always be on the home-row We should always start from this position and come back to the saine position. We should move from the home-row position to other keys.
    • As we press each key, we should repeat that letter in our mind.
    • We should focus on pressing the right key rather than speed. Speed will increase automatically with time and practice.
    • Do not look at the keyboard.

Question 4.
While typing numbers from numeric keypad, which hand we should use? Explain the position of your fingers on numeric keypad
Answer:
The numeric keypad is located on the right hand side of the keyboard and has a total of 17 keys. They act as a calculator. While using the numeric keypad Num lock key must be turned on. Use the right hand when typing numbcon the numeric keypad.
PSEB 7th Class Computer Solutions Chapter 1 Typing Tutor 4
The position of the fingers on the numeric keypad is as follows:

      • The thumb of the right hand is on the ‘0’
      • On the first finger of the right hand ‘4’
      • The second finger of the right hand on the ‘5’ The third finger of the right hand on the ‘6’

PSEB 7th Class Computer Solutions Chapter 1 Typing Tutor

4. Long Answer Type Questions

Question 1.
Explain the proper posture while typing.
Answer:

      • The computer monitor should be in front of our eyes.
      • Our focus should be on the monitor.
      • Our fingers should be on the home-row keys.
      • We should sit straight and in front of the keyboard.
      • We should quickly press each key and return to the home- row position.
      • Our feet should be straight on the ground.
        PSEB 7th Class Computer Solutions Chapter 1 Typing Tutor 5

Question 2.
Explain Following Keys
(a) Enter key
(b) Backspace key
(c) Shift key Answer:
Answer:
(a) Enter Key: This key is used to move to a new line. We use the smallest finger of our right hand to press the Enter
PSEB 7th Class Computer Solutions Chapter 1 Typing Tutor 6
(b) Backspace key:
This key is used to delete a character to the left of the cursor. We use the little finger of our right hand for this.

(c) Shift Key:
This key is located on both side of the keyboard. It is used to write capital letters. If you want to type a capital letter with your left hand, press the shift key with the fourth finger of your right hand similarly, to write a capital letter with the right hand, press the shift key with the fourth finger of the left hand.
PSEB 7th Class Computer Solutions Chapter 1 Typing Tutor 7

PSEB 7th Class Computer Guide Typing Tutor Important Questions and Answers

PSEB 7th Class Computer Solutions Chapter 1 Typing Tutor

Question 1.
Type master is used for learning,
(a) Programming
(b) Computer
(c) Printing
(d) Typing.
Answer:
(d) Typing.

Question 2.
Keyboard is divided into sections.
(a) Three
(b) Four
(c) Two
(d) Five.
Answer:
(b) Four

Question 3.
The numeric pad is on the side.
(a) Right
(b) Left
(c) Upper
(d) Lower.
Answer:
(a) Right

Question 4.
The key is on both sides of the keyboard.
(a) Function
(b) Special
(c) Arrow
(d) Shift.
Answer:
(d) Shift.

PSEB 7th Class Computer Solutions Chapter 1 Typing Tutor

2. True/False

Question 1.
The typemaster helps to improve the typing speed.
Answer:
True

Question 2.
In touch typing we can type without touching the keyboard.
Answer:
False.

Question 3.
The numeric pad is on the right side of the keyboard.
Answer:
True

Question 4.
Text is typed with a numeric pad.
Answer:
False.

Question 5.
Shift key is only one.
Answer:
False.

PSEB 7th Class Computer Solutions Chapter 1 Typing Tutor

3. Short Answer Type Questions

Question 1.
Write instructions for keyboard expertise.
Answer:

  • Do not press the keys too quickly.
  • Press the keys evenly and equally.
  • Make it a habit to press the keys lightly.
  • After typing each word, press the space bar with the thumb of your right hand.
  • Your eyes, hands and brain need to be in perfect balance as you type.

Question 2.
What is a type master?
Answer:
Type master is a program that helps you learn to type and improve your speed. It helps us to type without looking at the keyboard.

Question 3.
What is numeric keypad?
Answer:
The numeric keypad is located on the right hand side of the keyboard and has a total of 17 keys. They act as a calculator. While using the numeric keypad Num lock key must be turned on. Use the right hand when typing numbers on the numeric keypad.

PSEB 7th Class Computer Solutions Chapter 1 Typing Tutor

Question 4.
What is a shift key?
Answer:
This key is located on both side of the keyboard. It is used to write capital letters. If you want to type a capital letter with your left hand, press the shift key with the fourth finger of your right hand similarly, to write a capital letter with the right hand, press the shift key with the fourth finger of the left hand.

Question 5.
State the position of the fingers on the second row.
Answer:
The keys on the above line of the home row are called the keys on the second line. It starts with the letter Q’. Turn the fourth finger (little finger) of your left hand on the ‘Q’ key, the third finger on the ‘W’ key, the second finger on the ‘E’ key and the first finger on the ‘R’ key or the “T” key. Similarly, place the fourth finger of the right hand on the ‘P’ key, the third finger on the ‘O’ key, the second finger on the T key and the first finger on the ‘U ’or‘ Y ’key alternately.

PSEB 7th Class Computer Solutions Chapter 1 Typing Tutor 9

Left Hand
Little/ Pinky Finger Q
Ring Finger W
Middle Finger E
Index Finger R & T
Right Hand
Little/ Pinky Finger P
Ring Finger O
Middle Finger I
Index Finger U & Y

4. Long Answer Type Questions

Question 1.
Give some instructions for keyboard mastery.
Answer:
Typing speed can be increased by keeping the following in mind:
PSEB 7th Class Computer Solutions Chapter 1 Typing Tutor 10

      • Concentrate in consistently, comfortably and correctly typing.
      • The position of our hands I fingers should always be on the home-row We should always start from this position and come back to the saine position. We should move from the home-row position to other keys.
      • As we press each key, we should repeat that letter in our mind.
      • We should focus on pressing the right key rather than speed. Speed will increase automatically with time and practice.
      • Do not look at the keyboard.

PSEB 7th Class Computer Solutions Chapter 1 Typing Tutor

Question 2.
Write a note on shift key.
Answer:
Shift Key:
This key is located on both side of the keyboard. It is used to write capital letters, If you want to type a capital letter with your left
hand, press the shift key with the fourth finger of your right hand. Similarly, to write a capit.al letter with the right hand, press the shift key with the fourth finger of the left hand.

Question 3.
State the position of the fingers on the fourth row.
Answer:
Fourth Row:
The fourth row corresponds to the numeric keys. Be careful while typing the numbers. Our fingers should be on the home row. To type the numbers 100 correctly, it is recommended to press the numeric key with the corresponding finger and then bring it back to the home row, If all work is related to numbers, keep your fingers on the fourth line.
PSEB 7th Class Computer Solutions Chapter 1 Typing Tutor 11

Left Hand
Little/ Pinky Finger Z
Ring Finger X
Middle Finger C
Index Finger V & B
Right Hand
Little/ Pinky Finger /
Ring Finger .
Middle Finger ,
Index Finger M & N

PSEB 7th Class Computer Solutions Chapter 1 Typing Tutor

Question 4.
Write in detail about the special keys of the key board.
Answer:
Special Keys on Keyboard:
The special keys of the keyboard are as follows:
1. Enter Key:
This key is used to move to a new line, We use the smallest finger of our right hand to press the Enter key.

2. Space Bar: The space-bar key is used 1.0 leave a space in two words. We use our thumb to press the space key.

3. Shift Key:
This key is located on both side of the keyboard. It is used to write capital letters. If you want to type a capital letter with your left hand, press the shift key with the fourth finger of your right hand. Similarly, to write a capital letter with the right hand, press the shift key with the fourth finger of the left hand.

4. Backspace:
This key is used to delete a character to the left of the cursor. We use the little finger of our right hand for this.

5. Caps lock Key:
If the whole word, line or paragraph is to be written in capital letters, keep the Caps Lock Key in ON position. We use the little finger of our left hand for this.

PSEB 7th Class Computer Solutions Chapter 1 Typing Tutor

Question 5.
What are some ways to avoid stress and mistakes while typing on the computer?
Answer:
How to Avoid the Stress of Typing:
Stress and mistakes while typing on computer can be avoided as follows.

  • Set your keyboard so that it is straight and slightly raised at the back. Do not keep your keyboard tilted downwards.
  • Sit properly in front of your computer. Our screen should be two feet away from u and our copy should be in front of our eyes.
  • Stretch your arms before starting work and also during intervals and strengthen your arms with exercise.
  • We should re-st our wrists when we are not typing.
  • When typing, keep your wrists straight and bend your elbows at a 90 degree angle. Our wrists should not rest on the table while typing.
  • If sitting on a chair, our knees are bent 90 degrees and our feet are straight on the ground, then the height of our chair is perfect.
  • Exercise daily. This helps our body avoid stress after typing.
  • Rest for a short time instead of a large interval while typing.

PSEB 7th Class Science Solutions Chapter 15 Light

Punjab State Board PSEB 7th Class Science Book Solutions Chapter 15 Light Textbook Exercise Questions and Answers.

PSEB Solutions for Class 7 Science Chapter 15 Light

Science Guide for Class 7 PSEB Light Intext Questions and Answers

Think and Answer (Textbook Page No. 186)

Question 1.
The process of change in direction of light after falling on a mirror is called ……………….. of light.
Answer:
Reflection.

Question 2.
Angle of incidence is equal to angle of reflection. (True/False)
Answer:
True.

PSEB 7th Class Science Solutions Chapter 15 Light

Think and Answer (Textbook Page No. 189)

Question 1.
The distance between the object and the mirror is ……………… to the distance
between the image and the mirror.
Answer:
Equal.

Question 2.
Thes plane mirror has to be placed vertically on the graph paper. (True/False)
Answer:
True.

Question 3.
The plane mirror should be vertically upright.
Answer:
Right.

Think and Answer (Textbook Page No. 191)

Question 1.
The image of the sun formed by the concave mirror on the wall is …………………… image.
(Real/Virtual)
Answer:
Real.

Question 2.
Is the image of a candle seen using a concave mirror same as that the image of the Sun seen on the wall ?
Answer:
In both cases the rays of light are reflected from a concave mirror to form a real image.

Think and Answer (Textbook Page No. 192)

Question 1.
When the object is very far from the concave mirror, the image formed is ………………….
and
Answer:
Real, inverted/small in size.

Question 2.
The image formed on the screen is real.
Answer:
True. (True/False)

Question 3.
For a concave mirror, the image formed is always real.
Answer:
False.

PSEB 7th Class Science Solutions Chapter 15 Light

Think and Answer (Textbook Page No. 195) (True/False)

Question 1.
The bright spot of light obtained on the paper is the image formed due to effect.
Answer:
Converging.

Question 2.
The image obtained on the paper is the virtual image.
Answer:
False.

Think and Answer (Textbook Page No. 196) 

Question 1.
The convex lens is placed between the object and the screen. (True/False)
Answer:
True.

Question 2.
For a convex lens, the image formed is always real. (True/False)
Answer:
False.

Think and Answer (Textbook Page No. 198)

Question 1.
White light is composed of ………………. Colours. (True/False)
Answer:
Seven.

Question 2.
When disc with seven colours is rotated, it appears to be red. (True/False)
Answer:
False.

Question 3.
Name the seven colours of which the white light is made of.
Answer:
The seven colours of white light are:

  1. Violets,
  2. Indigo,
  3. Blue,
  4. Green,
  5. Yellow,
  6. Orange
  7. Red.

Collectively called VIBGYOR.

PSEB 7th Class Science Solutions Chapter 15 Light

PSEB 7th Class Science Guide Light Textbook Questions and Answers

1. Fill in the Blanks:

(i) An image formed by a ………………….. mirror is always of the same size as that of object.
Answer:
plane

(ii) In a plane mirror, the left hand of a person appears to be the ………………… hand in the image and ……………. hand appears to be the left hand in the image.
Answer:
right, right

(iii) The image formed by a convex mirror is always ………………… and ……………….. in size.
Answer:
erect, smaller

(iv) Convex lenses are ………………… in the middle and concave lenses are ……………….. in the middle than at the edges.
Answer:
thin, thick

(v) A prism splits the white light into ……………….. colours.
Answer:
seven

2. State True or False:

(i) There is reflection of light through a lens.
Answer:
False

(ii) The ray of light coming towards the plane mirror is called the reflected ray.
Answer:
False

PSEB 7th Class Science Solutions Chapter 15 Light

(iii) The image formed by a plane mirror is always in front of the mirror.
Answer:
False

(iv) A concave mirror is a part of hollow sphere of glass, whose outer side is coated with silver layer and reflection takes place from the inside.
Answer:
True

(v) Concave lens always forms a virtual, erect and smaller image of the object.
Answer:
True

3. Choose the Correct Answer:

Question (i)
Which of the following does not show reflection of light ?
(a) Plane mirror
(b) Concave mirror
(c) Convex mirror
(d) Card board.
Answer:
(d) Card board.

Question (ii)
Which is used for rear view in cars and other vehicles:
(a) Concave mirror
(b) Convex mirror
(c) Convex lens
(d) Concave lens.
Answer:
(b) Convex mirror.

Question (iii)
The image of an object formed by a concave lens is always ?
(a) Real and diminished
(b) Virtual and larger
(c) Real and larger
(d) Virtual and diminished.
Answer:
(d) Virtual and diminished.

Question (iv)
The process of splitting of white light in seven colours on passing through a prism is called:
(a) Reflection of light
(b) Refraction of light
(c) Bending of light
(d) Dispersion of light.
Answer:
(d) Dispersion of light.

PSEB 7th Class Science Solutions Chapter 15 Light

4. Match the Column ‘I’ with Column ‘II’:

Column ‘I’ Column ‘II’
1. Mirror used by dentists (a) Spectacles
2. Rear view Mirror (b) Microscope
3. Magnifying glass (c) Vehicles
4. Concave Lens (d) Concave

Answer:

Column ‘I’ Column ‘II’
1. Mirror used by dentists (d) Concave
2. Rear view Mirror (c) Vehicles
3. Magnifying glass (b) Microscope
4. Concave Lens (a) Spectacles.

5. Very Short Answer Type Questions:

Question (i)
Is the image formed by a plane mirror real or virtual ?
Answer:
The image formed by the plane mirror is Virtual.

Question (ii)
Which lens forms a real image of an object ?
Answer:
Convex lens forms a real image of the object.

Question (iii)
Which optical instrument uses convex lens ?
Answer:
Convex lens is used in a microscope.

Question (iv)
What is the seven rainbow coloured disc called ?
Answer:
The seven-rainbow coloured disc is called Newton’s disc.

6. Short Answer Type Questions:

Question (i)
Differentiate between Real and Virtual images. Give examples.
Answer:
Difference between Real image and Virtual image:

Real image Virtual image
1. The rays of light coming from the object are actually found to meet at a point after reflection or refraction. 1. The light rays coming from an object do not actually meet but appear to meet at a single point after reflection or refraction.
2. They are always inverted. 2. They are always erect.
3. Real image can be obtained on a screen.

Example : (a) If the object is too far away from the concave mirror, the image becomes too small and inverted. When the object is brought closer to the concave miiror, the image after reflection becomes large and real.

(b) If the object is in front of a convex lens then the rays coming from that will form a real, inverted image after refraction.
PSEB 7th Class Science Solutions Chapter 15 Light 1

3. Virtual image can not be obtained on a screen

Example : (a) If the object is between the focal point of the concave mirror and the object, then the image is large, upright and virtual.In the convex mirror for each position of the object, the image obtained is virtual, erect and small.

(b) If the object is between the focal point of the convex lens and the lens, then image is virtual, erect and large.
PSEB 7th Class Science Solutions Chapter 15 Light 2

PSEB 7th Class Science Solutions Chapter 15 Light

Question (ii)
A person is standing 5m away from a plane mirror. How far will his image be:
(a) from the mirror
(b) from the person himself ?
Solution:
We know that the image formed in a plane mirror is at the same distance behind the mirror is as the object is in front of the mirror. So,
(a) Distance of image from the mirror = Distance of person from the mirror
= 2 meters

(b) Distance of the image from the person = Distance of the person from the plane mirror + Image distance from the mirror. = 2 meters + 2 meters
∴ Distance of the image from the person = 4 meters

Question (iii)
Give two uses of concave mirrors.
Answer:
Uses of concave mirrors:

  • Concave mirror is used as a having mirror, as the concave mirror produces a large and erect image when the mirror is placed close to the face.
  • Concave mirrors are mostly used on the headlights of vehicles. Here the bulb (light source) is placed on the principal focus of the concave mirror.

Question (iv)
State two differences between convex lens and concave lens.
Answer:
Difference between convex lens and concave lens:

Convex lens Concave lens
(1) It is thick in the middle and thin at the edges. (1) It is thin in the middle and thick at the edges.
(2) It generally forms a large image of the object. (2) It forms a small and virtual image of the object.

Question (v)
Of how many colours is white light made of ? Name them.
Answer:
White light consists of seven colours. Their names are:

  1. Violet,
  2. Purple (Indigo),
  3. Blue,
  4. Green.
  5. Yellow,
  6. Orange and
  7. Red.

Question (vi)
Ravi is observing his image in a plane mirror. The distance between the mirror and his image is 6 m. If he moves 2 m towards the mirror, then the distance between Ravi and his image will be:
Answer:
Given, the distance between the plane mirror and the image = 6 meters
We know, the distance between the object (Ravi) and the mirror = Distance between the mirror and the image
Distance between Ravi and mirror = 6 meters (Given.)
PSEB 7th Class Science Solutions Chapter 15 Light 3
When he moves 2 meters forward then the distance between Ravi and mirror will be
= 6 meters – 2 meters
= 4 meters.
Now,
Distance between Ravi and his image = Distance between Ravi and Plane mirror + Distance between plane mirror and image
= 4 meters + 4 meters
= 8 meters

7. Long Answer Type Questions:

Question (i)
State and explain the characteristics of the image formed by a plane mirror.
Answer:
Characteristics of the image formed by the plane mirror:

  • The image of the burning candle (object) is seen behind the mirror at the same distance. Therefore the image formed by a plane mirror is always formed as far behind the mirror as the objects is in front of it.
  • Since the image of the candle behind the mirror cannot be obtained on the screen, therefore, The image formed by the mirror is always virtual.
  • When we place the candle upright the image formed is also upwards. This shows that the image formed by a plane mirror is erect.
  • When we compare the size of the candle and its image formed in a plane mirror, they are of the same size. This shows the size of the object and the size image formed by the plane mirror is equal.
  • The distance between the candle and the mirror is equal to the distance between the image of the candle and the minor.
  • The image formed by a plane mirror is laterally inverted. That is, the left side of the object appears to the right side of the image and the right side of the object is to the left side of the image.

Question (ii)
What is meant by dispersion of the light ? Explain by using a Prism. Which natural phenomenon is associated with dispersion of light ?
Answer:
PSEB 7th Class Science Solutions Chapter 15 Light 4
Dispersion of Light.
It is the phenomena of spliting the white light into its seven colours. The process of its separation into seven colors is characterized by a white ray of light passing through the prism as shown in the figure.

Place a white screen on the other side of prism. You will see that the white light will be splited in seven colors. These colors form a band of the seven colors received on the screen called the spectrum. Due to the different wavelengths of the seven colors, these seven colors diverge at different angles. These seven colors are: (1) Violet, (2) Indigo, (3) Blue, (4) Green, (5) Yellow, (6) Orange, (7) Red.

We can remember these names with the word VIBGYOR formed from their first letters. You may have seen rainbows forming in the sky after rain. It causes the rays of the sun’s white light to be dispersed from the water droplets hanging in the atmosphere. Here the water droplets act like a prism and split up the white sunlight into its seven colours.

PSEB 7th Class Science Solutions Chapter 15 Light

PSEB Solutions for Class 7 Science Light Important Questions and Answers

1. Fill in the Blanks:

(i) An image that cannot be obtained on a screen is called …………………..
Answer:
virtual image

(ii) Image formed by a convex …………………. is always virtual and smaller in size.
Answer:
mirror

(iii) An image formed by a ………………….. mirror is always of same size as that of an object.
Answer:
plane

(iv) An image which can be obtained on a screen is called a ………………. image
Answer:
real

(v) An image formed by a …………………. lens cannot be obtained on a screen.
Answer:
concave

2. Match the Column ‘A’ with Column ‘B’:

Column ‘A’ Column ‘B’
(i) Convex lens (a) Rainbow
(ii) Real, inverted and equal image (b) Concave mirror
(iii) Alphabetical process (c) Magnifying glass
(iv) Virtual image (d) Convex lens
(v) The reflecting surface is inward (e) Cannot be obtained on screen

Answer:

Column ‘A’ Column ‘B’
(i) Convex lens (c) Magnifying glass
(ii) Real, inverted and equal image (d) Convex lens
(iii) Alphabetical process (a) Rainbow
(iv) Virtual image (e) Cannot be obtained on screen
(v) The reflecting surface is inward (b) Concave mirror.

3. Choose the Correct Answer:

Question (i)
Light travels in:
(a) Straight lines
(b) Curved lines
(c) Circles
(d) None of the above.
Answer:
(a) Straight lines.

PSEB 7th Class Science Solutions Chapter 15 Light

Question (ii)
Erect, virtual and diminished image is formed in:
(a) plane mirror
(b) concave mirror convexo.
(c) convex mirror
(d) concave mirror
Answer:
(c) convex mirror.

Question (iii)
To see an object it is necessary:
(a) Source of light
(b) Source of light and an object
(c) Source of light, object and an eye
(d) None of these.
Answer:
(c) Source of light, object and an eye.

Question (iv)
After passing through a prism, light is split up into:
(a) two colours
(b) five colours
(c) seven colours
(d) six colours.
Answer:
(c) seven colours.

Question (v)
To see magnified view of teeth, dentists use:
(a) plane mirror
(b) concave mirror
(c) convex mirror and convex mirrors.
(d) combination of concave
Answer:
(b) concave mirror

Question (vi)
Which mirror is used to get magnified and real image ?
(a) convex mirror
(b) plane mirror
(c) concave mirror
(d) none of the above.
Answer:
(c) concave mirror.

Question (vii)
Convex lens is:
(a) thick at the centre and thin at the edges
(b) thick at the edges and thin at the centre
(c) uniformly thick
(d) irregularly thick.
Answer:
(a) thick at the centre and thin at the edges.

Question (viii)
When Newton disc is rotated fast which colour is seen ?
PSEB 7th Class Science Solutions Chapter 15 Light 5
(a) Black
(b) White
(c) Blue
(d) Yellow.
Answer:
(b) White.

PSEB 7th Class Science Solutions Chapter 15 Light

Very Short Answer Type Questions

Question 1.
Give one property of light.
Answer:
Light travels in a straight line.

Question 2.
Which surface acts as a mirror ?
Answer:
Any smooth and polished surface.

Question 3.
If you are standing in front of a plane mirror and observing your own image what is the relation
Answer:
Distance of the object from the mirror = Distance of the Image from the mirror.

Question 4.
What are spherical mirrors ?
Answer:
Spherical Mirrors. Spherical mirrors are the part of hollow spherical reflecting surface of which the mirror is a part. The spherical mirrors are of two types:

  1. Concave mirrors
  2. Convex mirrors.

Question 5.
One wants to get an enlarged image of an object in a mirror. What type of mirror should one use ?
Answer:
Concave mirror.

Question 6.
What type of mirror is used in automobiles for the benefit of drivers ?
Answer:
Convex mirror.

Question 7.
What type of mirrors are used in search-lights and head lights of cars ?
Answer:
Concave mirror.

PSEB 7th Class Science Solutions Chapter 15 Light

Question 8.
Name the mirror in which the image of object is always diminished and virtual.
Answer:
Convex mirror.

Question 9.
Name the kind of mirror which produces a diminished real image.
Answer:
Concave mirror.

Question 10.
Write a note on convex lens.
Answer:
PSEB 7th Class Science Solutions Chapter 15 Light 6
Convex lens.
A convex lens is thick in the centre and thin at the edges. This lens has the capability to converge a beam of light. So this lens is also called a converging lens.

Question 11.
What is a concave lens ?
Answer:
PSEB 7th Class Science Solutions Chapter 15 Light 7
Concave lens.
A concave lens is thin at the centre and thick at the edges. This lens has a capacity to diverge a beam of light. So this lens is also called a diverging lens.

Question 12.
Name the seven constituent colors of light.
Answer:
Violet, Indigo, Blue, Green, Yellow, Orange, Red.

Question 13.
Describe a natural phenomenon in which seven colors of light are displayed.
Answer:
View of the rainbow after rains.

Short Answer Type Qucstions

Question 1.
Why should not we see towards sun through a convex lens ?
Answer:
A convex lens is a converging lens. It converges a beam of parallel rays coming from the Sun at the focus. If a piece of paper or cloth is placed at the focus of a convex lens from the sun, these catch fire. So, if we see towards the sun through a convex lens, large amount of heat will be produced which is very harmful for the eyes. Hence we should not see the sun through a convex lens.

Question 2.
What is a virtual image ? Give one situation where a virtual image is formed.
Answer:
Virtual image. An image which cannot be obtained on a screen, is called a virtual image.
Image formed in a plane mirror is always virtual.
Image in a concave mirror is virtual when object is placed very close to the mirror.
Image formed in a convex mirror is always virtual.

PSEB 7th Class Science Solutions Chapter 15 Light

Question 3.
State two differences between a convex and a concave lens.
Answer:
Differences between a Convex and a Concave lens:

Convex lens Concave lens
1. It is thick at the centre and thin at the edges.

PSEB 7th Class Science Solutions Chapter 15 Light 8

It is thin at the centre and thick at the edges

PSEB 7th Class Science Solutions Chapter 15 Light 9

2. The image is generally formed on the other side of the lens (except when the object is between F and optical centre). The image is formed on the same side of the object.
3. It converges a beam of light to a It diverges a beam of light as coming from a point.

Question 4.
Give one use each of a concave and a convex mirror.
Answer:
Use of concave mirror. It is used as reflector in a searchlight or car head-light.
Use of convex mirror. It is used in cars and other vehicles as a rear view mirror.

Question 5.
Which type of mirror can form a real image ?
Answer:
A concave mirror forms a real image.

Question 6.
Which type of lens forms always a virtual image ?
Answer:
Concave lens.

Question 7.
Give the conditions necessary for seeing an object.
Answer:
Conditions for seeing an object. To see an object the following three conditions are required to be satisfied:

  1. Source of light to make the object visible.
  2. The object.
  3. Eye.

Question 8.
What are the uses of mirrors ?
Answer:
Uses of Mirrors. We use mirrors in our daily life for one or the other purpose.
(i) Plane Mirror. Plane mirrors are used in the barber’s shops and in homes as looking glass. It is also used in periscope and other optical instruments.

(ii) Concave mirror.

  1. It is used as reflector in a search light or in a car head light.
  2. It is used in the solar cookers to converge the radiations coming from the sun.

(iii) Convex mirror.

  1. It is used in the cars and other vehicles as a rear view mirror to have look at the vehicles coming behind.
  2. It is used in amusement parks for showing strange looking images of people who stand in front of them.

Long Answer Type Question

Question 1.
Give an experiment to show that white light is made up of seven colours.
Answer:
PSEB 7th Class Science Solutions Chapter 15 Light 10
White light is a mixture of seven colours. To prove that white light is a mixture of seven colours, the following activity is performed.

Make a small top with a rotating disc. Paint the upper surface of the disc with sectorial area proportionately to the seven colours of the rainbow. Now rotate the disc when a white colour will appear on the disc. Light helps us to see the objects around us.

PSEB 7th Class Science Solutions Chapter 10 Respiration in Organisms

Punjab State Board PSEB 7th Class Science Book Solutions Chapter 10 Respiration in Organisms Textbook Exercise Questions and Answers.

PSEB Solutions for Class 7 Science Chapter 10 Respiration in Organisms

Science Guide for Class 7 PSEB Respiration in Organisms Intext Questions and Answers

Think and Answer (Textbook Page No. 117)

Question 1.
How long were you able to hold your breath?
Answer:
Up to 35 seconds.

Question 2.
Why can we not hold our breath for a long time?
Answer:
We need oxygen all the time within our body, by holding breath for too long the amount of Carbon dioxide will increase which can be fatal.

PSEB 7th Class Science Solutions Chapter 10 Respiration in Organisms

Think and answer (Textbook Page No. 118)

Question 1.
In which condition the rate of breathing is slowest ?
Answer:
After resting, the respiratory rate is at least 12 to 20 breaths per minute. A lower rate is a sign of a physical problem.

Question 2.
What is your normal breathing rate ?
Answer:
20 breaths per minute.

Think and Answer (Textbook Page No. 121)

Question 1.
What does the rubber sheet represent ?
Answer:
The Diaphragm represents the rubber seat.

Question 2.
Which organs are represented by balloons ?
Answer:
The two lungs represent the balloons.

Question 3.
Can you explain the mechanism of breathing with the help of this model ?
Answer:
Yes, because it is working model of breathing. Therefore, this will explain that action completely.

Think and Answer (Textbook Page No. 118)

Question 1.
Why does lime water turn milky ?
Answer:
When we blow in lime water the exhaled carbon dioxide reacts with lime water to make lime water milky.

Question 2.
What is the formula of lime water ?
Answer:
Chemical formula of Lime water: Ca(OH)2

PSEB 7th Class Science Solutions Chapter 10 Respiration in Organisms

PSEB 7th Class Science Guide Respiration in Organisms Textbook Questions and Answers

1. Fill in the Blanks:

(i) Lactic acid is produced during ………………….. respiration.
Answer:
Aerobic

(ii) Taking in of air rich in oxygen is called ………………… .
Answer:
Breathing

(iii) The number of times a person breathes in a minute is termed as ……………………. .
Answer:
Breathing rate

(iv) Exchange of gases in the leaves of plants takes place through ……………….. .
Answer:
Stomata

(v) The skin of an earthworm is …………….. to touch.
Answer:
Wet and slippery

2. State True or False:

(i) Frogs breathe through their skin as well as lungs.
Answer:
True

(ii) We cannot feel breathing movements in our body.
Answer:
False

(iii) Aerobic respiration produces more energy than anaerobic respiration.
Answer:
True

PSEB 7th Class Science Solutions Chapter 10 Respiration in Organisms

(iv) During heavy exercise the breathing rate of a person slows down.
Answer:
True

(v) Insects have organ, called trachea for respiration.
Answer:
True

3. Match the Column ‘A’ with Column ‘B’:

Column ‘A’ Column ‘B’
(i) Lenticels (a) Gills
(ii) Yeast (b) Old stem
(iii) Fish (c) Skin
(iv) Stomata (d) Alcohol
(v) Earthworm (e) Leaves

Answer:

Column ‘A’ Column ‘B’
(i) Lenticels (b) Old stem
(ii) Yeast (d) Alcohol
(iii) Fish (a) Gills
(iv) Stomata (e) Leaves
(v) Earthworm (c) Skin

4. Choose the Correct Answer:

Question (i)
The earthworms respire through:
(a) Trachea
(b) Gills
(c) Lungs
(d) Skin.
Answer:
(d) Skin

Question (ii)
Respiration helps in:
(a) Digestion
(b) Energy production
(c) Locomotion
(d) Chromosomes.
Answer:
(b) Energy production.

Question (iii)
In cockroaches, air enters the body through:
(a) Skin
(b) Lungs
(c) Spiracles
(d) Gills.
Answer:
(c) Spiracles.

Question (iv)
In old and woody stem gaseous exchange take place through:
(a) Stomata
(b) Lenticels
(c) Root hair
(d) Do not respire.
Answer:
(b) Lenticels.

PSEB 7th Class Science Solutions Chapter 10 Respiration in Organisms

Question (v)
During heavy exercise we get cramps due to:
(a) Glucose
(b) Oxygen
(c) Lactic acid
(d) Alcohol.
Answer:
(c) Lactic acid.

5. Very Short Answer Type Questions:

Question (i)
Define the term breathing rate.
Answer:
Breathing Rate. The number of times a person breathes in a minute, is called the breathing rate. Breathing once means inhaling once and exhaling once.

Question (ii)
What is respiration ? Name two types of respiration.
Answer:
Respiration. This is a simple physical activity during which oxygen-rich air from the atmosphere is drawn into the respiratory organs (lungs in humans). This part of the respiratory system is called breathing and after breathing, carbon dioxide-rich air is expelled from the respiratory tract into the atmosphere.
There are two types of respirations:

  1. Aerobic respiration.
  2. Anaerobic respiration.

6. Short Answer Type Questions:

Question (i)
Why do we get muscle cramps after heavy excercise ?
Answer:
After exercise we feel tired due to Anaerobic respiration. In the absence of oxygen, lactic acid is formed due to the partial oxidation of glucose. Lactic acid builds up in the muscles causing fatigue and stiffness.

Question (ii)
Why does an over watered potted plant die ?
Answer:
When we water the plants more than what plants need, they die. This is because more water fills the air spaces between the soil particles. As a result, the roots of the plants do not get enough oxygen.

Question (iii)
Why do we often sneeze when we inhale a lot of dust-laden air ?
Answer:
When we inhale in a dusty environment, the unwanted dust particles get trapped in the nasal passage, nasal hair and mucus causing irritation or itching in the nose which makes us sneeze. With the onset of sneezing, those unnecessary dust particles are expelled and clean air begins to enter our lungs.

7. Long Answer Type Questions:

Question (i)
How respiration is different from breathing ?
Answer:
Differences between Respiratory and Breathing.

Respiration Breathing
(1) This action takes place in cells. (1) This action takes place outside the cells.
(2) Energy is produced in this action. (2) This action does not produce energy.
(3) It is a chemical reaction. (3) It is a physical activity in which gases are exchanged.
(4) Respiratory organs are not required in this activity. (4) The respiratory organs (lungs) are required.
(5) It requires enzymes. (5) Enzymes are not required in this activity.
(6) This action produces carbon dioxide and energy. (6) It releases carbon dioxide.
(7) It involves oxidation of glucose. (7) It draws in oxygen.

PSEB 7th Class Science Solutions Chapter 10 Respiration in Organisms

Question (ii)
Draw a labelled diagram of human respiratory system.
Answer:
Labelled diagram of human Respiratory System:
PSEB 7th Class Science Solutions Chapter 10 Respiration in Organisms 1

Question (iii)
List similarities and differences between aerobic and anaerobic respiration.
Answer:
Difference between Aerobic respiration and Anaerobic respiration :

Aerobic Respiration Anaerobic Respiration
(1) This action occurs in the presence of oxygen. (1) This action takes place in the absence of oxygen.
(2) This action takes place in both the biological fluid and the mitochondria biological fluid. (2) This action takes place only in the of the cells.
(3) In aerobic respiration, complete oxidation of glucose occurs. (3) In anaerobic respiration incomplete oxidation of glucose takes place.
(4) In this action CO2 and water are formed. (4) Alcohol and carbon dioxide are formed in this process.
(5) In this action from a molecule of glucose 38 ATP molecules are free. (5) From a molecule of glucose in this action 2 ATP molecules are free.
(6) Complete oxidation of one molecule of glucose releases 673 kcal of energy. (6) Partial oxidation of one molecule of glucose releasing 21 kilo calorie of energy.

PSEB Solutions for Class 7 Science Respiration in Organisms Important Questions and Answers

1. Fill in the Blanks:

(i) Organisms that do not require oxygen for respiration are called ………………..
Answer:
Anaerobic organisms

(ii) Accumulation of ………………….. causes stiffness in muscles.
Answer:
Lactic acid

(iii) Our breathing rate ………………… when we do exercise or work hard.
Answer:
Increases

(iv) The leaves of plants use ……………….. for the exchange of gases.
Answer:
Stomata

(v) Fishes breathe through …………………..
Answer:
Gills

PSEB 7th Class Science Solutions Chapter 10 Respiration in Organisms

2. Match the Column ‘I’ with Column ‘II’:

Column ‘I’ Column ‘II’
(a) Yeast (i) Earthworm
(b) Diaphragm (ii) Gills
(c) Skin (iii) Alcohol
(d) Leaves (iv) Chest Cavity
(e) Fish (v) Stomata
(f) Frog (vi) Lungs and skin

Answer:

Column ‘I’ Column ‘II’
(a) Yeast (iii) Alcohol
(b) Diaphragm (iv) Chest Cavity
(c) Skin (i) Earthworm
(d) Leaves (v) Stomata
(e) Fish (vi) Gills
(f) Frog (vii) Lungs and skin

3. Choose the Correct Answer:

Question (i)
Which one of the following is an anaerobic organism ?
(a) Cow
(b) Yeast
(c) Frog
(d) Butterfly.
Answer:
(b) Yeast.

Question (ii)
The percentage of CO2 in exhaled air is:
(a) 0.4%
(b) 4%
(c) 4.4%
(d) 14.4%.
Answer:
(c) 4.4%.

Question (iii)
The products of anaerobic respiration are:
(a) Carbohydrate and O2
(b) Ethylalcohol and CO2
(c) Carbohydrate and CO2
(d) Ethylalcohol and O2
Answer:
(b) Ethylalcohol and CO2

Question (iv)
Respiratory organs of fish are:
(a) Skin
(b) Lungs
(c) Gills
(d) Stomata.
Answer:
(c) Gills.

Question (v)
Plants carry out photosynthesis only during:
(a) Night
(b) Day
(c) Day and Night
(d) None of these.
Answer:
(b) Day

Question (vi)
Respiratory organs of frog are:
(a) Lungs and Skin
(b) Gills
(c) Only skin
(d) None of these.
Answer:
(a) Lungs and Skin.

PSEB 7th Class Science Solutions Chapter 10 Respiration in Organisms

Question (vii)
The Vital biological system of organisms is:
(a) Digestion
(b) Reproduction
(c) Excretion
(d) Respiration.
Answer:
(d) Respiration.

Question (viii)
Which organism uses more than one organ for respiration?
(a) Fish
(b) Cockroach
(c) Human
(d) Frog.
Answer:
(d) Frog.

Question (ix)
Air enters ¡n the body of cockroach:
(a) Through lungs
(b) Through gilds
(e) Through spricales
(d) Through skin.
Answer:
(e) Through spricals.

4. State True or False:

(i) During heavy exercise the breathing rate of a person slows down.
Answer:
False

(ii) Plants carry out photosynthesis only during the day and respiration only at night.
Answer:
False

(iii) Frogs breathe through their apart from skin.
Answer:
True

(iv) The fishes have lungs for respiration.
Answer:
False

(v) The size of the chest cavity increases during inhalation.
Answer:
True

PSEB 7th Class Science Solutions Chapter 10 Respiration in Organisms

Very Short Answer Type Qucstions

Question 1.
Name the energy giving processes.
Answer:
Nutrition and respiration.

Question 2.
What are the end products of aerobic respiration ?
Answer:
Carbon dioxide, water and energy.

Question 3.
What are the end products of anaerobic respiration ?
Answer:
Ethyl alcohol (C2H5OH) and carbon dioxide (CO2).

Question 4.
Define breathing.
Answer:
Breathing. The process by which organisms take oxygen from environment and release carbon dioxide, is called breathing.

Question 5.
What are the two main processes in respiration ?
Answer:
The two main processes in respiration are:
(i) Breathing i.e. taking in O2 and giving out CO2.
(ii) Using O2 in the cells (internal respiration).

Question 6.
What are anaerobes ?
Answer:
Anaerobes. Organisms which can survive in absence of free air are called anaerobes.

Question 7.
Give an example of anaerobe.
Answer:
Yeast.

PSEB 7th Class Science Solutions Chapter 10 Respiration in Organisms

Question 8.
What is cellular respiration ?
Answer:
Cellular respiration. Respiration taking place in living cells is called cellular respiration.

Question 9.
Which functions of cell need energy ?
Answer:
Nutrition, transport, excretion, reproduction.

Question 10.
What is the reason of cramps in legs ?
Answer:
Formation of lactic acid.

Question 11.
How can the muscles of legs be relieved ?
Answer:
By massaging or taking hot water bath.

Question 12.
When does breathing rate increase ?
Answer:
During exercise or running.

Question 13.
What is diaphragm ?
Answer:
Diaphragm. It is a large muscular sheet forming the floor of chest cavity.

Question 14.
What happens to chest cavity during inhalation ?
Answer:
During inhalation, the space in chest cavity increases.

Question 15.
When does the space in chest cavity decrease ?
Answer:
During exhalation.

Short Answer Type Questions

Question 1.
What is anaerobic respiration ?
Answer:
Anaerobic respiration. Some cells like bacteria and yeast release energy by breaking down glucose into ethyl alcohol and CO2 in the absence of oxygen. This process is called anaerobic respiration.

PSEB 7th Class Science Solutions Chapter 10 Respiration in Organisms

Question 2.
What are stomata ? Give two functions of stomata.
Answer:
Stomata. These are the small holes (pores) present on the lower surface of leaves. It is guarded by two kidney-shaped guard cells. The light affects its opening.
Functions. (i) Exchange of gases, (ii) Control of transpiration.

Question 3.
Explain respiration in plants.
Answer:
Respiration in plants. Plants, during the process of photosynthesis, give off oxygen which is utilized during respiration.
Stomata are the openings located on the lower surface of the leaves which are guarded by two kidney-shaped guard cells. Through stomatal opening exchange of gases takes place.

Question 4.
Is respiration the same as breathing ?
Answer:
Resiration and breathing are not the same processes. During respiration oxidation of food occurs along with the release of energy. It is purely a chemical process. Breathing is purely a physical process. It mainly occurs by inhalation and exhalation. In breathing simply exchange of gases occurs, where O2 is drawn in and carbon dioxide is thrown out.

Question 5.
Give chemical equation for Aerobic respiration.
Answer:
Glucose + Oxygen → Carbon dioxide + Water + energy.
C6H12O6 + 6O2 → 6CO2 + 6H2O + Energy

Question 6.
Give an account of movement of ribs during inhalation and exhalation processes.
Answer:
Movement of Ribs

  1. During inhalation. Ribs move up and outwards to increase space in chest cavity.
  2. During exhalation. Ribs move down and inwards to decrease space in chest cavity.

Question 7.
Describe the importance of respiration in plants. .
Answer:
Importance of respiration in plants. During respiration the energy rich foodstuffs (glucose and fructose) are changed into water and carbon dioxide accompanied by the release of usable energy which is necessary for the sustenance of plant life. The carbon dioxide so released is made use of in the manufacture of food by the plant during the process of photosynthesis.

Question 8.
Give an account of respiration in fishes.
Answer:
Respiration in fishes. Fishes live in water and breathe through gills which is their breathing organ. Fishes take in water through their mouth and force is out through the gills. In gills water and blood flow in opposite direction to increase diffusion of oxygen.
PSEB 7th Class Science Solutions Chapter 10 Respiration in Organisms 2

Long Answer Type Question

Question 1.
Show by an experiment that CO2 is present in the exhaled air.
Answer:
PSEB 7th Class Science Solutions Chapter 10 Respiration in Organisms 3
We can prove by the following experiment that CO2 is present in the exhaled air:
Experiment. Set up the apparatus as shown in the figure. Exhale air through your mouth into the tube provided for this purpose. You will notice that the lime water is kept in test B. Through which exhaled air is passing has turned milky.

On the other hand, test tube A through which exhaled air is not passing has shown slight milkiness due to atmosphere air entering from the side tube. It proves that carbon dioxide is present in exhaled air which has turned lime water present in test tube B milky and milkiness is due to the formation of calcium carbonate in the figure.
PSEB 7th Class Science Solutions Chapter 10 Respiration in Organisms 4

PSEB 7th Class Science Solutions Chapter 11 Transportation in Animals and Plants

Punjab State Board PSEB 7th Class Science Book Solutions Chapter 11 Transportation in Animals and Plants Textbook Exercise Questions and Answers.

PSEB Solutions for Class 7 Science Chapter 11 Transportation in Animals and Plants

Science Guide for Class 7 PSEB Transportation in Animals and Plants Intext Questions and Answers

Think and Answer (Textbook Page No. 131)

Question 1.
What is pulse rate ?
Answer:
Pulse rate. The number of times a person’s heart beats per minute, called pulse rate.

Question 2.
Where can we feel the pulse ?
Answer:
We can feel the pulse on the neck, behind the knee and near the ankle and wrist joints.

PSEB 7th Class Science Solutions Chapter 11 Transportation in Animals and Plants

Think and Answer (Textbook Page No. 134)

Question 1.
What is a stethoscope ?
Answer:
Stethoscope. Doctors use a stethoscope to hear the sounds of the heart and lungs inside the patient’s body while examining his condition. The stethoscope has a chest piece at one end and an ear piece at the other end. The two pieces are connected by a rubber tube.

Question 2.
Is there any relationship between heart beat and pulse rate ?
Answer:
Both the pulse rate and the heart rate are the same because the contraction of the heart increases the blood pressure in the arteries which is detected by the pulse rate. Therefore, a pulse test is a direct measure of the heart rate.

Think and Answer (Textbook Page No. 137)

Question 1.
Define osmosis.
Answer:
Osmosis. This is the process by which a solvent passes through a semi-permeable membrane from a low-concentration solution to a solution of high concentration so that the concentration of solutions on both sides of the membrane become equal.

Question 2.
Define semi-permeable membrane.
Answer:
Semi-permeable membrane. It is a type of organic or organic polymer membrane through which some molecules or ions (charged particles) can pass through diffusion.

PSEB 7th Class Science Guide Transportation in Animals and Plants Textbook Questions and Answers

1. Fill in the Blanks:

(i) In plants, water and minerals are transported by ………………. .
Answer:
Roots

(ii) Doctors use …………………. to listen the internal sounds of the body.
Answer:
stethoscope

(iii) Sweat contains water and …………………
Answer:
salts

PSEB 7th Class Science Solutions Chapter 11 Transportation in Animals and Plants

(iv) The blood vessels having thick elastic walls are called ………………….
Answer:
artery

(v) The rhythmic contraction and expansion of heart is called …………………..
Answer:
heartbeat

2. State True or False:

(i) Phloem vessels transport food materials in plants.
Answer:
False

(ii) Deoxygenated blood is carried back to heart by veins.
Answer:
True

(iii) The veins have thick walls.
Answer:
True

(iv) Blood plasma is the solid component of blood.
Answer:
False

(v) The red colour of blood is due to the presence of plasma.
Answer:
False

3. Match the Column ‘A’ with Column ‘B’:

Column ‘A’ Column ‘B’
(i) Transport of water (a) Stomata
(ii) Red in colour (b) Xylem
(iii) Exchange of gases (c) Haemoglobin
(iv) Blood clotting (d) Phloem
(v) Transport of food (e) Platelets

 Answer:

Column ‘A’ Column ‘B’
(i) Transport of water (b) Xylem
(ii) Red in colour (c) Haemoglobin
(iii) Exchange of gases (a) Stomata
(iv) Blood clotting (e) Platelets
(v) Transport of food (d) Phloem

PSEB 7th Class Science Solutions Chapter 11 Transportation in Animals and Plants

4. Choose the Correct Answer:

Question (i)
Blood cells responsible for clotting are:
(a) Plasma
(b) WBC’s
(c) RBC’s
(d) Platelets
Answer:
(d) Platelets.

Question (ii)
The lower chambers of heart are called:
(a) Atria
(b) Valves
(c) Veins
(d) Ventricles
Answer:
(b) Valves.

Question (iii)
The excretory system consists of:
(a) Kidney
(b) Bladder
(c) Urethra
(d) All of these.
Answer:
(d) All of these.

Question (iv)
The muscular organ which beats continuously to act as a pump
(a) Auricles
(b) Kidney
(c) Heart
(d) Veins.
Answer:
(c) Heart.

Question (v)
Blood contains:
(a) Plasma
(b) WBC’s
(c) RBC’s
(d) All of these.
Answer:
(d) All of these.

5. Very Short Answer Type Questions:

Question (i)
Why is blood red in colour ?
Answer:
Red colour of blood is due to a pigment called haemoglobin which is a protein. It combines with iron molecules to form a complex compound and carries oxygen to different parts of the body. Due to the high amount of iron in it, it reflects the red color, which makes the colour of blood red.

Question (ii)
Define translocation.
Answer:
Translocation. The process of transmitting food materials from the leaves to other parts of the plant is called translocation.

PSEB 7th Class Science Solutions Chapter 11 Transportation in Animals and Plants

Question (iii)
What is dialysis ?
Answer:
Dialysis. If a person’s both kidneys are damaged, the blood does not get filtered properly, causing harmful solids and fluid to pile up in the body. Such person cannot live long unless his blood is filtered regularly through an artificial kidney. The process of removing toxins from the blood with the help of a machine (artificial kidney), is called dialysis.

6. Short Answer Type Questions:

Question (i)
State three functions of blood.
Answer:
Functions of blood:

  1. Oxygenated blood transfers nutrients to the lungs and tissues.
  2. The blood carries the waste products to the kidneys.
  3. The blood carries antibodies to fight infection.
  4. Blood controls body temperature.

Question (ii)
Name the parts of excretory system in humans.
Answer:
Parts of Excretory System in humans. The following are the main components of the humipi excretion system :

  1. Kidneys
  2. Ureters
  3. Urinary bladder
  4. Urethra.

Question (iii)
Why do veins have valves ?
Answer:
The main function of the valves in the veins is to stop the blood from coming back because they have low blood pressure. That is, it is ensured that the blood is flowing in one direction. The valves in the veins help the blood to flow to the heart in the opposite direction of gravity.

7. Long Answer Type Questions:

Question (i)
Write and explain the components of blood.
Answer:
Components of Blood. Blood is a fluid connective tissue, made up of four main components :
(1) Red blood cells,
(2) White blood cells,
(3) Platelets and
(4) Plasma.

(1) Red blood cells (R.B.C.). These contain proteins called haemoglobin which carry oxygen and carbon dioxide in the respiration process.

(2) White Blood Cells (W.B.C.). They destroy harmful bacteria and dead cells from the body and protects from infection.

(3) Platelets. They help build blood clotting. Thus stop the loss of precious blood.

(4) Plasma. It is also part of the blood, which contains proteins, hormones, glucose, fatty acids, amino acids, mineral salts, digestible and excretory substances. It is a major component of blood.

Question (ii)
Describe the function of Heart.
Answer:
PSEB 7th Class Science Solutions Chapter 11 Transportation in Animals and Plants 1
Function of the Heart. The heart is an organ which beats continuously to act as a pump for the transportation of blood. The arteries receive oxygenated blood from the heart and supply it throughout the body. Whereas, the veins carry the deoxygenated blood from the body parts to the heart for oxygenation.

The right atrium receives blood from veins and pumps it to the right ventricle.
The right ventricle pumps the blood received from the right atrium to the lungs.
The left atrium receives oxygenated blood from the lungs and pumps it to the left ventricle. The left ventricle pumps the oxygenated blood throughout the body.
The valves in the heart allow blood to flow in only one direction and prevent the blood from flowing backwards.

Question (iii)
Draw a labelled diagram of excretory system.
Answer:
Diagram of Human Excretary System.
PSEB 7th Class Science Solutions Chapter 11 Transportation in Animals and Plants 2

PSEB 7th Class Science Solutions Chapter 11 Transportation in Animals and Plants

Question (iv)
Differentiate between Arteries and Veins.
Answer:
Differences between the Arteries and Veins:

Arteries Veins
(1) The arteries carry blood from the heart to different parts of the body. (1) Veins collect blood from different parts of the body and carry it to the heart.
(2) They do not have valves. (2) They have valves.
(3) Their walls are thick. (3) Their walls are thin.
(4) All the arteries except the pulmonary artery carry pure blood. (4) Veins other than lung veins carry impure blood containing Carbon dioxide.
(5) These are present deep under the skin. (5) These are present at shallow depths under the skin
(6) Blood flow is fast and jerky. (6) Blood flow is slow.

Question (v)
Explain the transportation of substances in plants.
Answer:
PSEB 7th Class Science Solutions Chapter 11 Transportation in Animals and Plants 3
Transport of substances in plants. Plants take water and carbon dioxide present in the atmosphere to prepare their food with the help of chlorophyll in the presence of sunlight. Water and mineral salts are absorbed by the roots and transported to the leaves where photosynthesis takes place.

Transport of water and minerals in plants. Plants get water and minerals from the soil. This is usually done by the roots. The roots have root hairs which increase the surface area of the roots which helps the roots to absorb water and the minerals dissolved in it. The emission of water in the leaves creates a force of attraction which helps water and nutrients to reach the top of plant. Plants have pipe-like vessels to transport water and nutrients from the soil. Veins are made up of a special type of dead cell called a Xylem.

Transportation of Food. Food produced by photosynthesis in plant leaves needs to be transported to every part of the plant. The tissue responsible for transporting food to plants is called the Phloem. The phloem carries the glucose produced in the leaves to all parts of the plant. The process of transfer of food prepared in the leaves to other parts of the plant is called transport.

PSEB Solutions for Class 7 Science Transportation in Animals and Plants Important Questions and Answers

1. Fill in the Blanks:

(i) The blood from heart is transported to all parts of the body by …………….. .
Answer:
Arteries

(ii) Haemoglobin is present in ………………. cells.
Answer:
Red blood

(iii) Arteries and veins are joined by a network of ……………………….
Answer:
Capillaries

(iv) The rhythmic expansion and contraction of heart is called ………………….
Answer:
Heart beat

(v) The main excretory product in human beings is ……………….. .
Answer:
Urine

PSEB 7th Class Science Solutions Chapter 11 Transportation in Animals and Plants

(vi) Sweat contains water and ………………….
Answer:
Salts

(vii) Kidneys eliminate the waste materials in the liquid form called ………………. .
Answer:
Urine

(viii) Water reaches great height in the trees because of sunction pull caused by …………………….. .
Answer:
transpiration

2. Match the Column T with Column ‘II’:

Column ‘I’ Column ‘II’
(i) Stomata (a) Absorption of water
(ii) Xylem (b) Transpiration
(iii) Root hairs (c) Transport of food
(iv) Phloem (d) Transport of water

 Answer:

Column ‘I’ Column ‘II’
(i) Stomata (b) Transpiration
(ii) Xylem (d) Transport of water
(iii) Root hairs (a) Absorption of water
(iv) Phloem (c) Transport of food.

3. Choose the Correct Answer:

Question (i)
How many chambers are there in human heart ?
(a) One
(b) Two
(c) Three
(d) Four.
Answer:
(d) Four.

Question (ii)
Name the instrument used to measure heart beat.
(a) Stethoscope
(b) Horoscope
(c) Microscope
(d) Telescope.
Answer:
(a) Stethoscope.

Question (iii)
Which is excretory organ of man ?
(a) Lung
(b) Kidney
(c) Stomach
(d) Heart.
Answer:
(b) Kidney.

PSEB 7th Class Science Solutions Chapter 11 Transportation in Animals and Plants

Question (iv)
What are the components of blood ?
(a) R.B.C.
(b) W.B.C.
(c) Blood platelets
(d) All of the above.
Answer:
(d) All of the above.

Question (v)
What is heart beat rate per minute of a healthy human being ?
(a) 72-80
(b) 52-60
(c) 92-100
(d) 62-70.
Answer:
(a) 72-80.

Question (vi)
Which of the following is not a part of excretory system ?
(a) Kidney
(b) Lungs
(c) Urinary bladder
(d) Urethra.
Answer:
(b) Lungs.

4. State True or False:

(i) The transport of substances in Spirogyra occurs by diffusion method.
Answer:
True

(ii) Platelets are not required for blood clotting.
Answer:
False

(iii) Emissions in Hydra are not by diffusion method.
Answer:
False

(iv) Xylem and phloem are vascular tissues.
Answer:
True

PSEB 7th Class Science Solutions Chapter 11 Transportation in Animals and Plants

Very Short Answer Type Questions

Question 1.
What are the main conducting tissues in plants ?
Answer:
Xylem and phloem are the main conducting tissues of plants.

Question 2.
What is the function of valves in heart ?
Answer:
Valves present in heart allow one way flow of blood.

Question 3.
Name the procedure used in the working of an artificial kidney.
Answer:
Haemodialysis.

Question 4.
To which part of body is urine carried through ureter ?
Answer:
Urinary bladder.

Question 5.
What is Urethra ?
Answer:
Urethra. It is a muscular tube which carries urine from urinary bladder to outside through the opening at its end.

Question 6.
Name the substance which is excreted by lungs.
Answer:
Carbon dioxide.

Question 7.
What is dialysis ?
Answer:
Dialysis. The process of removing waste products form blood using artificial kidney in place of natural kidney, is called dialysis.

PSEB 7th Class Science Solutions Chapter 11 Transportation in Animals and Plants

Question 8.
What is transpiration ?
Answer:
Transpiration. The loss of water in the form of water vapours from the surface of leaves is called transpiration.

Question 9.
What red pigment is present in red blood cells ?
Answer:
Haemoglobin.

Short Answer Type Questions

Question 1.
What are capillaries ? Give their functions.
Answer:
Capillaries. They are blood vessels present in the terminals of artery and vein. They are thin walled and extremely narrow tubes. Exchange of food materials, gases, w ater, hormones etc. take place across the thin walls of capillaries.

Question 2.
Name the parts of the human circulatory system.
Answer:
The circulatory system of the human body consists of:

  1. Heart, centrally located pump.
  2. Blood, liquid tissue.
  3. Arteries. Blood carrying tubes from the heart to different body parts.
  4. Veins. Blood bringing tubes from different body parts to the heart.
  5. Capillaries. Union of arteries and veins.

Question 3.
What are heart beat and pulse rate ?
Answer:
Heart beat. A heart beat consists of one auricular systole, one ventricular systole and then a short pause. At rest, human heart beats 72 times per minute. It can be listened with the help of stethoscope.

Pulse rate. When the ventricles contract, the blood is forced into the aorta and exerts the pressure on the wall of the aorta. The pressure difference between systole (about 120 mm Hg) and diastole (about 80 mm Hg) is known as pulse pressure (about 40 mm Hg). This blood pressure is expressed as 120/ 80. The heart beats 72 times per minute is referred to as the pulse rate.

Question 4.
Give reasons:
(i) Veins have valves at intervals in their inner lining whereas the arteries do not have valves.
(ii) The wall of the ventricles is thicker than that of the auricles.
(iii) The blood from the right ventricle enters the pulmonary artery, but cannot go back from the pulmonary artery to the right ventricle.
(iv) The left auricle contains oxygenated blood.
(v) The red blood corpuscles cannot divide.
(vi) Pulmonary artery contains deoxygenated blood.
(vii) Auricles are thin walled chambers.
(viii) Left ventricle is much thicker and muscular than the right ventricle of the heart.
Answer:
(i) Veins are thin walled and collapsible. Their lumen is comparatively wide. They take deoxygenated blood from various parts of the body back to heart. To prevent the backflow of blood, valves are present at intervals.

Arteries are thick walled and non-collapsible. Their lumen is narrow. As the blood in arteries flows with jerks the latter do not have valves.

(ii) Since blood is supplied to different organs of the body by ventricles, their wall is thicker than those of auricles because a thick wall exerts more pressure on the blood.

(iii) The opening of right ventricle into the pulmonary artery is guarded by semilunar valves which allow the flow of blood from the right ventricle into the pulmonary artery, but not in the reverse direction. Hence blood from the right ventricle enters the pulmonary artery, but cannot go back from pulmonary artery to right ventricle.

(iv) The left auricle contains oxygenated blood, because it receives blood from the lungs where blood is oxygenated.

(v) The red blood corpuscles cannot divide because they lack nuclei.

(vi) Pulmonary artery carries deoxygenated blood from the right ventricle to the lungs for oxygenation.

(vii) Auricles are collecting chambers for the blood, so they are thin walled to accommodate large volume of blood.

(viii) Left ventricle has to pump blood all over the body, under pressure, through the dorsal aorta. Hence, more muscular.

Question 5.
Name the different organs of excretory system.
Answer:
Different organs of excretory system:

  1. Kidney
  2. Ureter
  3. Urinary bladder
  4. Urethra
  5. Urinary opening.

PSEB 7th Class Science Solutions Chapter 11 Transportation in Animals and Plants

Question 6.
Why is transportation of food materials necessary in plants ?
Answer:
Necessity of transportation of food materials. Each and every part of plant needs food for obtaining energy, growth and maintaining body. As the food is prepared in the leaves and water is absorbed by roots from the soil, so, it is necessary to transport the food materials in plants.

Question 7.
Why is transport of materials necessary in plant or an animal ? Explain.
Answer:
Transportation of materials in plants and animals is necessary as each and every part of organism need food for obtaining energy and building and maintaining body. As the food is prepared in leaves and water is absorbed by roots in plants and absorbed by digestive system in living organisms. So it is necessary to transport the materials in the plants and animals.

Question 8.
What will happen if there are no platelets in the blood ?
Answer:
Platelets help in clotting of blood. So, in absence of platelets, blood will not clot. So, if a person gets injured once, the whole blood will flow out and hence a person may die.

Question 9.
What are components of blood ?
Answer:
Components of blood are:

  1. Fluid matrix called plasma.
  2. Red blood corpuscles (RBC)
  3. White blood corpuscles (WBC)
  4. Blood Platelets.

Question 10.
Why is blood needed by all parts of a body ?
Answer:
Need of blood:

  1. It transports oxygen and carbon dioxide.
  2. It helps in clotting.
  3. It carries nutritive and waste materials, enzymes and hormones etc.
  4. It helps in excretion of wastes.

Question 11.
What makes the blood look red ?
Answer:
Blood is red in colour due to presence of a pigment, haemoglobin in red blood corpuscles.

Question 12.
Describe the function of the heart.
Answer:
Functions of the heart :
The main function of heart is to pump blood to various parts of the body through blood
vessels.

The heart receives blood from the veins and pumps it to arteries. During relaxation both the atria get filled with blood. The left atrium is filled with oxygenated blood and right atrium gets filled with deoxygenated blood collected from different parts of the body.

When atria contracts, the valves open. As a result of this the oxygenated blood enters from the left atrium into the left ventricle while deoxygenated blood from right atrium enters into right ventricle.

When the ventricles contract, the valves get closed. Owing to it, the oxygenated blood is supplied to different parts of the body and deoxygenated blood is carried to lungs for purification.

PSEB 7th Class Science Solutions Chapter 11 Transportation in Animals and Plants

Question 13.
Why is it necessary to excrete waste products ?
Answer:
Necessity to excrete waste products. As a result of various functions of cells, number of waste materials are formed in the body. Accumulation of these waste products may become toxic. So, these must be removed from the body as soon as these are formed.

Question 14.
Differentiate between Heart beat and Pulse rate.
Answer:
Differences between Heart beat and Pulse rate

Heart beat Pulse Rate
(i) It is the rhythmic contraction and relaxation of heart. (i) It is the rhythmic contraction and relaxation in aorta and its main arteries.
(ii) One complete heart beat consists of one systole and one diastole and lasts for about 0.8 second. (ii) Pulse is a regular jerk of an artery. It depends on the rate of heart beat.

Question 15.
Differentiate between Transpiration and Respiration.
Answer:
Difference between Transpiration and Respiration

Transpiration Respiration
(i) It takes place in plants. (i) It takes place in animals.
(ii) Only water vapour is removed. (ii) Sweat containing urea, uric acid and salts are removed.
(iii) It takes place through the leaves and stem and through the stomata and lenticles. (iii) It takes place through the skin. It takes place through the sweat pores of the sweat glands.

Long Answer Type Question

Question 1.
Describe the structure of the human excretory (urinary) system.
Answer:
The human excretory (urinary) system consists of the following organs:

  • Kidneys
  • Ureters
  • Urinary bladder
  • Urethra.

(i) Kidneys. The kidneys are a pair of bean-shaped delicate organs. They are situated one on each side of the mid-dorsal line of the abdominal cavity, just below the level of the stomach.

(ii) Ureters. They are two tubes about 30 cm long, emerging from each kidney with the pelvis of which they are continuous. The ureters run downwards and inwards and open into the urinary bladder.

(iii) Urinary bladder. It serves as a reservoir for the urine. It is a hollow muscular organ lined with stratified epithelium. Its average capacity for storage of urine is about 500 ml.

(iv) Urethra. The urethra in the two sexes differs. The male urethra is about 20 cm in length. While that of females is only 1.5 cm in length.
PSEB 7th Class Science Solutions Chapter 11 Transportation in Animals and Plants 4

PSEB 7th Class Computer Solutions Chapter 6 Microsoft Word (Part-IV)

Punjab State Board PSEB 7th Class Computer Science Book Solutions Chapter 6 Microsoft Word (Part-IV) Textbook Exercise Questions and Answers.

PSEB Solutions for Class 7 Computer Science Chapter 6 Microsoft Word (Part-IV)

Computer Guide for Class 7 PSEB Microsoft Word (Part-IV) Textbook Questions and Answers

1. Fill in the Blanks

Question 1.
……………….. key is used to move the cursor in the next adjoining cell of a table.
(a) Ctrl
(b) Shift
(c) Tab
(d) Home.
Answer
(c) Tab

Question 2.
The table button is present on the …………. tab.
(a) Home
(b) Layout
(c) Insert
(d) View.
Answer
(c) Insert

PSEB 7th Class Computer Solutions Chapter 6 Microsoft Word (Part-IV)

Question 3.
We can change the width of the column by selecting the ………….. button in the Table Group.
(a) Select
(b) View Grid lines
(c) Properties
(d) None of these.
Answer:
(c) Properties

Question 4.
A ………………. consists of a number of columns and rows.
(a) Document
(b) Table
(c) View
(d) Data.
Answer:
(b) Table

Question 5.
A ………….. is an intersection of columns and rows.
(a) Cell
(b) Table
(c) View
(d) Data.
Answer:
(a) Cell

PSEB 7th Class Computer Solutions Chapter 6 Microsoft Word (Part-IV)

2. Very Short Answer Type Questions

Question 1.
Which key is used to move the cursor to the next cell in a table?
Answer:
Pressing the Tab key or right arrow keys moves the cursor to the next cell.

Question 2.
Intersection of a column and row is called?
Answer:
The intersection area of the row and column is called the cell.

Question 3.
Which group of Layout tab contains the split cells option?
Answer:
The split cell option is in the Merge group of the Layout tab.

Question 4.
Which option can be used to join two or more cells?
Answer:
Two or more cells can be merged using the Merge option.

PSEB 7th Class Computer Solutions Chapter 6 Microsoft Word (Part-IV)

3. Short Answer Type Questions

Question 1.
Define Table.
Answer:
A table is a collection of rows and columns where data is grouped together. Rows are placed horizontally and columns are placed vertically in the table and the intersection of a row and column is known as Cell. Cells are small boxes in the worksheet where we enter data.

Question 2.
Write the name of options for inserting a table in Word document?
Answer:
In MS Word, we can create tables in three ways:

  • With the help of Table Buttons.
  • With the help of Insert Table option.
  • With the help of Draw Table option.

Question 3.
What is the use of Split Cells option?
Answer:
Microsoft Word allows cells to be divided into multiple cells. Steps to divide a cell into several smaller sub-cells are as follows:

  • Place mouse pointer inside the cell that you want to split into several cells.
  • Now click on the “Layout” tab and then click on the “Split cells” button from the “Merge” group.
  • A “Split Cells” dialog box will open and ask about the Number of columns/ Number of Rows.
  • Select the required number of rows and columns.
  • Click the OK button.

PSEB 7th Class Computer Solutions Chapter 6 Microsoft Word (Part-IV)

Question 4.
What is the use of Merged Cells option?
Answer:
Microsoft Word allows two or more cells to merge to form one large cell. You will often need to combine the columns in the top row to create a table title. You can combine cells row-by-column or column-by-column, you can’t mix cells diagonally.
The steps for merging cells are as follows:

  • Select the cells we want to merge.
  • Click the Merge Cells button from the Merge group on the Layout tab.
  • When clicked, this option will convert all selected cells into one cell.

Question 5.
How will you enter data in Table Cells?
Answer:
The steps for inserting text into a table are given below:
1. Click on the cell in which you want to insert the text.
2. Now type.
Or
You can also add text using copy paste.

PSEB 7th Class Computer Solutions Chapter 6 Microsoft Word (Part-IV)

4. Long Answer Type Questions

Question 1.
How do you insert a table in your document? Explain any method briefly.
Answer:
In MS Word, we can create tables in three ways:
1. With the help of Table Buttons.
2. With the help of Insert Table option.
3. With the help of Draw Table option.

1. Creating a table using the Table Button
The following are the steps to create a table with the help of table button:

  • Place your cursor where you want to create the table.
  • In the Insert tab, click on the “Table” command from the Table group.
  • Now a grid will open.
  • From this grid, select the rows and columns according to your need.
  • The table you selected will now appear on the screen.

2. Creating a table using the Insert Table option
Below are the steps to create a table using the Insert Table option:

  • In the Insert tab, click on the “Table” command from the Table group.
  • A drop-down menu will open. Click on the “Insert Table” option from this menu.
  • The Insert Table dialog box will appear.
  • In this box, specify the number of rows and columns and click on the ok button.

3. Creating a table with the help-of a Draw table option
The steps to create a table with the help of a draw table option are as follows:

  • In the Insert tab, click on the Table command from the Table group.
  • A drop-down menu will open, click on the Draw Table option from this menu.
  • The mouse pointer will turn into a pencil.
  • Draw a rectangle on the page with the help of a pencil.
  • Draw vertical and horizontal lines to form columns and rows as needed.

Question 2.
Explain Properties button of Layout Tab.
Answer:
With the Table Properties dialog box we can adjust the alignment of the table and the size of the row, column or cell.
PSEB 7th ClPSEB 7th Class Computer Solutions Chapter 6 Microsoft Word (Part-IV) 1.1ass Computer Solutions Chapter 6 Microsoft Word (Part-IV) 1
In MS Word we can also split or merged the Cells into a table.

PSEB 7th Class Computer Solutions Chapter 6 Microsoft Word (Part-IV)

PSEB 7th Class Computer Guide Microsoft Word (Part-IV) Important Questions and Answers

1. Fill in the Blanks

Question 1.
Tables can be drawn in Word using the…………….and ……………. buttons.
(a) Home, Insert, Design table
(b) Table, Insert, Draw table
(c) Both Options are Correct
(d) Both Options are Incorrect.
Answer:
(b) Table, Insert, Draw table

Question 2.
……………. is called a set of rows and columns.
(a) Cell
(b) Table
(c) Documents
(d) None.
Answer:
(b) Table

Question 3.
The table command is available on the……………. tab.
(a) Home
(b) Design
(c) Review
(d) Insert.
Answer:
(d) Insert.

PSEB 7th Class Computer Solutions Chapter 6 Microsoft Word (Part-IV)

Question 4.
With the…………….option we can draw tables as we wish.
(a) Insert Table
(b) Add Table
(c) Draw Table
(d) Quick Table.
Answer:
(c) Draw Table

Question 5.
Clicking the ……………. arrow button moves the cursor to the next cell.
(a) Left arrow
(b) Right arrow
(c) Down arrow
(d) Up arrow.
Answer:
(b) Right arrow

Question 6.
The ……………. option is used to convert text to a table.
(a) Insert Table
(b) Convert Table to Text
(c) Draw Table
(d)Convert Text to Table.
Answer:
(b) Convert Table to Text

Question 7.
Split table is present in ……………. group of Layout tab.
(a) Merge
(b) Clipboard
(c) Style
(d) Design.
Answer:
(a) Merge

Question 8.
The ……………. option adds a new cell to the right of the existing cell.
(a) Auto fill
(b) Insert right
(c) Insert left
(d) Merge cell.
Answer:
(b) Insert right

PSEB 7th Class Computer Solutions Chapter 6 Microsoft Word (Part-IV)

Question 9.
……………. option is used to delete the table.
(a) Merge Table
(b) Split Table
(c) Remove
(d) Delete Table.
Answer:
(d) Delete Table.

Question 10.
The ……………. option is used to add a new row at the above of insertion point.
(a) Insert Row
(b) Insert Below
(c) Insert Above
(d) All of these.
Answer:
(c) Insert Above

PSEB 7th Class Computer Solutions Chapter 6 Microsoft Word (Part-IV)

2. Short Answer Type Questions

Question 1.
Write the steps to covert text into table.
Answer:
Steps to convert text into table are as follows:

  • Select the text which you want to convert into table.
  • Click on the “Table” command in the ‘Table” group of the Insert tab.
  • Select the command “Convert Text To Table”.
  • The “Convert Text to Table” dialog box opens.
  • Select the desired option in the Separate text at section.
  • Click OK button.

Question 2.
With which tabs we can modify the table?
Answer:
Design and layout tabs are used to modify the tables.

PSEB 7th Class Computer Solutions Chapter 6 Microsoft Word (Part-IV)

Question 3.
Write the steps to add a row into the table.
Answer:
In MS Word we have 2 ways to add row into the table. Which are as follows:
Method 1.
Below are the steps to add rows to the table:

  • Place the cursor in the table where you want to add the new row.
  • Now right click on the mouse, a drop-down menu will appear on the screen.
  • Click on the Insert option from this menu.
  • If you want to add a new row above the insertion point, click on the “Insert Row Above” option.
  • If you want to add a new row below the insertion point, click on the “Insert Row Below” option.
  • A new row will appear above the insertion point.

Method 2.
The step of adding rows to the table is given below:

  • Place the cursor in the table where you want to add the new row.
  • From the “Rows & Columns” group of the “Layout tab”, click on the “Insert Above/Insert Below” option.
  • A new row will appear below/above the insertion point

Question 4.
Write the steps to add columns from right click.
Answer:

  • Place the insertion point where you want to add new column.
  • Right-click on the mouse. A menu will appear.
  • Click on the Insert option from this menu.
  • If you want to add a new column to the left of the insertion point, click on the “Insert Column to the left” option.
  • If you want to add a new column to the right of the insertion point, click on the “Insert Column to the right” option.
  • A new column will now appear to the right or left of the cursor.

PSEB 7th Class Computer Solutions Chapter 6 Microsoft Word (Part-IV)

Question 5.
Write the steps to remove a column.
Answer:
Here are the steps to delete a row or column from the table:

  • Select a row or column.
  • Right click your mouse. A menu will appear.
  • Click on the Delete Cells option.
  • A Delete Cell dialog box will now open.
  • Click “Delete entire column” option to delete the column.
  • The appropriate column will be deleted.

Delete columns using the Layout tab

  • Select the row or column you want to delete.
  • Click the “Delete” button from the Rows & Columns group of the Layout tab.
  • A drop-down menu will open.
  • From this menu, click the “Delete Column” option to delete the column.

3. Long Answer Type Questions

Question 1.
How can a table be converted into text and text into a table?
Answer:
Below are the steps for inserting text into a table:
1. Click on the cell in which you want to insert the text.
2. Now type
Or
You can also add text using copy paste

To Convert Text to a Table
Steps to convert text into table are as follows:

  • Select the text which you want to convert into table.
  • Click on the “Table” command in the “Table” group of the insert tab.
  • Select the command “Convert Murine of rows: Text To Table”.
  • The “Convert Text to Table” dialog box opens.
  • Select the desired option in the Separate text at section.
  • Click OK button.

Convert Table into Text:
Steps to convert table into text are as follows:

  • Select the rows of tables you want to convert to text.
  • On the Layout tab, in the Data section, click “Convert To Text”.
  • In the Convert Table box, under Separate Text With, click on the different character you want to use instead of the column boundaries. Rows will be separated by paragraph symbols.

PSEB 7th Class Computer Solutions Chapter 6 Microsoft Word (Part-IV)

Question 2.
Write about the inclusion of a cell in a table.
Answer:
Adding Cells to Tables:
In MS Word, you can add a new cell around the selected cell, such as right, left, up or down. The steps to add a new cell are as follows:

  • Click in the cell.
  • Press the right mouse button inside the cell.
  • From this menu click “Insert” and then click “insert cell” option.
  • Choose which side of the selected cell you want new cell.
    PSEB 7th Class Computer Solutions Chapter 6 Microsoft Word (Part-IV) 2

PSEB 7th Class Computer Solutions Chapter 6 Microsoft Word (Part-IV)

Question 3.
What are table properties and how they can be used?
Answer:
Properties of Tables
With the Table Properties dialog box we can adjust the alignment of the table and the size of the row, column or cell.
In MS Word we can also split or merged the Cells into a table.

PSEB 7th Class Computer Solutions Chapter 6 Microsoft Word (Part-IV) 4

Question 4.
What is ‘Splitting’ and how to split a table, a cell?
Answer:
Splitting the Cell:
Microsoft Word allows cells to be divided into multiple cells. Steps to divide a cell into several smaller sub-cells are as follows:
1. Place mouse pointer inside the cell that you want to split into several cells.
2. Now click on the “Layout” tab and then click on the “Split cells” button from the “Merge” group.
PSEB 7th Class Computer Solutions Chapter 6 Microsoft Word (Part-IV) 7
3. A “Split Cells” dialog box will open and ask about the Number of columns/ Number of Rows.
PSEB 7th Class Computer Solutions Chapter 6 Microsoft Word (Part-IV) 8
4. Select the required number of rows and columns
5. Click the OK button.

Splitting the Table:
Microsoft Word allows a table to be split into multiple tables but a single operation always splits the table into two tables.
The following are simple steps to split a table into two tables in a World Document.
1. Place the cursor in the row that you want to be the first row of the second table.
2. Click the Split Table button ‘ from the Merge group on the Layout tab.
PSEB 7th Class Computer Solutions Chapter 6 Microsoft Word (Part-IV) 9