Class 4

Punjab State Board PSEB 4th Class EVS Book Solutions Chapter 21 Houses and Bridges Textbook Exercise Questions and Answers.

PSEB Solutions for Class 4 EVS Chapter 21 Houses and Bridges

EVS Guide for Class 4 PSEB Houses and Bridges Textbook Questions and Answers

Textbook Page No. 150

Activity-1.
Write the names of different types of Professionals after seeing the picture.

Answer:

Textbook Page No. 151

Activity-2.
Motivate the students to prepare bricks from soil with the help of an empty matchbox.
Answer:
Do it yourself.

Textbook Page No. 152

Question 1.
Make a list of things used to make Pucca house.
Answer:
Cement, bricks, sand, soil, concrete iron, steel, stone, wood etc.

Question 2.
What does a mason do?
Answer:
He constructs a building using bricks, cement, sand etc. He plasters the floor using of stones, cements and tiles etc.

Question 3.
How can the air pollution caused by smoke of kilns be lessened?
Answer:
There should be plantation in big number. Trees help in the reduction of pollution.

Textbook Page No. 153

Question 4.
Tick the (✓) right Answer :
(a) Which tool is used by a mason to check the verticality of the wall?
Hammer
Plumbline
Measuring Tape
Brick Travel
Answer:
Plumbline.

(b) What happens to mixture of cement, gravel sand and water when kept for some time?
Weakens
Softens
Hardens
Brittle
Answer:
Hardens

(c) Which apparatus is used by an electrician for testing the current?
Plier
Tester pin
Screw driver
Bulb
Answer:
Tester pin.

(d) From what material the bricks are made up?
Wet clay
Sand
Straw
Dust
Answer:
Wet clay.

Textbook Page No. 157

Question 1.
Match the Columns :

Answer:
1. (b),
2. (c),
3. (c),
4. (a),
5. (f),
6 .(d).

Activity-3.
Build an over bridge to pass over the flower beds in your home or school. Make a list of items required to build it.
Answer:
Do it yourself.

Question 6.
Which bridges have you seen? Write the name of places where you have seen the bridges.
Answer:
While going from Jalandhar to Ludhiana bridge over the sutlej and the Hawra bridge Kolkata.

Question 7.
What is the need to construct flyovers?
Answer:
These are constructed to cross rivers and also to control the traffic rush on the roads.

Punjab State Board PSEB 4th Class EVS Book Solutions Chapter 20 Know Your Currency Textbook Exercise Questions and Answers.

PSEB Solutions for Class 4 EVS Chapter 20 Know Your Currency

EVS Guide for Class 4 PSEB Know Your Currency Textbook Questions and Answers

Activity.
Look at the notes carefully, which out of these are part of Indian currency. Try to find out which notes are of which country.

Answer:
₹ 100 and ₹ 10 and ₹ 5 notes belong to India and other belong to other countries

Textbook Page No. 145

A picture of five hundred rupee note Is given below

Observe and answer the following questions.

Question 1.
How many languages are written on a five hundred rupee note?
Answer:
Seventeen languages

Question 2.
Picture of which historic monument is printed on a five hundred rupee note?
Answer:
Red Fort

Question 3.
Out of the above coins, how many coins can you identify?
Answer:
I can identify all the coins.

Question 4.
What is marked on these coins besides their price?
Answer:
Signs of mint, years of manufacturing, Bharat, India, three lion Idol etc, are marked on the coins.

Textbook Page No. 146

Activity. Look at the currency notes given below :

Write down their value in the boxes given in front of them.

Answer:

Textbook Page No. 147

Question 5.
How will you get to know the country, whose currency is shown in the pictures?
Answer:
Currency belongs to India, we know it from the languages of India, pictures of Mahatma Gandhi. Also Reserve bank of India is printed on the note. It also bears national emblem of India (Three lion)

Question 6.
Whose pictures do you see on Indian notes?
Answer:
National emblem and Mahatma Gandhi.

Question 7.
Can you see any other number besides price on these notes?
Answer:
Yes, A serial number is printed on each note.

Question 8.
Can two notes have identical numbers?
Answer:
No, there can not be two identical numbers.

Question 9.
Write down the name of bank written on Indian Currency Note.
Answer:
Reserve bank of India.

Punjab State Board PSEB 4th Class EVS Book Solutions Chapter 19 Chhuck-Chhuck Rail Textbook Exercise Questions and Answers.

PSEB Solutions for Class 4 EVS Chapter 19 Chhuck-Chhuck Rail

EVS Guide for Class 4 PSEB Chhuck-Chhuck Rail Textbook Questions and Answers

Textbook Page No. 134

Question 1.
Why is it necessary to save the Environment?
Answer:
We are directly related to the environment, polluted environment means unhealthy life. If we do not save the environment then human life and flora-fauna will come to an end.

Question 2.
Which activities are being performed in your school by the cleanliness club?
Answer:
Do, it yourself.

Activity-1.
Make a list of Cleanliness Club/Eco Club members of your School.

Name of Club Member	Designation/Class	Name of Club Member	Designation/Class

Answer:
Do it yourself.

Textbook Page No. 135

Activity-
Children, you must have gone to Bus stand. What is the difference between a Bus Stand and a Railway Station? Prepare a list of things which are different at Bus Stand and at Railway Station.

Things seen at Bus Stand	Things seen at Railway Station

Answer:
Do it yourself.

Textbook Page No. 136

Activity.
Arrange a rail ticket and help the students to fill up the following information :
1. Age …………………
2. Fare …………………
3. Date of Travel …………………
4. No. of Passengers …………………
5. Seat No. …………………
Answer:
Do it yourself.

Question 3.
Fill in the Blanks : (Himalayan queen, cleanliness clubs, online)
(a) Now in the era of Information & Technology, booking of tickets can be done ………………… from home.
(b) ………………… have been established in schools for creating awareness regarding cleainliness of schools and neighbourhood.
(c) ………………… is the name of train running between Kalka and Shimla.
Answer:
(a) online,
(b) Cleanliness clubs,
(c) Himalayan queen.

Question 4.
Which animal is suitable animal for desert? What are the main features of this animal?
Answer:
Camel is a suitable animal for desert

• It has flat and padded feet which help it to walk over the land.
• It can remain fit many days without food and water.

Question 5.
What is meant by ferry?
Answer:
It is a boat used to transport people from one place to other nearby area.

Question 6.
What are the specialities of bullet train?
Answer:
It is very fast it can cover 500 kilometers in one hour.

Textbook Page No. 142

Fig. Scene of A Railway Crossing

Question 7.
Some people keep on crossing the railway gate while it is closed for the train. Is it right to do so?
Answer:
No, it is not right at all. There can be an accident and it is illegal also.

Punjab State Board PSEB 4th Class EVS Book Solutions Chapter 18 Water Management Textbook Exercise Questions and Answers.

PSEB Solutions for Class 4 EVS Chapter 18 Water Management

EVS Guide for Class 4 PSEB Water Management Textbook Questions and Answers

Textbook Page No. 128

Question 1.
From where does the water come in big tank?
Answer:
Underground water is lifted up by motors to fill the big tank.

Question 2.
Is the water of your school checked ever? Who checks it?
Answer:
Do it yourself.

Question 3.
Can rain water be harvested?
Answer:
Yes, rain water can be harvested. Rain water from the roof tops is allowed to go into the ground using borewells.

Activity-1.
Collect the rain water directly in a bucket and check after sometimes if this water is clear or not.
Answer:
Do it yourself.

Question 4.
Fill in the blanks : (shower, flower beds, potted plants, submersible, earthen pitcher)
1. Villagers use …………………….. for storage of water.
2. Bucket/mug should be used instead of …………………….. for bathing.
3. After washing vegetables we can put used water into ……………………. .
4. People have installed …………………….. pumps in their houses.
5. Waste water from RO can be put into ……………………. .
Answer:
1. earthen pitcher,
2. shower,
3. flowerbeds,
4. submersible,
5. potted plants.

Question 5.
Tick (✓) the correct and cross (✗) the wrong sentences :
(a) It is necessary to conserve water.
(b) After washing vegetables, the used water should be thrown away.
(c) Unused running tap should immediately be closed.
(d) R.O. system saves the water.
(e) We should keep the the tap running while brushing.
Answer:
(a) ✓
(b) ✗
(c) ✓
(d) ✗
(e) ✗

Question 6.
Tick the (✓) right answer :
(a) What is used to store water in villages?
Pitcher
Tank
Drum
Answer:
Pitcher.

(b) From where is’ the water pumped out by submersible pump?
Underground
From Canals
From ponds
Answer:
Underground.

(c) Who checks drinking water in schools?
Education Department
Water and Sanitation Department
Health department
Answer:
Water and Sanitation Department.

(d) What should be used to stop overflow of tanks?
Submersible pump
Auto cut switch
R.O. System
Answer:
Auto cut switch.

(e) What type of water is conserved by Rainwater Harvesting?
Rain water
Pond water
Canal water
Answer:
Rain water.

Question 7.
Answer the following questions in brief:
(a) From where does the water come in our houses?
Answer:
Water works department is responsible for the supply of water to our houses.

(b) What is added to water to kill microorganisms in water?
Answer:
Chlorine tablets are added.

(c) Which method should be applied to store rainwater?
Answer:
Rain water harvesting system.

(e) Write two good habits for water conservation.
Answer:

• Use bucket/mug for bathing and while brushing your teeth.
• Avoid the use of shower while bathing.

Punjab State Board PSEB 4th Class EVS Book Solutions Chapter 17 Water Pollution Textbook Exercise Questions and Answers.

PSEB Solutions for Class 4 EVS Chapter 17 Water Pollution

EVS Guide for Class 4 PSEB Water Pollution Textbook Questions and Answers

Textbook Page No. 122

Question 1.
List the activities carried on by people near water sources that pollute the ‘ water?
Answer:
Bathing, washing clothes, defacations cattle bathing etc.

Activity-1.
Try to Find out from Doctor or Staff of nearby Primary Health Centre of your village/city, which diseases are caused by drinking contaminated water and also find the number of patients suffering from these diseases. Note this information in your notebooks and discuss with your friends.
Answer:
Do it yourself.

Question 2.
Which diseases are spread by mosquitoes?
Answer:
Malaria, Dengue.

Activity-2.
Prepare ORS solution with the help of your teacher.
Answer:
Boil a glass of water and let it cool. Add one spoon full of sugar and a pinch of salt in it. ORS is ready.

Textbook Page No. 125-126

Question 3.
Fill in the blanks :
(Diarrhoea, cleans, dirty, Kali Bein, urbanisation)
(a) The water gets ………………… after domestic use.
(b) Due to ………………… there is increase in water utilisation.
(c) Water Treatment Plant ………………… the dirty water.
(d) ………………… can be caused by drinking contaminated water.
(e) ………………… is associated with Sri Guru Nanak Dev Ji.
Answer:
(a) dirty,
(b) urbanisation,
(c) cleans,
(d) Diarrhoea,
(e) Kali Bein.

Question 4.
Tick (✓) the right and cross (✗) the wrong sentences :
(a) We are not responsible for water pollution.
(b) There should be a ban on the use of plastic bags.
(c) Nothing happens due to drinking contaminated water.
(d) Water is filtered by R.O. filter.
Answer:
(a) ✗
(b) ✓
(c) ✗
(d) ✓

Question 5.
Tick (✓) the right answer :
(a) Which one of the following is responsible for water pollution?
Dust
Polyethene
Noise
Answer:
Polyethene

(b) What gets polluted by spraying of insectiddes?
Air
Water
Both
Answer:
Both.

(c) Which water body has been cleaned by Sant Balveer Singh Seechewal?
Ganga River
Kali Bein
Sutlej River
Answer:
Kali Bein.

(d) Which disease can be caused by drinking contaminated water? Cholera Malaria Dengue
Answer:
Cholera.

Question 6.
Write the answers of the following in brief:

(a) Write any two reasons of water pollution.
Answer:

• Use of insecticides in the fields.
  Use of fertilizers in the fields.
• Washing of clothes near the water sources.

(b) Name the diseases caused by drinking polluted water.
Answer:
Cholera, dysentery, diarrhoea, teeth problem, skin problem etc.

(c) Write two methods of cleaning water.
Answer:

• R.O. Filter system
• Water treatment plant.

(d) What is added to water to prepare ORS?
Answer:
Sugar and, Salt.

(e) Write two methods of stopping water pollution.
Answer:

• Farmers should use less insecticides.
• Polytbene should be completely banned.

Question 7.
Mind Mapping:

Answer:

Punjab State Board PSEB 4th Class EVS Book Solutions Chapter 16 Water Conservation Textbook Exercise Questions and Answers.

PSEB Solutions for Class 4 EVS Chapter 16 Water Conservation

EVS Guide for Class 4 PSEB Water Conservation Textbook Questions and Answers

Textbook Page No. 116

Question 1.
What was the main source of irrigation in old times?
Answer:
Rainwater.

Question 2.
How is groundwater affected by the cultivation of paddy?
Answer:
Ground water is getting depleated due to cultivation of paddy.

Question 3.
What is the main source of irrigation in Punjab, now-a-days?
Answer:
Tubewells.

Question 4.
Write any one way to conserve water at home.
Answer:
We can wash the utensils with the waste water of RO filter.

Activity-2.
Enlist the public taps in your village and note how many of them are not turned off after use.
Answer:
Do it yourself.

Textbook Page No. 119-120

Question 5.
Answer the following questions in brief:
(a) What measures should be adopted to minimise the use of water in agriculture? –
Answer:
We should adopt the modern techniques of irrigation e.g. drip system, fountain system of irrigation.

(b) What is the effect of submersible pumps on the use of water in houses?
Answer:
Ground water is getting depleated, we are not using water wisely. We waste a lot of water.

(c) Why can we not use water of ocean?
Answer:
Many Unwanted salts are dissolved in sea water, it is not fit for direct consumption.

(d) What is the proper way of using water while brushing/bathing?
Answer:
We should use Bucket and mug and should not let the tap turned on.

Question 6.
Tick (✓) the right option :
(a) Without which thing we can not survive?
Chocolate
Water
Mobile
Answer:
Water.

(b) What percentage of Earth’s surface is under water?
65%
75%
70%
Answer:
70%.

(c) Underground water is drawn out
with
Tubewell
Pond 1
Canals
Answer:
Tubewell.

(d) How does the ocean water taste?
Sweet
Bitter
Salty
Answer:
Salty.

(e) Which crop needs more water?
Wheat
Paddy
Millet
Answer:
Paddy.

Question 7.
Fill in the blanks :
(Water, down, less, save, submersible)
(a) We should water.
(b) There is a little on earth for use.
(c) People deploy pumps in house.
(d) The crops like gram, millet and guwar need water.
(e) The level of underground water is going
Answer:
(a) save,
(b) water,
(c) submersible,
(d) less,
(e) down.

Question 8.
Tick (✓) the correct and cross (✗) the wrong sentences :
(a) Conservation of water is essential.
(b) Submersible pumps are deployed in houses to save water.
(c) The level of underground water is going down rapidly.
(d) We can use the salty water of ocean in houses.
(e) Water is a renewable resource.
Answer:
(a) ✓
(b) ✗
(c) ✓
(d) ✗
(e) ✓

Punjab State Board PSEB 4th Class EVS Book Solutions Chapter 15 Cleanliness of Habitat Textbook Exercise Questions and Answers.

PSEB Solutions for Class 4 EVS Chapter 15 Cleanliness of Habitat

EVS Guide for Class 4 PSEB Cleanliness of Habitat Textbook Questions and Answers

Textbook Page No. 107

Question 1.
What are the harms of using plastic bags?
Answer:
After using plastic bags we throw them in the garbage. Animals can swallow them and this can be fatal. These bags block the drainage system. These also cause soil pollution. These are non-biodegradable.

Question 2.
Write the names of diseases that spread from openly dumped garbage.
Answer:
Plague, typhoid, cholera, brain fever, dysentery, jaundice, skin disease etc.

Textbook Page No. 112-114

Question 3.
Fill in the blanks :
(Polythene, Dustbins, environment, fresh-air)
(a) Sun light and …………………… are necessary things in the house.
(b) Garbage causes harmful effects on health and ………………….. .
(c) We should minimise the use of ………………….. .
(d) …………………… should be used to put garbage.
Answer:
(a) fresh-air,
(b) environment,
(c) polythene,
(d) Dustbins.

Question 4.
Tick (✓) the right and cross (✗) the wrong sentence :
(a) Openly dumped garbage causes air pollution.
(b) Garbage should be put in dustbins.
(c) There should be maximum use of plastics.
(d) Plastics bottles can be reused.
(e) Rock Garden is situated in Ludhiana.
Answer:
(a) ✓
(b) ✓
(c) ✗
(d) ✓
(e) ✗

Question 5.
Tick (✓) the right answer:
(a) What is included in biodegradable waste?
Plastic
Paper
Glass
Answer:
Paper.

(b) What is included in non-biodegradable waste?
Leaves
Peels
Polythene
Answer:
Polythene.

(c) Which of these is a cause of maximising garbage?
Stray animals
Urbanization
Agriculture
Answer:
Urbanization.

(d) Which garden is made by Sh. Nek chand Ji?
Rock Garden
Rose Garden
Nek Garden
Answer:
Rock Garden.

(e) What is produce by gobar?
Paper
Bio-gas
Card-board
Answer:
Bio-gas.

Question 6.
Match the Column :
(A) – (B)
1. Dustbin – (a) Cement
2. Polythene – (b) Chandigarh
3. Concrete – (c) Roof
4. Lintel – (d) Envelops
5. Rock-garden – (e) Dustbin.
Answer:
1. (e),
2. (d),
3. (a),
4. (c),
5. (b).

Question 7.
Answer the following questions in brief:

(a) What is a dustbin?
Answer:
It is a container in which we throw garbage.

(b) Write any one use of cleanliness?
Answer:
Environment remains clean and we remain healthy.

(c) What is included in biodegradable waste?
Answer:
Paper, leaves, vegetables and fruit skin and remains, cow dung, wastage of garden.

(d) What is included in non- biodegradable waste?
Answer:
Plastic bags, glass, tin, iron, breakage of articles made up from plastic.

(e) Why two different coloured dustbins are used?
Answer:
Red dustbin-For non-biodegradable waste.
Green Dustbin-For biodegradable wastes.

(f) What is meant by cleanliness?
Answer:
Meaning of cleanliness in keeping ourselves and our environment clean.

(g) Why there is increase in garbage?
Answer:
Increased production of usable items, consumable items is the main cause of increase in garbage. People do not recycle the things and also do not reuse them.

(h) What are the harmful effects of garbage?
Answer:
It causes bad smell, pollutes air, water and soil, can spread diseases.

(i) How can garbage be managed?
Answer:

• Leaves, vegetable and fruit wastage can be used as fodder for the animals.
• Prepare manure from garden waste, cow dung, leaves, vegetable and fruit peels by dumping them in compost pit.

(j) What should, we do to reduce waste?
Answer:
We should reduce the use of paper and should write on both sides of the paper. We should use slate. Keep the books clean and after completing your class donate these to book bank. We should use cloth bag while going to market and should avoid polythene bags. We should reuse the things by repairing the faulty articles.

Punjab State Board PSEB 4th Class EVS Book Solutions Chapter 14 Habitat of Animals Textbook Exercise Questions and Answers.

PSEB Solutions for Class 4 EVS Chapter 14 Habitat of Animals

EVS Guide for Class 4 PSEB Habitat of Animals Textbook Questions and Answers

Textbook Page No. 98

Activity-1.
Below are written the names of a few animals. Find out who lives where: Tortoise, Lion, Fish, Dog, Cat, Sparrow, Snake, Monkey, Crocodile, Buffalo, Duck, Octopus.
Answer:

On Land	In Water	Both on land and in water
Lion, Dog, Cat, Sparrow, Snake, Monkey, Buffalo.	Fish, Duck, Octopus	Tortoise, Crocodile

Textbook Page No. 101

Question 1.
Which birds have you seen around you?
Answer:
Sparrow, crow, eagle, parrot, pigeon, owl, woodpecker etc.

Textbook Page No. 102

Activity-2:
Make a list of animals/birds seen around and write the habitat in front of their name :
Answer:
Do it yourself.

Textbook Page No. 103-104

Question 2.
Fill in the blanks :
(aquatic, teeth, den, Cockroach, Eggs)
(a) Lion lives in a …………………………
(b) Birds do not have …………………………
(c) ……………………….. of birds are safe in the nest.
(d) Octopus is an ……………………….. animal.
(e) ……………………….. lives in a moist (damp) and dark place.
Answer:
(a) Den,
(b) teeth,
(c) Eggs,
(d) aquatic,
(e) Cockroach.

Question 3.
Tick (✓) the correct and cross (✗) the wrong sentences :
(a) Sea horse lives in water.
{b) Snakes live in a den.
(c) Penguin cannot fly.
(d) Tiger is an aquatic animal.
(e) The nest of weaver bird is like a
hanging bottle.
Answer:
(a) V, (b) x, (c) V, (d) x, (e) V.

Question 4.
Tick the (✓) correct answer :
(a) What do the honeybees make to live in?
Hives
Beehives
Mound
Answer:
Beehives.

(b) Where do the elephants live?
In caved den
In water
Under the trees.
Answer:
Under the trees.

(c) Which animals out of the following live in den?
Bear
Dear
Giraffe
Answer:
Bear.

(d) Which animal out of the following live in tree cavities?
Pigeon
Sparrow
Owl
Answer:
Owl.

(e) Which bird out of the following make nest on trees?
Lapwing
Vulture
Crow
Answer:
Crow.

Question 5.
Match the Columns :
1. Horse (a) Web
2. Sheep/goat (b) stable
3. Buffalo/Cow (c) sheds
4. Spiders (d) hives
5. Wasps (e) Pen.
Answer:
1. (b),
2. (e),
3. (c),
4. (a),
5. (d).

Question 6.
Write the names of a few wild animals.
Answer:
Lion, tiger, bear etc.

Question 7.
Write the names of a few pet animals.
Answer:
Dog, buffalo, horse, goat, camel.

Question 8.
Write the names of a few aquatic animals.
Answer:
Whale, Dolphine, Octopus, Sea¬horse, fish.

Question 9.
Where do the ants and termite live?
Answer:
Ants an
d termite live in mounds under the soil.

Question 10.
With which material spiders make their webs?
Answer:
Spider throw a viscous material from its mouth and this material is used to form a web.

Punjab State Board PSEB 4th Class EVS Book Solutions Chapter 13 Human Habitat Textbook Exercise Questions and Answers.

PSEB Solutions for Class 4 EVS Chapter 13 Human Habitat

EVS Guide for Class 4 PSEB Human Habitat Textbook Questions and Answers

Textbook Page No. 94

Activity:
Make a model of a house with ice cream/kulfi sticks.
Answer:
Do it yourself.

Textbook Page No. 96

Question 1.
Fill in the blanks :
(big cities, bricks, jobs, forests, good citizen)
(a) Early man lived in
(b) Pucca house is built from
and cement.
(c) There are multistoreyed buildings in
(d) Most of the people of cities do
and trade
(e) School helps the children to become
Answer:
(a) Forests
(b) bricks
(c) big cities
(d) jobs
(e) good citizen.

Question 2.
Tick (✓) the correct and cross (✗) the wrong sentence :
(a) Early man used to live in pucca houses.
(b) Agriculture is the main occupation of villagers.
(c) Kutcha house is built with the help of bricks and cement.
(d) There is no need of sun light and fresh air in house.
Answer:
(a) x,
(b) V,
(c) x,
(d) x.

Question 3.
Tick (✓) the right answer :
(a) What are multistoreyed buildings called?
Flat
Basti
Slum
Answer:
Flat.

(b) Panchayat meetings are held :
Under trees
In Panchayat house
In Post office
Answer:
In Panchayat house.

(c) Health services are provided in villages :
By Post Office
By Health Centre
By Villagers
Answer:
By Health Centre.

Question 4.
What is meant by flats?
Answer:
Houses built in multi storeyed buildings are called flats.

Textbook Page No. 97

Question 5.
What type of life is led by slum people?
Answer: They do not live a healthy life.

Question 6.
What materials are used in making Kutcha houses?
Answer:
Mud. earth, grass.

Question 7.
What materials are used in making pucca houses?
Answer:
Cement, sand, gravel, iron, wood, bricks, marble etc.

Question 8.
Mind Mapping :

Answer:

Punjab State Board PSEB 4th Class EVS Book Solutions Chapter 12 Beaks and Teeth Textbook Exercise Questions and Answers.

PSEB Solutions for Class 4 EVS Chapter 12 Beaks and Teeth

EVS Guide for Class 4 PSEB Beaks and Teeth Textbook Questions and Answers

Textbook Page No. 82

Activity-1.
Speak some tongue-twister sentences rapidly. Few are given below :
1. Kutcha papad pucca papad-Kutcha papad pucca papad.
2. Dilli de dukandar, dadi de do dukhde danda di dawai de de.
Answer:
Do it yourself.

Question 1.
Write the number of milk teeth and permanent teeth.
Answer:
Milk teeth-20 Permanent teeth-32

Question 2.
What are the functions of tongue?
Answer:
1. Helps in knowing the taste.
2. Helps in speech.

Activity-2.
Write down the number and health of teeth of your family.

Name of Member	Relation	Number of Teeth	Health of Teeth

Answer:
Do it yourself.

Question 3.
What is Enamel?
Answer:
Hardest outer white layer of teeth is called Enamel.

Textbook Page No. 83

Question 4.
What do you do to prevent tooth decay?
Answer:
We should clean our teeth before sleeping and after getting up early in the morning.

Question 5.
Match the Columns :
(A) (B)
1. Incisors (a) Tearing of food
2. Canines (b) Chewing of food
3. Pre-Molars (c) Grinding of food
4. Molars (d) Cutting of food
Answer:
1. (d),
2. (a),
3. (b),
4. (c).

Question 6.
Which tastes are felt with tongue?
Answer:
Sweet, sour, salty, bitter.

Textbook Page No. 84

Question 7.
What do you mean by “Haathi de dand, khan de hor, vikhaun de hor”?
Answer:
Elephants have a pair of teeth outside the mouth which are not used for eating purpose. Therefore it is said that ‘Haathi de dand, khan de hor, vikhaun de hor.

Question 8.
What is the function of long teeth (incisors) of dog?
Answer:
Dog is a carnivorous animal. They tear the flesh with the help of these long teeth.

Activity-3 :
Observe the food habits of animals living around you.

Name of animal	Food	Herbivorous/ Carnivorous	shape of incisors

Answer:
Do it yourself.

Textbook Page No. 85

Write names of the birds below the Pictures.

Answer:
1. Parrot
2. Eagle
3. duck
4. Sparrow
5. Pelican
6. Woodpecker.

Textbook Page No. 86

Question 9.
Tick (✓) the correct answer:

(a) Which of these birds eat fish?
Parrot
Kingfisher
Crow
Pigeon
Answer:
Pigeon

(b) Which of these birds have a pouch under its beak ?
Duck
Pelican
Woodpecker
Kingfisher
Answer:
Pelican.

Question 10.
Why is the beak of woodpecker larger than beak of Sparrow?
Answer:
Woodpecker picks insects from the holes of the trees so it has long beak but sparrow picks grains so its beak is small.

Question 11.
Which of the birds eat flesh after preying?
Answer:
owl, eagle, kite.

Activity-4 :
Write the names of the birds with long and short beaks and their food.

Long beaked birds	Food	Short beaked birds	Food

Answer:
Do it yourself.

Textbook Page No. 87

Activity-
Claws of different birds are given, write their functions.

Answer:
Catching prey and tearing flesh
Can catch the bark of the tree
tightly hold the tree
To swim and to walk over water

Textbook Page No. 88-89

Question 12.
How does the eagle use its claws?
Answer:
It uses its claw to catch its prey.

Question 13.
How do the Claws of a duck useful for it?
Answer:
It helps in swimming over the water.

Question 14.
Which bird can easily climb the trees?
Answer:
Woodpecker.

Activity-5 :
Write the function of nails by seeing the birds around :

Name of the bird	Function of nails

Answer:
Do it yourself.

Activity-6.
Put the grains for the birds at same place daily in your house and write down the name and number of birds who came there to eat grains :

Name of the bird	Number	Name of bird	Number

Answer:
Do it yourself.

Question 15.
Mind Mapping :


Answer: