Bhagya – Page 16 – PSEB Solutions

PSEB 6th Class Science Notes Chapter 16 Garbage Management and Disposal

January 30, 2025January 29, 2025 by Bhagya

This PSEB 6th Class Science Notes Chapter 16 Garbage Management and Disposal will help you in revision during exams.

PSEB 6th Class Science Notes Chapter 16 Garbage Management and Disposal

→ Any substance which is no more useful is called waste.

→ Solid waste is called garbage. It is generated by human activities.

→ Garbage has both useful and non-useful components.

→ There are many types of wastes like industrial waste, domestic waste, agricultural waste, biomedical waste, etc.

→ Two types of garbage or solid waste are biodegradable wastes and non-biodegradable waste.

→ For proper disposal of garbage, we must do segregation before disposing of the garbage. We can do this by using differently colored dustbins.

→ To manage the waste there is the 4R’s i.e. reuse, reduce, recycle, refuse.

→ Some parts of the garbage can be reused.

→ Usually, garbage is collected and thrown in landfills.

→ Composting or vermicomposting can be done of useful components or biodegradable components of garbage.

→ Dry leaves, husk of wheat, and part of crops should not be burnt as they produce lots of smoke and harmful gases.

→ Red worms are good for vermicomposting of vegetable and fruit waste, coffee and tea leaves, weeds, etc. but oily, pickled, salty food, and milk products are not good for red worms.

→ Some types of plastics, paper, glass, and metal can be recycled.

→ Plastics bum with a foul smell and produce lots of harmful gases.

→ Plastic bags cause choking of drains and sewer systems.

→ Plastic bags eaten by animals are the cause of their death.

→ Plastic is useful as things made of them last long.

→ The incineration method releases harmful gases and causes pollution.

→ e-waste includes discarded mobiles or any electronic device.

→ Garbage: The solid waste is called garbage.

→ Dump: A large low-lying area used to dispose of garbage.

→ Landfill: A low-lying area to be filled by garbage is a landfill.

→ Biodegradable Waste: Waste material that can be decomposed by the action of microorganisms into harmless substances.

→ Non-biodegradable Waste: The waste materials that cannot be decomposed easily.

→ Incineration: The process of burning waste in closed containers.

→ Compost: The decomposition of organic material into useful material is compost.

→ Vermi-Composting: The method of preparing compost with the help of red worms is vermicomposting.

→ Gizzard: The teeth like hard structures present in red worms for grinding purposes is called the gizzard.

→ Recycling: The process of using a few materials, again and again, is recycling.

PSEB 9th Class Maths MCQ Chapter 3 Coordinate Geometry

January 30, 2025January 29, 2025 by Bhagya

Punjab State Board PSEB 9th Class Maths Book Solutions Chapter 3 Coordinate Geometry MCQ Questions with Answers.

PSEB 9th Class Maths Chapter 3 Coordinate Geometry MCQ Questions

Multiple Choice Questions and Answer

Answer each question by selecting the proper alternative from those given below each question to make the statement true:

Question 1.
For x = 2, y = 3, u = – 2 and v = – 3, point (x + y, u + v) lies in the ……………. quadrant.
A. first
B. second
C. third
D. fourth
Answer:
D. fourth

Question 2.
For x = 4, y = – 5, u = – 6 and v = 8, point (x + y, u + v) lies In the quadrant.
A. first
B. second
C. third
D. fourth
Answer:
B. second

Question 3.
If (x, y) and (y, x) represent the same point in the coordinate plane, then is possible.
A. x = 5, y = 2
B. x = 2, y = 5
C. x = – 5. y = – 2
D. x = 5, y = 5
Answer:
D. x = 5, y = 5

Question 4.
The line Joining P(3, -2) and Q(3, 4)
A. is parallel to the x-axis
B. is parallel to the y-axis
C. is perpendicular to the y-axis
D. intersects both the axes
Answer:
B. is parallel to the y-axis

Question 5.
The line joining A(- 2, 5) and B(- 2, – 8)
A. is parallel to the x-axis
B. is perpendicular to the x-axis
C. intersects the y-axis
D. intersects both the axes
Answer:
B. is perpendicular to the x-axis

Question 6.
The line joining A (- 2, 5) and B (3, 5) intersects ……………….. .
A. the x-axis at (- 2, 0)
B. the x-axis at (3, 0)
C. the y-axis at (0, 5)
D. the x-axis at (5, 0)
Answer:
C. the y-axis at (0, 5)

Question 7.
The line joining A (3, 2) and B (3, – 2) intersects …………………….. .
A. the x-axis at (0, 3)
B. the x-axis at (3, 0)
C. the y-axis at (0, 2)
D. the y-axis at (0, – 2)
Answer:
B. the x-axis at (3, 0)

PSEB 6th Class Science Notes Chapter 15 Air Around Us

January 30, 2025January 29, 2025 by Bhagya

This PSEB 6th Class Science Notes Chapter 15 Air Around Us will help you in revision during exams.

PSEB 6th Class Science Notes Chapter 15 Air Around Us

→ All living things require air to live.

→ Air is present everywhere around us however we cannot see the air.

→ Our earth is surrounded by a thin layer of air that extends upto many kilometres above the surface of the earth. This is known as the atmosphere.

→ Air is made up of water vapours, Oxygen, Nitrogen, Carbon dioxide, dust, and smoke.

→ Nitrogen and Oxygen are the main constituents of air and are present in large quantities.

→ In the air, nitrogen is 78% and oxygen is only 21%.

→ Oxygen is required for burning.

→ Carbon dioxide is a greenhouse gas.

→ The balance of Oxygen and Carbon dioxide in the atmosphere is maintained by the presence of living organisms (man, animals) and plants.

→ Carbon dioxide is used by plants for producing food by photosynthesis. They release oxygen.

→ Oxygen is consumed by animals and humans for respiration. They produce carbon dioxide.

→ Carbon dioxide is used as a fire extinguisher because carbon dioxide does not support g burning.

→ Air can be compressed and it also exerts pressure.

→ Moving air is called wind.

→ Moving air has the power to rotate a windmill which produces electricity.

→ Windmills are very useful as they produce electricity.

→ Air helps in the dispersal of seeds, pollens, and movement of sailing boats, yachts, gliders, aeroplanes, etc.

→ Dispersal of pollens is known as pollination.

→ Ozone present in the upper layer of the atmosphere protects us from the UV rays of the sun.

→ Air: It is a mixture of many gases like nitrogen, oxygen, carbon dioxide, water vapours, etc.

→ Wind: The moving air is wind.

→ Windmill: A device that is being rotated by air and is used for producing electricity.

→ Atmosphere: The thin blanket of air surrounding the earth constitutes the atmosphere.

PSEB 6th Class Science Notes Chapter 14 Water

January 30, 2025January 29, 2025 by Bhagya

This PSEB 6th Class Science Notes Chapter 14 Water will help you in revision during exams.

PSEB 6th Class Science Notes Chapter 14 Water

→ Water is a vital resource and is considered a boon to live.

→ Water is present all over the earth.

→ Around the 3/4th part of the earth, the surface is covered with water.

→ The human body consists of 70% of water.

→ We need water for our daily activities and for producing other things.

→ Two main sources of water are surface water and groundwater.

→ Water exists in three states i.e. solid, liquid, and gas.

→ We get water from ponds, lakes, rivers, wells, etc.

→ Sea or Ocean water is salty. It is not fit for drinking and for domestic, agricultural, and industrial needs.

→ As water is a vital resource so it must be conserved.

→ Judicious use of water and saving it is conservation of water.

→ Rainwater is a pure form of water and is safe for drinking.

→ Rainwater harvesting is a technique that conserves water by storage of rainwater. This water can be reused for different useful purposes.

→ The water cycle is a cyclic process in which water is circulated between the earth and the atmosphere.

→ Ocean water supplies water to the water cycle and thus plays an important role.

→ Water from oceans, lakes, wet clothes and plants gets evaporated.

→ Clouds are just the condensation of evaporated water in the air.

→ Clouds cause rains and water returns to earth, oceans, lakes, etc.

→ Snow on mountains melts and water runs into rivers.

→ Water is also absorbed by the ground and becomes available to us as groundwater.

→ Heavy rains and no rains cause too many problems.

→ Heavy rains cause floods which destroy lives and properties.

→ Overflow of water in a large amount beyond its normal limits is known as a flood.

→ A flood is a natural disaster.

→ No rain or very little rain in a region is caused by the drought.

→ In drought conditions availability of food, fodder, and water become negligible.

→ With the increase of population, industries, and agriculture also increase which lay stress on the use of water.

→ Melting: The process of conversion of solid into liquid is called melting.

→ Freezing: The process of converting liquid into solid is called freezing.

→ Evaporation: The process of converting liquid into its vapours is called evaporation.

→ Transpiration: The process by which plants lose their water in the air is called transpiration.

→ Condensation: The process of conversion of water vapours into water is called condensation.

→ Precipitation: Falling of water in the form of rain and snow is called precipitation.

→ Clouds: The condensed water droplets join together to form clouds.

→ Water cycle: The evaporation of water to air, formation of clouds by condensation, and falling of rain on the earth constitutes the water cycle in nature.

→ Rainwater harvesting: Collection of rainwater for use at a time when it is not available otherwise is rainwater harvesting.

PSEB 9th Class Maths Solutions Chapter 3 Coordinate Geometry Ex 3.3

January 30, 2025January 29, 2025 by Bhagya

Punjab State Board PSEB 9th Class Maths Book Solutions Chapter 3 Coordinate Geometry Ex 3.3 Textbook Exercise Questions and Answers.

PSEB Solutions for Class 9 Maths Chapter 3 Coordinate Geometry Ex 3.3

Question 1.
In which quadrant or on which axis does each of the points (- 2, 4), (3, – 1), (- 1, 0), (1, 2) and (- 3, – 5) lie? Verify your answer by locating them on the Cartesian plane.
Answer:
PSEB 9th Class Maths Solutions Chapter 3 Coordinate Geometry Ex 3.3 1

Coordinates of the point	Position of the point
(- 2, 4)	In the 2^nd quadrant
(3, – 1)	In the 4^th quadrant
(- 1, 0)	On the x-axis
(1, 2)	In the 1^st quadrant
(- 3, – 5)	In the 3^rd quadrant

Question 2.
Plot the points (x, y) given in the following table on the plane, choosing suitable units of distance on the axes:
PSEB 9th Class Maths Solutions Chapter 3 Coordinate Geometry Ex 3.3 2
Answer:

PSEB 6th Class Science Notes Chapter 13 Fun with Magnets

January 30, 2025January 29, 2025 by Bhagya

This PSEB 6th Class Science Notes Chapter 13 Fun with Magnets will help you in revision during exams.

PSEB 6th Class Science Notes Chapter 13 Fun with Magnets

→ Magnetite is a natural magnet.

→ Some rocks have the property of attracting pieces of iron and these are called natural magnets.

→ Magnet has the property of attracting iron, cobalt, and nickel. Such substances are called magnetic substances.

→ Every magnet has two poles:

North Pole
South pole

→ A freely suspended magnet sets itself in a North-South direction.

→ Unlike (opposite) poles of two magnets attract each other whereas like poles repel each other.

→ Man-made magnets are called artificial magnets.

→ Magnets made from iron pieces are called artificial magnets.

→ Magnets are of different shapes such as Bar magnet, Horseshoe shaped (U-shaped) magnet, cylinderical magnet, or spherical magnet.

→ Compass is used to find direction.

→ When a magnet is brought near a compass, its needle gets deflected.

→ On heating a magnet, striking it with a hammer, or dropping it from a height it loses its property of magnetism.

→ If a magnet is not properly stored then it loses its property with time.

→ To store bar magnets with safety the opposite poles of two magnets are placed facing each other.

→ The magnet should be kept away from cassettes mobiles, TVs, CDs, and computers, etc.

→ Compass: Compass is a device that is needed to determine direction.

→ Magnet: Such substances which have the property of attracting iron are called magnets.

→ Magnetite: Magnetite is a natural magnet that was first discovered by a Shepherd named Magnus.

→ North pole: That end of a freely suspended magnet that points towards the geographical north direction is called its North pole.

→ South pole: That end of a freely suspended magnet that points towards the geographical south direction is called its South pole.

PSEB 9th Class Maths Solutions Chapter 3 Coordinate Geometry Ex 3.2

January 30, 2025January 29, 2025 by Bhagya

Punjab State Board PSEB 9th Class Maths Book Solutions Chapter 3 Coordinate Geometry Ex 3.2 Textbook Exercise Questions and Answers.

PSEB Solutions for Class 9 Maths Chapter 3 Coordinate Geometry Ex 3.2

Question 1.
Write the answer of each of the following questions:
(i) What is the name of horizontal and the vertical lines drawn to determine the position of any point in the Cartesian plane?
Answer:
The horizontal line and the vertical line drawn in the Cartesian plane to determine the position of any point are named as the x-axis and the y-axis respectively.

(ii) What is the name of each part of the plane formed by these two lines?
Answer:
These two lines (x-axis and y-axis) partition the Cartesian plane into four parts each of which is called a quadrant. They are named as Quadrant 1, Quadrant 2, Quadrant 3 and Quadrant 4.

(iii) Write the name of the point where these two lines intersect.
Answer:
These two lines (x-axis and y-axis) intersect at the point named as the Origin.

Question 2.
See the figure given below and write the following:
PSEB 9th Class Maths Solutions Chapter 3 Coordinate Geometry Ex 3.2 1
(i) The coordinates of B.
Answer:
(- 5, 2)

(ii) The coordinates of C.
Answer:
(5, – 5)

(iii) The point identified by the coordinates (-3, -5).
Answer:
E

(iv) The point identified by the coordinates (2, -4).
Answer:
G

(v) The abscissa of the point D.
Answer:
6

(vi) The ordinate of the point H.
Answer:
– 3

(vii) The coordinates of the point L.
Answer:
(0, 5)

(viii) The coordinates of the point M.
Answer:
(- 3, 0)

PSEB 6th Class Maths Solutions Chapter 3 Playing with Numbers Ex 3.1

January 29, 2025January 28, 2025 by Bhagya

Punjab State Board PSEB 6th Class Maths Book Solutions Chapter 3 Playing with Numbers Ex 3.1 Textbook Exercise Questions and Answers.

PSEB Solutions for Class 6 Maths Chapter 3 Playing with Numbers Ex 3.1

1. Write down all the factors of each of the following:

Question (i)
18
Solution:
18 = 1 × 18
18 = 2 × 9
18 = 3 × 6
So, 1, 2, 3, 6, 9 and 18 are factors of 18

Question (ii)
24
Solution:
24 = 1 × 24
24 = 2 × 12
24 = 3 × 8
24 = 4 × 6
So, 1, 2, 3, 4, 6, 8, 12 and 24 are factors of 24

Question (iii)
45
Solution:
45 = 1 × 45
45 = 3 × 15
45 = 5 × 9
So, 1, 3, 5, 9, 15 and 45 are factors of 45

Question (iv)
60
Solution:
60 = 1 × 60
60 = 2 × 30
60 = 3 × 20
60 = 4 × 15
60 = 5 × 12
60 = 6 × 10
So, the factors of 60 are 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30 and 60

Question (v)
65.
Solution:
65 = 1 × 65
65 = 5 × 13
So, 1, 5, 13 and 65 are the factors of 65

2. Write down the first six multiples of each of the following:

Question (i)
6
Solution:
First six multiples of 6 are:
6, 12, 18, 24, 30 and 36

Question (ii)
9
Solution:
First six multiples of 9 are:
9, 18, 27, 36, 45 and 54

Question (iii)
11
Solution:
First six multiples of 11 are:
11, 22, 33, 44, 55 and 66

Question (iv)
15
Solution:
First six multiples of 15 are:
15, 30, 45, 60, 75 and 90

Question (v)
24.
Solution:
First six multiples of 24 are:
24, 48, 72, 96, 120 and 144

3. List all the numbers less than 100 that are multiples of:

Question (i)
17
Solution:
Multiples of 17 less than 100 are:
17, 34, 51, 68 and 85

Question (ii)
12
Solution:
Multiples of 12 less than 100 are:
12, 24, 36,48, 60, 72, 84 and 96

Question (iii)
21.
Solution:
Multiples of 21 less than 100 are:
21, 42, 63 and 84

4. Which of the following are prime numbers?

Question (i)
39
Solution:
Given number = 39
We find that 39 is divisible by 3.
∴ It has more than two factors.
∴ So, 39 is not a prime number

Question (ii)
129
Solution:
Given number =129
It is divisible by 1 and itself So, it has exactly two factors.
∴ 129 is a prime number

Question (iii)
177
Solution:
Given number = 177
We find that 177 is divisble by 3
∴ It has more than two factors.
So, 177 is not a prime number

Question (iv)
203
Solution:
Given number = 203
It is divisible by 1 and itself
So, 203 is a prime number

Question (v)
237
Solution:
Given number = 237
We find that 237 is divisible by 3
∴ It has more than two factors.
So, 237 is not a prime number

Question (vi)
361.
Solution:
Given number = 361
We find that 361 is divisible by 19
∴ It has more than two factors.
So, 361 is not a prime number

5. Express each of the following as sum of two odd prime numbers:

Question (i)
16
Solution:
16 = 3 + 13
= 5 + 11

Question (ii)
28
Solution:
28 = 11+ 17

Question (iii)
40.
Solution:
40 = 3 + 37
= 11 + 29
= 17 + 23

6. Write all the prime numbers between the given numbers:

Question (i)
1 to 25
Solution:
Prime numbers between 1 to 25 are:
2, 3, 5, 7, 11, 13, 17, 19, 23

Question (ii)
85 to 105
Solution:
Prime numbers between 85 to 105 are:
89, 97, 101, 103

Question (iii)
120 to 140.
Solution:
Prime numbers between 120 to 140 are:
127, 129, 131, 137, 139

7. Is 36 a perfect number?
Solution:
Factors of 36 are:
2, 3, 4, 6, 9, 12, 18, 36
Sum of all the factors of 36
= 2 + 3 + 4 + 6 + 9 + 12+18 + 36
= 90
= 2 × 45
But sum of all factors of a number = 2 × Number
Thus, 36 is not a perfect number

8. Find the missing factors:

Question (i)
(i) 5 × …. = 30
(ii) …. × 6 = 48
(iii) 7 × …. = 63
(iv) …. × 8 = 104
(v) …. × 7 = 105.
Solution:
(i) 5 × 6 =30
(ii) 8 × 6 = 48
(iii) 7 × 9 = 63
(iv) 13 × 8 = 104
(v) 15 × 7 = 105.

9. List all 2-digit prime numbers, in which both the digits are prime numbers.
Solution:
All 2-digit numbers, in which both the digits are prime numbers are:
23, 37, 53, 73

PSEB 6th Class Maths MCQ Chapter 2 Whole Numbers

January 29, 2025January 28, 2025 by Bhagya

Punjab State Board PSEB 6th Class Maths Book Solutions Chapter 2 Whole Numbers MCQ Questions with Answers.

PSEB 6th Class Maths Chapter 2 Whole Numbers MCQ Questions

Multiple Choice Questions

Question 1.
The smallest whole number is:
(a) 0
(b) 1
(c) 2
(d) 3.
Answer:
(a) 0

Question 2.
The smallest natural number is:
(a) 0
(b) 1
(c) 2
(d) 3.
Answer:
(b) 1

Question 3.
The successor of 38899 is:
(a) 39000
(b) 38900
(c) 39900
(d) 38800.
Answer:
(b) 38900

Question 4.
The predecessor of 24100 is:
(a) 24999
(b) 24009
(c) 24199
(d) 24099.
Answer:
(d) 24099.

Question 5.
The statement 4 + 3 = 3 + 4 represents:
(a) Closure
(b) Associative
(c) Commutative property
(d) Identity.
Answer:
(c) Commutative property

Question 6.
Which of the following is the additive identity?
(a) 0
(b) 1
(c) 2
(d) 3.
Answer:
(a) 0

Question 7.
The multiplicative identity is ………………. .
(a) 0
(b) 1
(c) 2
(d) 3
Answer:
(b) 1

Question 8.
15 × 32 + 15 × 68 = …………….. .
(a) 1400
(b) 1600
(c) 1700
(d) 1500
Answer:
(d) 1500

Question 9.
The largest 4 digit number divisible by 13 is:
(a) 9997
(b) 9999
(c) 9995
(d) 9991.
Answer:
(a) 9997

Question 10.
The successor of 3 digit largest number is:
(a) 100
(b) 998
(c) 1001
(d) 1000
Answer:
(d) 1000

Question 11.
Which of the following is shown on the given number line?
PSEB 6th Class Maths MCQ Chapter 2 Whole Numbers 1
(a) 2 + 5
(b) 5 + 2
(c) 7 – 2
(d) 7 – 5.
Answer:
(d) 7 – 5

Question 12.
The whole number which comes just before 10001 is:
(a) 10000
(b) 10002
(c) 9999
(d) 9998.
Answer:
(a) 10000

Question 13.
The smallest natural number is:
(a) 1
(b) 0
(c) 9
(d) 10
Answer:
(a) 1

Question 14.
Which is the smallest whole number?
(a) 1
(b) 0
(c) -1
(d) 9
Answer:
(b) 0

Question 15.
Which is the successor of 100199?
(a) 100198
(b) 100197
(c) 100200
(d) 100201.
Answer:
(c) 100200

Question 16.
Which is the predecessor of 10000?
(a) 10001
(b) 9999
(c) 10002
(d) 9998.
Answer:
(b) 9999

Question 17.
How many whole numbers are there between 32 and 53?
(a) 21
(b) 22
(c) 19
(d) 20.
Answer:
(d) 20

Fill in the blanks:

25 …………… 205
10001 …………. 9999
15 × 0 = …………….
0 ÷ 25 = ………….
1 ÷ 1 = ……………

Answer:

Write True or False:

Question 1.
Zero is smallest natural number. (True/False)
Answer:
False

Question 2.
All natural numbers are whole numbers. (True/False)
Answer:
True

Question 3.
All whole numbers are, natural numbers. (True/False)
Answer:
False

Question 4.
The naitural number 1 has no predecessor. (True/False)
Answer:
True

Question 5.
500 is the predecessor of 490. (True/False)
Answer:
False

PSEB 6th Class Maths Solutions Chapter 2 Whole Numbers Ex 2.3

January 29, 2025January 28, 2025 by Bhagya

Punjab State Board PSEB 6th Class Maths Book Solutions Chapter 2 Whole Numbers Ex 2.3 Textbook Exercise Questions and Answers.

PSEB Solutions for Class 6 Maths Chapter 2 Whole Numbers Ex 2.3

1. If the product of two whole numbers is zero. Can we say that one or both of them will be zero? Justify through examples.
Solution:
One of them can be Zero i.e. 0 × 5 = 0
Both of them can be Zero i.e. 0 × 0 = 0.

2. If the product of two whole numbers is 1. Can we say that one or both of them will be 1? Justify through examples.
Solution:
Both of them will be 1.
Example: 1 × 1 = 1.

3. Observe the pattern in the following and fill in the blanks:
PSEB 6th Class Maths Solutions Chapter 2 Whole Numbers Ex 2.3 1
Solution:

4. Observe the pattern and fill in the blanks:
PSEB 6th Class Maths Solutions Chapter 2 Whole Numbers Ex 2.3 3
Solution:

5. Represent numbers from 24 to 30 according to rectangular, square or triangular pattern.
Solution:
Numbers from 24 to 30 are 24, 25, 26, 27, 28, 29, 30.
PSEB 6th Class Maths Solutions Chapter 2 Whole Numbers Ex 2.3 5

6. Study the following pattern:

Question (i)
PSEB 6th Class Maths Solutions Chapter 2 Whole Numbers Ex 2.3 7
Hence find the sum of
(a) First 12 odd numbers
(b) First 50 odd numbers.
Solution:
(a) Sum of first 12 odd numbers = 12 × 12 = 144
(b) Sum of first 50 odd numbers = 50 × 50 = 2500