Pollution of Air and Water NCERT Solutions: Class 8 Science CBSE

Question 1
Question 2

Explain the differences between pure air and polluted air.

Question 3
Question 4
Question 5

Explain circumstances leading to acid rain. How does acid rain affect us?

Question 6

Describe the threat to the beauty of the Taj Mahal.

Question 7
Question 8
Question 9
Question 10

Which of the following is not a greenhouse gas?

(a) Carbon dioxide

(b) Sulphur dioxide

(c) Methane

(d) Nitrogen

Question 11

Describe the ‘Greenhouse Effect’ in your own words.

Question 12

Prepare a brief speech on global warming. You have to deliver the speech in your class.

Question 13
Question 14

At an individual level, how can you help reduce air pollution?

Question 15
Question 16

What are the different ways in which water gets contaminated?

Question 17
Question 18

Why does the increased level of nutrients in the water affect the survival of aquatic organisms?

Question 19
Question 20
Question 21

Clear, transparent water is always fit for drinking. Comment.

Question 22

You are a member of the municipal body of your town.

Make a list of measures that would help your town to ensure the supply of clean water to all its residents.

Question 23

Match the following.

A’

 

B’

 

(a)

 

Potassium chlorate

 

1.

 

Catalyst

 

(b)

 

Micro-organisms

 

2.

 

Nitrogen

 

(c)

 

Greenhouse effect

 

3.

 

Carbon dioxide

 

(d)

 

Fertilizers

 

4.

 

Oxygen

 

(e)

 

Manganese dioxide

 

5.

 

Nitrogen fixation

 

 

Question 24

What is the function of the blacksmith’s bellows?

Question 25

Why does the fire go out if water is thrown on the burning wood?

Question 26

What is the use of atmospheric ozone?

Question 27

A pouch of a chemical powder is placed in some bottles of medicines. What is this chemical? Why is it placed there?

Question 28

What are the advantages of planting trees along river banks?

Question 29

How is the Taj Mahal threatened by the environment?

Question 30

How should chimneys of factories be very tall?

Question 31

What laws have been made by the Government to prevent the pollution of water?

 

Question 32

What are the advantages of boiling water for drinking?

NCERT Question Solutions

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