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Chapters1 - Crop Production and Management
2 - Microorganisms : Friend and Foe
3 - Synthetic Fibres and Plastics
4 - Materials : Metals and Non-metals
5 - Coal and Petroleum
6 - Combustion and Flame
7 - Conservation of Plants and Animals
8 - Cell - Structure and Functions
9 - Reproduction in Animals
10 - Reaching the Age of Adolescence
11 - Force and Pressure
12 - Friction
13 - Sound
14 - Chemical Effects of Electric Current
15 - Some Natural Phenomena
16 - Light
17 - Stars and the Solar System
18 - Pollution of Air and Water
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Chapter 18 - Pollution of Air and Water
Pages 252 - 253
What are the different ways in which water gets contaminated?
At an individual level, how can you help reduce air pollution?
Clear, transparent water is always fit for drinking. Comment.
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
Explain the differences between pure air and polluted air.
Explain circumstances leading to acid rain. How does acid rain affect us?
Which of the following is not a greenhouse gas?
(a) Carbon dioxide
(b) Sulphur dioxide
Describe the Greenhouse Effect in your own words.
Prepare a brief speech on global warming. You have to deliver the speech in your class.
Describe the threat to the beauty of the Taj Mahal.
Why does the increased level of nutrients in the water affect the survival of aquatic organisms?
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