CBSE Class 8 Science Pollution of Air and Water Assignment Set B

CBSE Class 8 Science - Pollution of Air and Water (2)

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<1M>

1.Define air pollution.

2.Which gas is the main constituent of air?

3.Name the green house gases

4.Give two examples of air pollutants.

5.Which two gases cause acid rain?

6.Which phenomenon is responsible for global warming?

7.What is Marble cancer?

8.Which plan was made to save river Ganga?

9.Name two chemical contaminants of water.

10.Which gas is produced due to incomplete combustion of fuels?

11.Name the chemical which is used for the purification of water.

<2M>

12.What is air pollution? Which two diseases are caused due to air pollution?

13.Define potable water? Write the name of any two methods used for the purification of

water.

14.What is the Greenhouse effect? How does it affect the atmosphere?

15.What steps has the Supreme Court taken to save the Taj Mahal from air pollution?

16.What is water pollution? Give two examples of water pollutants.

17.What is global warming? Write any one harmful effect of global warming.

18.What is smog? How it is harmful?

19.Why do we need to filter water before drinking? Name any two water borne diseases.

20.List some sources of air pollutants

21.What is green house effect.

22.How does hot water act as pollutant?

<3M>

23.What are the causes of air pollution.

24.What is acid rain? How is it formed?

25.How can you conserve water?

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