Pollution of air and water Worksheet-9

Pollution of air and water Worksheet-9

True/False:

1. Only 10% of atmosphere spreads up to about 30 kilometres from the surface of the sea.

2. In dry air, from volume point, nitrogen (N₂) is 78% and oxygen is 21%.

3. Substances polluting air, water and earth are called pollutants.

4. Photochemical oxidants are produced on reaction of carbons and oxides

5. Air pollution causes increased Blood pressure in Human.

6. Industrial area should be kept away from human residence.

7. Instead of CNG, other fuels like petrol and diesel should be used for our vehicle

8. Solar energy is an alternative energy resources.

9. Plants have great contribution in controlling balance of gases in atmosphere.

10. Oxygen has property to absorb infrared rays coming from earth’s surface.

11. Snow in the Antarctica starts melting due to global warming.

12. Green house effect of earth is responsible for global warming.

13. Oxygen and nitrogen are green house gases.

14. CFCs are responsible for ozone depletion.

15. Skin cancer is major cause of global warming.

16. Acid rain increases soil fertility.

17. Sulphuric acid and nitric acid are present in the form of small drops in rain water.

18. Acid rain enhances the process of photosynthesis.

19. Heat from industries and power plants causes water pollution.

20. Excessive nutrients from sewage and fertilizers cause excessive growth of weeds that harms population of aquatic life forms and navigation.

21. Eutrophication is a negative effect of soil pollution.

Answer:

1. False: 99% of atmosphere spreads up to about 30 kilometres from the surface of the sea.

2. True

3. True

4. False: Photochemical oxidants are produced on reaction of hydrocarbons and oxides

5. True

6. True

7. False: Instead of petrol and diesel, other fuels like CNG should be used for our vehicle

8. True

9. True

10. False: Carbon dioxide has property to absorb infrared rays coming from earth’s surface.

11. True

12. True

13. False: carbon dioxide and methane are green house gases.

14. True

15. False: Skin cancer is major cause of ozone depletion.

16. False: Acid rain decreases soil fertility.

17. True

18. False: Acid rain slows down the process of photosynthesis

19. True

20. True

21. False: Eutrophication is a negative effect of water pollution.