Natural Resources -Air,water, and Land /6 th /General Science/Test-1

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your Good Name :- *

Name the following. Gases that are harmful to the ozone layer- *

2 points

Chlorofluorocarbon

Carbon tetrachloride

Nitrogen

Fill in the blank . Of the total water available on the earth , fresh water forms . . . . . Per cent *

2 points

0.5 percent

0.4 percent

0.3 percent

Fill in the blank. In fire extinguishers . . . . . gas is used *

2 points

Carbon dioxide

Oxygen

Nitrogen

The layer of ozone gas absorbs ………… rays that come from the sun to the earth. *

2 points

Blue rays

Both ______ and _______ constituents are present in the soil. *

2 points

biotic and abiotic

ozone and nitrogen

Genus and homo

How much is the proportion of the gases in the stratosphere? *

2 points

17%

16%

18%

19%

Match the following . *

8 points

Combustion

Plant and food production

Rain

Generation of soil

Carbon dioxide

Oxygen

Water vapour

Microbes

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