Match the following. Column A Column B 1) Nitrogen a. Interdependent in nature 2) Oxygen b. Carbon dioxide 3) Photosynthesis c. Decreases on heating 4) Windmill d. 21 % of air 5) Plants and animals e. Run flour mills 6) The solubility of air in water f. 78 % of air

The nitrogen is present in an abundant amount in the air ( 78 % ). It does not support the process of burning. The oxygen is present in the air ( 21 % ). It is produced during photosynthesis by green plants and is used by all organisms for respiration. Plants prepare food by the process called photosynthesis. They take carbon dioxide and give out oxygen in the atmosphere. Moving air is used to turn the blades of the windmill. It is used to run flour mills and to generate electricity. Plants use carbon dioxide, give out oxygen and animals use oxygen, give out carbon dioxide so their balance is interdependent in nature. Amount of air that can be dissolved in water decreases with temperature (heat) and increases with pressure. Column A Column B 1) Nitrogen f. 78 % of air 2) Oxygen d. 21 % of air 3)Photosynthesis b. Carbon dioxide 4) Windmill e. Run flour mills 5) Plants and animals a. Interdependent in nature 6) The solubility of air in water c. Decreases on heating

E M B I B E

Mastering SCIENCE Integrated with Environmental Education>Chapter 15 - Air Around Us>EXERCISES>Q A

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6th CBSE

IMPORTANT

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Burning of fuels produces _____.

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Important Questions on Air Around Us

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Mastering SCIENCE Integrated with Environmental Education>Chapter 15 - Air Around Us>EXERCISES>Q A

Which of the following is the clean fuel?

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Mastering SCIENCE Integrated with Environmental Education>Chapter 15 - Air Around Us>EXERCISES>Q B

Air is used for all organisms for _____.

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6th CBSE

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Mastering SCIENCE Integrated with Environmental Education>Chapter 15 - Air Around Us>EXERCISES>Q B

Moving air is called _____.

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6th CBSE

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Mastering SCIENCE Integrated with Environmental Education>Chapter 15 - Air Around Us>EXERCISES>Q B

Air is a _____ of gases.

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Mastering SCIENCE Integrated with Environmental Education>Chapter 15 - Air Around Us>EXERCISES>Q B

_____ proved that air is a mixture of gases.

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Mastering SCIENCE Integrated with Environmental Education>Chapter 15 - Air Around Us>EXERCISES>Q B

_____ (windmill/ thread mill) is used to draw water from tube wells.

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6th CBSE

IMPORTANT

Mastering SCIENCE Integrated with Environmental Education>Chapter 15 - Air Around Us>EXERCISES>Q C

Match the following.

Column A	Column B
1) Nitrogen	a. Interdependent in nature
2) Oxygen	b. Carbon dioxide
3) Photosynthesis	c. Decreases on heating
4) Windmill	d. $21 %$ of air
5) Plants and animals	e. Run flour mills
6) The solubility of air in water	f. $78 %$ of air