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Components of air
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Air is essential for living................. like humans, animals and plants.
organism
78 percent of air is...............................
78 percent of air is nitrogen.
Plants need carbon dioxide in the............................... process.
photosynthesis
Name some other gases in the air besides nitrogen and oxygen.
Carbon dioxide, water vapour.........
Which gas is produced from the respiration of humans and animals?
Carbon dioxide.
Air is mainly composed by..............., ..............and small amount of some ..............
Air is mainly composed by oxygen, nitrogen and small amount of some gases.
Living organisms such as humans and animals need air for......................
Living organisms such as humans and animals need air for respiration.
21 percent of air is..............................
21 percent of air is oxygen
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