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20
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Living organisms such as humans and animals need air for......................
Living organisms such as humans and animals need air for respiration.
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25
×
Air is mainly composed by..............., ..............and small amount of some ..............
Air is mainly composed by oxygen, nitrogen and small amount of some gases.
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15
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78 percent of air is...............................
78 percent of air is nitrogen.
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20
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Which gas is produced from the respiration of humans and animals?
Carbon dioxide.
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×
seesaw
Swap points!
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gift
Win 20 points!
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shark
Other team loses 25 points!
Okay!
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lifesaver
Give 25 points!
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15
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21 percent of air is..............................
21 percent of air is oxygen
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25
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Plants need carbon dioxide in the............................... process.
photosynthesis
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25
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Name some other gases in the air besides nitrogen and oxygen.
Carbon dioxide, water vapour.........
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20
×
Air is essential for living................. like humans, animals and plants.
organism
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×
baam
Lose 15 points!
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star
Double points!
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rocket
Go to first place!
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banana
Go to last place!
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