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15
×
What human activity adds the most carbon dioxide to the atmosphere?
Driving cars â
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15
×
What is the process where water vapor turns into liquid?
Condensation â
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15
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What is nitrogen fixation?
Converting nitrogen gas into usable compounds â
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15
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What causes water to rise into the atmosphere?
Heat from the Sun â
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baam
Lose 25 points!
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fairy
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5
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20
25
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gift
Win 15 points!
Okay!
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banana
Go to last place!
Oops!
15
×
What process in the water cycle turns liquid water into vapor?
Evaporation â
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×
seesaw
Swap points!
Oops!
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seesaw
Swap points!
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gift
Win 25 points!
Okay!
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thief
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25
15
×
Carbon in animals returns to the soil when they:
Die and decompose â
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15
×
Which organisms absorb carbon dioxide during photosynthesis?
Plants â
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×
boom
Lose 50 points!
Oops!
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magnet
Take 25 points!
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×
gift
Win 20 points!
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thief
Give points!
5
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15
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25
15
×
How do plants absorb nitrogen?
From nitrates in the soil â
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15
×
Which gas is most involved in the carbon cycle?
Carbon dioxide â
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