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atmosphere #1

vocab for "what is air" and "carbon cycle"

QuestionAnswer
what is air mixture of several invisible gases
what is oxygen a flammable gas that makes up 21% of our air
what is nitrogen a non-flammable gas that makes up 78% of our air
what is a cycle a series of actions that repeats over and over
what is the carbon cycle when CO2 and O2 constantly circulate among plants, animals, and the air
what is combustion a chemical reaction fuel + O2 = energy(fire) + CO2
Created by: missostertag
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