The composition of Earth's atmosphere today is about 78% _____, 21% _____, and about 1% __________, with trace amounts of other gases.
A) oxygen; nitrogen; water vapor
B) nitrogen; carbon dioxide; oxygen
C) oxygen; carbon dioxide; nitrogen
D) nitrogen; oxygen; argon
E) nitrogen; oxygen; carbon dioxide
Correct Answer:
Verified
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A) is an element.
B) is a molecule
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A)
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