Multiple Choice
The percentages of various gases in the atmosphere indicate that the composition of the atmosphere is controlled
A) totally by the amount and type of gases given off during volcanic eruptions.
B) totally by the composition of comets and meteors that strike Earth.
C) to a significant extent by biological processes occurring on Earth.
D) exclusively by chemical reactions between sunlight and the gases in the atmosphere.
Correct Answer:
Verified
Correct Answer:
Verified
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