Earth's first atmosphere was composed of
A) oxygen, hydrogen, and helium.
B) hydrogen and helium, with trace amounts of ammonia and methane.
C) gases from volcanic eruptions.
D) oxygen, water vapor, carbon dioxide, and methane.
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Question
Earth's first atmosphere was composed of
A) oxygen, hydrogen, and helium. B) hydrogen and helium, with trace amounts of ammonia and methane. C) gases from volcanic eruptions. D) oxygen, water vapor, carbon dioxide, and methane.
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