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Which of the following were the main gases in the initial atmosphere of Protoearth?

+2 votes

[A] Hydrogen and Helium
[B] Nitrogen and Carbon Dioxide
[C] Hydrogen and Nitrogen
[D] Oxygen and Carbon dioxide

posted Dec 28, 2016 by Prachi

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1 Answer

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The answer: is [A]. Hydrogen and Helium.

The initial atmosphere, composed mostly of hydrogen and helium, was later driven off into space by intense solar radiation.

answer Dec 29, 2016 by George Davros
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