Which gas was generally absent from the atmosphere at that time?

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Which gas was generally absent from the atmosphere at that time?

Earths early atmosphere formed during the Early Archean Era. So which one is the answer
a) water vapor
b) nitrogen
c) carbon dioxide
d) oxygen

2006-07-07 03:28:29 · 2 answers · asked by chantimimi 1 in Science & Mathematics ➔ Earth Sciences & Geology

2 answers

d) Oxygen. No plants yet, so nothing to put the O2 up there!

2006-07-07 03:33:13 · answer #1 · answered by QFL 24-7 6 · 0⤊ 0⤋

d) oxygen. This gas only became truly prevalent after the first algae began to metabolize CO-2, and even then it was a toxic substance. Most good geology/earth science textbooks will explain this further.

2006-07-07 03:45:49 · answer #2 · answered by stevenB 4 · 0⤊ 0⤋