which gas was not party of the earth's atmosphere 3.6 billion yrs. ago?

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which gas was not party of the earth's atmosphere 3.6 billion yrs. ago?

A. Methane
B. Nitrogen
C. Oxygen
D. Water Vapor

2006-11-06 12:51:33 · 3 answers · asked by priyaa485 1 in Environment

3 answers

I really don't know, I'm not that old

2006-11-06 12:59:31 · answer #1 · answered by Anonymous · 0⤊ 1⤋

If there had been no vegetation at that time, I would vote for methane. Plants provide the mechanism by which carbon and hydrogen get together to make methane.

2006-11-06 23:02:14 · answer #2 · answered by Ed 6 · 0⤊ 1⤋

Oxygen. Without plants to produce it, it didn't exist. Without plants to replenish it, any that did exist would have reacted quite quickly.

2006-11-06 20:57:50 · answer #3 · answered by dm_cork 3 · 0⤊ 1⤋