Chemistry, 12.08.2020 04:01 acoverupoze5th

How did Earth come to have an oxygen atmosphere?A. Precambrian rocks released oxygen into the atmosphere. B.Volcanoes released oxygen into the atmosphere. C.Early organisms created oxygen from other gases in the atmosphere. D.Oxygen was the primary gas originally in Earth's atmosphere.

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How did Earth come to have an oxygen atmosphere?A. Precambrian rocks released oxygen into the atmosp...

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