christina2063 christina2063

05-03-2020
Biology

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what gas dominated earthed first atmosphere

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samanthadonley001 samanthadonley001

05-03-2020

Answer:(4.6 billion years ago)

As Earth cooled, an atmosphere formed mainly from gases spewed from volcanoes. It included hydrogen sulfide, methane, and ten to 200 times as much carbon dioxide as today's atmosphere.

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