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What was the source of the gases that formed Earth's atmosphere?

Question #151369. Asked by psnz.
Last updated Jul 03 2024.
Originally posted Jul 03 2024 8:05 PM.

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BigTriviaDawg star
Answer has 2 votes
BigTriviaDawg star
7 year member
1007 replies avatar

Answer has 2 votes.
Mainly from volcanoes! For the first several hundreds of millions of years, the Earth was a molten mass without an atmosphere.
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. After about half a billion years, Earth’s surface cooled and solidified enough for water to collect on it.

link https://forces.si.edu/atmosphere/02_02_01.html
Response last updated by BigTriviaDawg on Jul 03 2024.
Jul 03 2024, 8:07 PM
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