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How do scientists believe our atmosphere was formed?

User Sssilver
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Answer:

Its early atmosphere was probably formed from the gases given out by volcanoes. It is believed that there was intense volcanic activity for the first billion years of the Earth's existence.

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According to scientists The Earth was formed about 4.5 billion years ago.

User Matthew Walton
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En la primera etapa, la atmósfera se conformó con emanaciones volcánicas, como el vapor de agua, el dióxido de carbono y de azufre, y el nitrógeno. En este punto, el oxígeno estaba apenas presente. En la segunda etapa, al enfriarse la Tierra, el vapor de agua se condensó y formó los océanos.

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User Ethrbunny
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