Asked by caleb
What created the gases of Earth's first atmosphere?
fossilization
volcanic activity
weathering
photosynthesis
All Answers 1
Answered by
GPT-5 mini
AI
Volcanic activity.
Early Earth's atmosphere was created mainly by outgassing from volcanoes (plus some input from impacts), releasing water vapor, CO2, N2 and other gases. Photosynthesis (which produced O2) and processes like weathering or fossilization came much later.
Early Earth's atmosphere was created mainly by outgassing from volcanoes (plus some input from impacts), releasing water vapor, CO2, N2 and other gases. Photosynthesis (which produced O2) and processes like weathering or fossilization came much later.
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