1. What was the composition of Earth's early atmosphere primarily characterized by?
2. Approximately how old is Earth's early atmosphere formation event?
3. What specific role did volcanic outgassing play in the formation of Earth's oceans?
Early atmosphere — main gases?
Primarily CO₂, water vapour, nitrogen, ammonia, methane.
Early Atmosphere — composition?
Mostly volcanic gases: CO₂, water vapour, nitrogen, ammonia, methane.
Oceans — formation process?
Condensation of water vapour as Earth cooled.
Oceans — formed by?
Water vapour condensed into liquid water.
Carbon cycle — key process?
Exchange of CO₂ among atmosphere, oceans, and rocks.
Carbon Cycle — role?
Recycles carbon among atmosphere, oceans, and rocks.
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