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Evolution Of Atmosphere > Atmosphere > Flashcards

Atmosphere Flashcards

1
Q

Present composition?

A

Nitrogen

Oxygen

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2
Q

First stage?

A

Loss of primordial atmosphere

Early atmosphere - hydrogen and helium

Stripped - solar winds

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3
Q

2nd stage?

A

Hot interior of earth
Cooling of earth
Degassing

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4
Q

3rd stage?

A

Modified - photosynthesis
Continuous volcanic eruptions - water vapour ,gases
Watervapour ———> rain —->CO2 dissolved

Rainwater —— ocean depressions

Ocean - oxygen because of photosynthesis
Oceans - saturated with oxygen , flooded Oxygen to atmosphere

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Evolution Of Atmosphere (7 decks)

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