The early atmosphere and today’s atmosphere (AQA GCSE Chemistry Combined Science): Flashcards
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How long has Earth's atmosphere been stable?
How long has Earth's atmosphere been stable?
200 million years
Nitrogen % in today's atmosphere
Nitrogen % in today's atmosphere
78%
Oxygen % in today's atmosphere
Oxygen % in today's atmosphere
21%
When did Earth's early atmosphere form?
When did Earth's early atmosphere form?
4.6 billion years ago
Main gas in Earth's early atmosphere
Main gas in Earth's early atmosphere
Carbon dioxide ()
Oxygen in Earth's early atmosphere
Oxygen in Earth's early atmosphere
Very little or no oxygen
Source of early atmospheric gases
Source of early atmospheric gases
Volcanic activity
Fate of water vapour as Earth cooled
Fate of water vapour as Earth cooled
Condensed to form oceans
Fate of dissolved in oceans
Fate of dissolved in oceans
Formed carbonates, settled as sediment
% in Venus's atmosphere
% in Venus's atmosphere
96.5%
% in Mars's atmosphere
% in Mars's atmosphere
95.3%
Why early atmosphere evidence is limited
Why early atmosphere evidence is limited
4.6 billion years ago, few rocks survive
Gases released by early volcanic activity
Gases released by early volcanic activity
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