The early atmosphere and today's atmosphere (AQA GCSE Chemistry): Flashcards
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How long has today's atmosphere been stable?
How long has today's atmosphere been stable?
About 200 million years
% nitrogen in today's atmosphere
% nitrogen in today's atmosphere
About 78% (roughly 4/5)
% oxygen in today's atmosphere
% oxygen in today's atmosphere
About 21% (roughly 1/5)
Main gas in Mars & Venus atmospheres
Main gas in Mars & Venus atmospheres
Carbon dioxide
When did Earth's atmosphere first form?
When did Earth's atmosphere first form?
About 4.6 billion years ago
Main gas in Earth's early atmosphere
Main gas in Earth's early atmosphere
Carbon dioxide
What did active volcanoes release?
What did active volcanoes release?
, , small amounts of and
How did oceans form?
How did oceans form?
Water vapour from volcanoes condensed as Earth cooled
What happened to early in atmosphere?
What happened to early in atmosphere?
Dissolved into newly formed oceans
% in Mars atmosphere
% in Mars atmosphere
About 95%
% in Venus atmosphere
% in Venus atmosphere
About 96%
Key factor making Earth's atmosphere unique
Key factor making Earth's atmosphere unique
Ability to form oceans which absorbed