The Evolution of the Atmosphere Flashcards
1
Q
how did volcanoes build up our atmosphere?
A
they released nitrogen as well as water vapour and small amounts of methane and ammonia
2
Q
what happened when the water vapour condensed?
A
it formed oceans
3
Q
how was lots of carbon dioxide removed from the early atmosphere?
A
it dissolved into the oceans and went through a series of reactions to from carbonate precipitates
4
Q
when did algae evolve?
A
around 2.7 billion years ago
