Paper 2: Early Atmosphere Flashcards
1
Q
What does scientist believes that the earths early atmosphere contained?
A
Little or no oxygen
Large amount of carbon dioxide
Water vapour
Small amounts of other gases
2
Q
What was the evidence behind scientist thinking of gases in the early atmosphere?
A
Mixture of gases released by volcanoes
The atmosphere of other planets in our solar system today
3
Q
How much of today’s atmosphere is nitrogen?
A
78%
4
Q
How much of the atmosphere is oxygen today?
A
21%
5
Q
How much of today’s atmosphere are other gases?
A
One percent
