The Atmosphere Today Flashcards
1
Q
How is the atmosphere today ?
A
By 200 million years ago , the proportions of gases in the earths atmosphere had stabilised . These were much of the same as they are today .
2
Q
What are the percentages of gases in the atmosphere today?
A
Nitrogen = 78%
Oxygen = 21%
Argon = 0.9%
Carbon dioxide = 0.04%
