stud
bud
Sign up
Log in
Home
Library
Explore
SAT
More
AP Environmental Science Unit 4 Earth Systems Flashcards | StudBud
AP Environmental Science Unit 4 Earth Systems
1 / 20
The atmosphere is composed of what main gases?
A
78% Nitrogen, 21% Oxygen, 1% Other
B
78% Oxygen, 21% Nitrogen, 1% Other
C
100% Oxygen
D
78% Hydrogen, 21% Oxygen, 1% Other
Next
0
0
correct · 0:00
