Earth's atmosphere is primarily composed of
a. argon
b. oxygen
c. nitrogen
d. carbon dioxide user: air pressure with elevation.
a. increases
b. decreases
c. does not change

Which is the largest ethnic group in guinea? malinkéfula (correct)kissisoussouand another question. guinea has always had a stable government led by elected presidents.truefalse (correct)

Which is a result of the emission from the use of fossil fuel

Abird flies at a speed of 75 metres per second for 15 seconds, how far does the bird fly