Select the two gases that comprise the majority of the atmosphere.
A) argon
B) carbon dioxide
C) nitrogen
D) oxygen
E) carbon monoxide

Question

Quizplus · Accepted Answer

Nitrogen makes up 78% of the atmosphere and oxygen makes up 21%. While argon does compose a small part of the atmosphere (0.9%), it is not a majority. Carbon dioxide and carbon monoxide are present in much smaller amounts (0.04% and trace amounts, respectively).

Select the Two Gases That Comprise the Majority of the Atmosphere