The two most abundant gases in the atmosphere are
A) water vapor and carbon dioxide.
B) nitrogen and water vapor.
C) nitrogen and oxygen.
D) oxygen and carbon dioxide.

Question

Quizplus · Accepted Answer

Nitrogen makes up about 78% and oxygen makes up about 21% of the Earth's atmosphere, making them the two most abundant gases. While water vapor and carbon dioxide are important greenhouse gases in the atmosphere, they are present in much lower concentrations than nitrogen and oxygen.

The Two Most Abundant Gases in the Atmosphere Are