Presently,the Earth's atmosphere is dominated by which two gases?
A) hydrogen and helium
B) oxygen and carbon dioxide
C) nitrogen and oxygen
D) carbon dioxide and sulfur dioxide

Question

Quizplus · Accepted Answer

Nitrogen and oxygen are the two dominant gases in Earth's atmosphere, making up approximately 78% and 21% of the atmosphere, respectively. Other gases, including carbon dioxide and helium, make up a very small percentage of the atmosphere.

Presently,the Earth's Atmosphere Is Dominated by Which Two Gases