Atmosphere MCQs Quiz Test Questions with Answers

Atmosphere | Environment | Meteorology

Atmosphere (or Air) related Multiple Choice Questions (MCQs). Earth’s atmosphere and the 5 layers of the Earth’s atmosphere quiz.

Atmosphere MCQs

1. The 99% of the Earth’s atmosphere consists of
(A) Oxygen
(B) Nitrogen
(C) Oxygen and Nitrogen
(D) Nitrogen and Water

2. By volume, Earth’s atmosphere (or air) contains about _____% of Nitrogen and _____% of Oxygen.
(A) 78,   21
(B) 21,   78
(C) 70,   25
(D) 25,   70

3. The lowest layer of Earth’s atmosphere (the closest to the surface of the Earth) is
(A) thermosphere
(B) troposphere
(C) stratosphere
(D) mesosphere

1. (C) Oxygen and Nitrogen
2. (A) 78,   21
3. (B) troposphere

Atmosphere MCQs