MCQ on Atmosphere for Competitive Exams 2024

Test your knowledge with this mcq on atmosphere! How well do you understand the composition and layers of our Earth’s protective shield.

MCQ on Atmosphere

1. What is the most abundant gas in Earth’s atmosphere?

a) Oxygen

b) Nitrogen

c) Carbon dioxide

d) Argon

2. Which layer of the atmosphere is closest to the Earth’s surface?

a) Troposphere

b) Stratosphere

c) Mesosphere

d) Thermosphere

3. The ozone layer is found in which atmospheric layer?

a) Troposphere

b) Stratosphere

c) Mesosphere

d) Thermosphere

4. What is the primary function of the ozone layer in the atmosphere?

a) Absorbing ultraviolet (UV) radiation

b) Facilitating photosynthesis

c) Regulating temperature

d) Generating rainfall

5. Which gas is responsible for the greenhouse effect in the atmosphere?

a) Oxygen

b) Nitrogen

c) Carbon dioxide

d) Helium

6. The layer of the atmosphere where weather phenomena occur is:

a) Troposphere

b) Stratosphere

c) Mesosphere

d) Thermosphere

7. In which layer aeroplane fly?

a) Troposphere

b) Stratosphere

c) Mesosphere

d) Thermosphere

8. Which gas is essential for respiration and is part of the Earth’s atmosphere?

a) Nitrogen

b) Oxygen

c) Carbon dioxide

d) Methane

9. The boundary between the stratosphere and the mesosphere is known as:

a) Tropopause

b) Stratopause

c) Mesopause

d) Thermopause

10. The main constituents of atmosphere are?

a) 21% oxygen, 78% nitrogen, 1% other gases

b) 78% oxygen, 21% nitrogen, 1% other gases

c) 50% oxygen, 50% nitrogen

d) 99% oxygen, 1% nitrogen

Also see- MCQ on Solar System