Best 30+ MCQs on The Atmosphere of Earth for Competitive Exams.
The Earth’s atmosphere is divided into how many layers based on temperature?
Correct Answer: 5
The atmosphere has five layers based on temperature: Troposphere, Stratosphere, Mesosphere, Thermosphere, and Exosphere.
The first layer of the atmosphere is called ____.
Correct Answer: Troposphere
The Troposphere is the lowest layer of the atmosphere where weather phenomena occur.
The second layer of the atmosphere is called ____.
Correct Answer: Stratosphere
The Stratosphere lies above the troposphere and contains the ozone layer.
The third layer of the atmosphere is called ____.
Correct Answer: Mesosphere
The Mesosphere is the middle layer where most meteors burn upon entering Earth’s atmosphere.
The fourth layer of the atmosphere is called ____.
Correct Answer: Thermosphere
The Thermosphere contains the ionosphere and experiences very high temperatures.
The fifth layer of the atmosphere is called ____.
Correct Answer: Exosphere
The Exosphere is the outermost layer where atmospheric gases gradually merge into space.
The troposphere extends from 0 km to ____ km.
Correct Answer: 16
The Troposphere extends up to about 16 km from the Earth’s surface on average.
At the equator, the troposphere extends from 0 km to ____ km.
Correct Answer: 18
At the equator, the Troposphere extends up to about 18 km due to higher temperatures.
At the poles, the troposphere extends from 0 km to ____ km.
Correct Answer: 8
At the poles, the Troposphere extends only up to about 8 km because of cooler temperatures.
The Stratosphere extends from 16 km to ____ km.
Correct Answer: 50
The Stratosphere extends from about 16 km to 50 km above the Earth’s surface and contains the ozone layer.
The Mesosphere extends from 50 km to ____ km.
Correct Answer: 80
The Mesosphere extends from 50 km to 80 km and is where meteors burn up when entering Earth’s atmosphere.
The Thermosphere extends from 80 km to ____ km.
Correct Answer: 700
The Thermosphere stretches from about 80 km to 700 km and contains the ionosphere.
The Exosphere extends from 700 km to ____ km.
Correct Answer: 10,000
The Exosphere is the outermost layer of the atmosphere, extending up to about 10,000 km and merging into space.
Commercial aircraft fly in which layer of the atmosphere?
Correct Answer: Troposphere
Most commercial aircraft operate in the Troposphere, just below the Stratosphere.
Clouds are found in which layer?
Correct Answer: Troposphere
All clouds exist in the Troposphere, the layer closest to the Earth’s surface.
Life exists in which layer?
Correct Answer: Troposphere
Life exists in the Troposphere, which contains air, water, and suitable temperatures.
The ozone layer is found in which layer of the atmosphere?
Correct Answer: Stratosphere
The ozone layer, which protects Earth from harmful ultraviolet rays, is located in the Stratosphere.
Jet aircraft fly in ____ layer of the atmosphere.
Correct Answer: Lower Stratosphere
High-speed jet aircraft fly in the lower Stratosphere to avoid weather disturbances.
The temperature in the Troposphere decreases by ___ per kilometer.
Correct Answer: 6.5°C
In the Troposphere, temperature decreases by about 6.5°C per kilometer with increase in altitude.
The temperature at the upper end of the Troposphere is almost ____°C.
Correct Answer: -55
At the top of the Troposphere, the temperature is around -55°C.