GK Question: Atmospheric Layers for Competitive Exam
1. Troposphere
•
Extends from the Earth's surface to about 20
km of height.
•
All weather phenomenon occurs in
this region
•
The height of the troposphere varies from the
equator to the poles increasing towards the equator.
•
The temperature in the troposphere decreases
with height.
•
The transition boundary between the
troposphere and the layer above is called the tropopause.
2. Stratosphere
•
Extends from the top of Troposphere to about
50 km above Earth's surface.
•
The temperature increases with height.
•
The transition boundary between the
stratosphere and the mesosphere is called the stratopause.
•
The ozone layer is found in the
lower portion of the stratosphere.
3. Mesosphere
•
Extends from the top of Stratosphere to about
85 km above Earth's surface.
•
Most of the meteors burn up in this
layer.
•
The temperature decreases with height.
•
The transition boundary between the mesosphere
and the thermosphere is called the mesopause.
4. Thermosphere:
•
Extends from the top of Mesosphere to about
600 km above Earth's surface.
•
Auroras are formed in this layer.
•
The ionosphere is a layer within the
thermosphere.
•
The temperature increases greatly with height
reaching upto 2000° at the top of the layer.
5. Exosphere:
•
Extends from the top of Thermosphere to about
10000 km above Earth's surface.
•
Satellites orbit the earth in this
layer.