Answer : There are 5 layers of atmosphere surrounding the Earth
1 stratosphere
2 thermosphere
3 mesosphere
4 exosphere
5 troposphere
the last layer of atmosphere surrounding Earth is troposphere it has 17 km thickness in equatorial zone and 7 km in the poles
It is the first atmospheric layer closest to earth's surface.
It is the region where weather occurs.
The temperature of the troposphere decreases with an increase in height.
