Height of stratosphere above Earth’s surface on (km) is:
A. 0-10
B. 10-50
C. 50-85
D. 85-100

Hint: We know, the gaseous area surrounding the planet is divided into several layers. There are 7 layers of atmosphere, extending from 8 km to 10,000 km. The stratosphere is the second layer of atmosphere.

Complete step by step answer:
a) As we know, about 99% of the total atmospheric mass is concentrated in the first 32 km above Earth’s surface. Humans live in the troposphere and all changes in the weather occurs in this layer.
b) Now, if we see the options first range is 5-10 km, it is the first atmospheric layer i.e. Troposphere, closest to the planet.
c) The second option is 10-50 km, this range is of the second layer of the atmosphere, i.e. Stratosphere. The ozone layer is centred in this range. Ozone layer absorbs much of the ultraviolet radiation emitted by the sun.
d) The third option is 50-85 km, this range is of the third layer, i.e. mesosphere, the coldest temperatures in Earth’s surface occur at the top of this layer.
e) Now, talking about the fourth option i.e. 85-100 km, it is the range of the fourth layer i.e. thermosphere. It is often considered as the hottest layer in the atmosphere.

So, we can conclude that the height of the stratosphere above Earth’s surface on (km) is 10-50 km. The correct option is B.

Note: Sometimes, the range is given in the terms of miles, then the range of layers extending above the Earth’s surface vary. The value for miles, and km will be different. The stratosphere extends above the Earth’s surface up to 31 miles.