Question

An object is located at a height of $18km$ from the surface of earth. The object is located in:
A. stratosphere
B. mesosphere
C. ionosphere
D. thermosphere

Answer 1

The atmosphere is covered by layers based on temperature. These layers are named as the troposphere, stratosphere, mesosphere and thermosphere and ionosphere, etc.

Complete answer
Different types of temperature make different layers across the atmosphere. The troposphere is created due to the heat from the ground, so temperature decreases with height from the earth’s surface. Because heated air is lighter than a normal layer and so it rises and cool air sinks down, the troposphere is therefore unstable in nature. In the stratosphere, temperature is also increased with the height from earth’s surface.Below mentioned are the distances of different atmospheric layers from the Earth surface, in Stratosphere layer cloud particles could be water which contain sulfuric acid droplets and nitric acid hydrates in solid form. examinations of the Antarctic ozone hole have exposed that these clouds are responsible to play an important role in the depletion of the ozone layer in the stratosphere.
The Exosphere layer in the atmosphere ranges from $700 - 10000\,km$ approx. $\left( {440 - 6200\,miles} \right)$, Thermosphere in the atmosphere ranges from $80 - 700\,km$ approx. $(50 - 440\,miles)$, Mesosphere in the atmosphere ranges from $50 - 80\,km$ approx. $(31 - 50\,miles)$, Stratosphere in the atmosphere ranges from $12 - 50\,km$ approx. $(7 - 31\,miles)$ and lastly Troposphere in the atmosphere ranges from $0 - 12\,km$ approx. $(0 - 7\,miles)$

**Therefore, the correct answer is A. stratosphere.

Note: **
The main thing about the stratosphere is where we find the most important ozone layer. The ozone layer provides protection from harmful ultraviolet radiations i.e, $(UV)$ from the sun. The ozone layer absorbs the maximum amount of the $(UV)$radiation from the sun. Life we live is impossible without the ozone layer ${O_3}$ of protection.