Question

what is the coolest layer of atmosphere?​

Answer 1

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mesosphere

mesosphere is the coolest layer of atmosphere.

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More information :

The mesosphere is the third layer of the atmosphere, directly above the stratosphere and directly below the thermosphere. In the mesosphere, temperature decreases as altitude increases.

Answer 2

Answer:

here is your answer

Explanation:

mesosphere..

Most meteors burn up in the mesosphere. Unlike the stratosphere, temperatures once again grow colder as you rise up through the mesosphere. The coldest temperatures in Earth's atmosphere, about -90° C (-130° F), are found near the top of this layer.