Answer:
<u>The mesosphere</u> is the third layer of the atmosphere.
Directly above the stratosphere and directly below the thermosphere.
it extends from about 50 to 85 km (31 to 53 miles) above our planet.
Temperature decreases with height throughout the mesosphere. The coldest temperatures in Earth's atmosphere, about -90° C (-130° F), are found near the top of this layer.
<u>Ionosphere.</u> Earth's atmosphere contains a series of regions that have a relatively large number of electrically charged atoms and molecules. As a group, these regions are collectively called the ionosphere. The ionosphere is an atmospheric layer located at an altitude of about 50 kilometers and 500 kilometers.
There are three main regions of the ionosphere, called the D layer, the E layer, and the F layer. These regions do not have sharp boundaries, and the altitudes at which they occur vary during the course of a day and from season to season.
Explanation:
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