Question

3. Why is the thermosphere also called ionosphere​

Answer 1

Answer:

The name ionosphere comes from the fact that gases in these layers are excited by solar radiation to form ions, which have an electrical charge.

The thermosphere is the layer in the Earth's atmosphere directly above the mesosphere and below the exosphere. Within this layer of the atmosphere, ultraviolet radiation causes photoionization/photodissociation of molecules, creating ions; the thermosphere thus constitutes the larger part of the ionosphere.

Answer 2

Answer:

What is the ionosphere? The ionosphere is a very active part of the atmosphere, and it grows and shrinks depending on the energy it absorbs from the Sun. The name ionospherecomes from the fact that gases in these layers are excited by solar radiation to form ions, which have an electrical charge.