Thermosphere facts for kids
The thermosphere is the fourth layer of the earth's atmosphere which lies directly above the mesosphere (middle layer) and directly below the exosphere (top layer). The name Thermosphere is taken from the Greek word thermos which means heat. It is hot because it absorbs ionizing radiation. Within this layer, ultraviolet radiation causes ionization. That is why it is also called the ionosphere. Shortwave radio waves can bounce off the Kennelly-Heaviside layer (ionosphere) and go to distant parts of the Earth. This layer is very helpful in radio communication.
Images for kids
Figure 2. Schematic meridian-height cross-section of circulation of (a) symmetric wind component (P20), (b) of antisymmetric wind component (P10), and (d) of symmetric diurnal wind component (P11) at 3 h and 15 h local time. Upper right pannel (c) shows the horizontal wind vectors of the diurnal component in the northern hemisphere depending on local time.
Thermosphere Facts for Kids. Kiddle Encyclopedia.