The circular motion is called convection current.
The convection is a current caused by warmer liquid rising and cooler liquid sinking.
Molecules
Convection
conduction because it heats everything
Convection currents push the plates around. These are the circulations of the magma in the mantle, caused by the cooler magma at the surface sinking lower into the mantle, heating up, and rising to the surface again. The circular motion acts kind of like a conveyor belt to move the crust about.
A convection current flows in a circular pattern, with warmer material rising and cooler material sinking (due to density differences). It should not be used with conveNtional current in electricty.
cycle
It tends to decrease as it mixes with cooler air underneath. (Meanwhile it warms up the cooler air it blends into).
A cooler area on the sun is called a sunspot
A convection current, however, this can also occur with gases.
An area on the sun that is cooler is called a sunspot.
They are called, sunspots.