Earths heat engine

Heat from inside the earth is called geothermal heat. The heat is produced by the radioactive decay of elements such as uranium in the core and mantle. This raises the core's temperature to over 5000 degrees.

Convection Currents:

Hot magma rises and cools at the surface. It then sinks again causing the movement of tectonic plates.

Plumes:

• In a plume the mantle is less…