The mantle lies underneath the the crust. It makes up about 80 percent of the Earth's volume. It's what happens when you boil water and the molecules begin to move around because of the heat that has been added. The ourtermost and thinnest layer of the Earth is called the crust. It is made up of hard, strong rock.
Convection makes the asthenosphere possible for it to move and trasport energy.
The lithosphere sits on top of this plastic material .