Question

Describe how heat is transferred from the core through the mantle to the crust?

Answer 1

Conduction and fluid convection transfers heat through mantle to the crust.

Answer 2

Conduction probably is the main method in the crust, but do not underestimate fluid convection. Every time you find a hot spring, then that is an example of fluid convection. ... Since these two are separate heat transfer from the outer core to the mantle is also mainly by conduction