The Earth: Everyone’s favorite nested

sphere

Earth’s magnetic field is probably generated by the motion of the highly conducting liquid Outer Core

Motion in the Outer

Core

From: Arnou

Mantle Convection and Plumes•Convection at ocean ridges cools the mantle•Mantle plumes (hot spots) cool the liquid core

This means:•The function of plate tectonics is to cool the mantle!•The function of plumes is to cool the core!

Atmosphere

From NASA

Created by Nicolas Barth2007Geology 114AUniversity of California, Santa BarbaraSome images herein borrowed from websites have not been credited