The first step toward learning about plate tectonics is to learn about the Earth's interior structure. This lesson should address ... Earth is made of three main layers: crust, mantle, and core.

The Earth's interior is composed of four layers, three solid and one liquid—not magma but molten metal, nearly as hot as the surface of the sun. The deepest layer is a solid iron ball ...

The Earth is made up of different layers: Therefore, instead of tectonic plates moving because of the convection currents, evidence suggests it is the plates that drive the convection. Slab pull ...