The plastic layer below the lithosphere.

Continents have moved slowly to their current locations.

The cycle of heating, rising, cooling, and sinking.

When the crust and a part of the upper mantle are combined.

A large landmass which means "all land."

Move on a plasticlike layer of the mantle.

Earths crust and part of the upper mantle are broken into sections.

Hot material below earths crust rises toward the surface at the mid-ocean ridges.