A Current in the mantle that occurs when hotter, less dense material rises, cools, and them sinks again. This current is believed to be one of the driving forces behind tectonic plate movement.
A German scientist who proposed the idea or theory of continental drift (1880-1930)
Fifteen large pieces of earth's crust that move due to convection currents.
Center of Earth
Wegener's theory that a super continent split apart and the pieces drifted to their present locations.
The thin solid outermost layer of the Earth above the mantle.