Using full detail, describe the theory of plate tectonics.
using full detail, describe what is happening that causes tectonic plates to move.

Plate tectonics is a scientific theory that describes the large-scale motion of Earth's lithosphere. Plates at our planet’s surface move because of the intense heat in the Earth’s core that causes molten rock in the mantle layer to move.

Here's a link if you need more help: http://www.livescience.com/37706-what-is-plate-tectonics.html

Ijust took the quiz. their is no coefficient needed. : )