Cause of Plate Tectonics

Question 1

Ridge Push

Answer 1

The plates move because of the force of gravity. Oceanic Lithosphere moves downhill under the force of gravity.

Question 2

Convection

Answer 2

Plates move b/c of temperature. Hot rock rises while cold rock sinks. Oceanic lithosphere moves sideways.

Question 3

Slab Pull

Answer 3

Plates move with the change of density. Oceanic lithosphere sinks and pulls the tectonic plate with it.