Plates move because of the intense heat in the Earth's core that causes the molten material to move.Hot material rises upward and comes in contact with the Earth's crust.As materials cools, it becomes dense and sinks creating (1)_______.It moves like a conveyor belt moving the(2)________.Plates then move away from the(3)________with force called(4)________.Gravity pulls the surrounding rocks to pull away from the ridge.(5)________occurs to convection is sinking to cooler,more dense materials.As it sinks, it takes with it the older and denser crust.Gravity again does play a role that moves the plates downward.​