Three Possible Driving Forces Of Plate Tectonics
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Convection
Causes oceanic lithosphere to move sideways and away from the mid-ocean ridge because of hot rock expanding and rising and cool rock becoming dense and sinking
Ridge Push
Makes oceanic lithosphere slide downhill under the force of gravity
Slab Pull
Oceanic lithosphere is denser than the asthenosphere so the edge of the tectonic plate that contains oceanic lithosphere pulls the rest of the tectonic plate with it.
