Question

What two forces are responsible for tectonic plate motion?

Answer 1

Lithospheric plates are part of planetary thermal convection system.  

Energy source for plate tectonics is Earth’s internal heat while forces moving the plates are “ridge push” and “slab pull” gravity forces.  

Forces responsible for Plate Tectonics motion includes:

Convection in Mantle,

Ridge push (gravitational force at widened edges),

Slab pull (gravitational force inside subduction zones)

Answer 2

The forces that drive Plate Tectonics include:

Convection in the Mantle (heat driven)

Ridge push (gravitational force at the spreading ridges)

Slab pull (gravitational force in subduction zones)

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