Question

why do why the plates move​

Answer 1

Answer:

the plates can be thought of like pieces of a cracked shell that rest on the hot, molten rock of Earth's mantle and fit snugly against one another. The heat from radioactive processes within the planet's interior causes the plates to move, sometimes toward and sometimes away from each other.

Explanation:

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Answer 2

One explanation for the movement of the Earth's crustal plates is believed to be convection currents which occur in the semi-molten mantle. ... These convection currents are created by heat from within the earth – much of which is generated by radioactive decay in the core.