Final answer:
The two main driving forces of the rock cycle are Earth's internal heat engine and the hydrological cycle.
Explanation:
The two main driving forces of the rock cycle are Earth's internal heat engine and the hydrological cycle. Earth's internal heat engine moves material in the core and mantle, leading to changes in the crust, while the hydrological cycle involves the movement of water, ice, and air on the surface, powered by the sun.
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