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Gravity. EVERYTHING depends on gravity.

Well, gravity and inertia.

Unless acted on by a force (such as gravity) things that are moving will keep moving until they bump into something else, and then everything keeps moving with the same total momentum.

Comments: Obviously, the internal heat of the Earth has a lot to do with movement in

the Earth's interior. In turn this can affect the surface by causing tectonic plate movements. So even the continents are slowly moving.

Gravity is clearly an important factor too, of course.

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11y ago

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