Re: Flat Earth and Hollow Earth Theories
The Earth's mantle is molten. The core is at the center of that, where the pressure of all the mass outside of it finally forces the material back into the solid phase. It's a solid floating in a fluid which is, itself, contained within another solid (the crust).
It's a lot like filling a bowl with molasses, putting a baseball inside the bowl, and then spinning the baseball (except that the impetus for motion is the core's inertia rather than coming from the outside).
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Last edited by Frothingslosh; 12-06-2018 at 03:11 PM.