The Earth's crust,which is between 10 and 125 miles thick,is one big solid mass that cover a molten iron core at the center of the planet.

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The Earth's crust is not one big solid mass, but rather is broken up into plates that move around due to tectonic activity. Additionally, while there is a molten outer core of the Earth, the inner core is actually solid due to high pressure.

The Earth's Crust,which Is Between 10 and 125 Miles Thick,is