Here's a bit more about the Earth's layers:

* Crust: The thin, rocky outer layer of the Earth. It's divided into oceanic crust (thinner and denser) and continental crust (thicker and less dense).

* Mantle: A thick layer of mostly solid rock that lies beneath the crust. It's hotter and more fluid than the crust, and its movement drives plate tectonics.

* Outer Core: A liquid layer of iron and nickel. It's responsible for generating Earth's magnetic field.

* Inner Core: A solid ball of iron and nickel at the Earth's center. It's extremely hot and under immense pressure.