Here's a breakdown:
* Crust: The outermost solid layer of Earth. It's relatively thin and divided into oceanic crust (thinner and denser) and continental crust (thicker and less dense).
* Upper Mantle: The layer beneath the crust, extending down to about 410 km (255 miles). It's mostly solid, but behaves more like a very viscous fluid over long periods.
* Lithosphere: This rigid outer layer of Earth includes the crust and the uppermost part of the upper mantle. It's broken into large plates called tectonic plates, which move and interact, causing earthquakes, volcanoes, and mountain formation.
Let me know if you have any more questions!
