Here's a breakdown:

* Lithosphere: This is the rigid outer layer of the Earth, composed of the crust and the uppermost part of the mantle. It's broken into tectonic plates that move and interact, causing earthquakes, volcanic eruptions, and mountain formation.

* Crust: This is the outermost layer, relatively thin and composed of various types of rock. It's further divided into oceanic crust (thinner and denser) and continental crust (thicker and less dense).

* Mantle: This is a thick layer of hot, dense rock that lies beneath the crust. The upper part of the mantle is solid but behaves like a very viscous fluid over long periods, allowing the tectonic plates to move.

It's important to note that the Earth's interior is not entirely solid. While the lithosphere is solid, the deeper layers of the mantle and the core are mostly molten or even solid with extreme pressure.