Here's a breakdown:
* Lithosphere: This is the rigid, outermost layer of Earth. It's made up of the crust (the thin, rocky outer layer) and the uppermost part of the mantle, a layer of hot, dense rock.
* Asthenosphere: Directly below the lithosphere lies the asthenosphere. This layer is partially molten and behaves more like a viscous fluid.
The lithosphere is broken into large pieces called tectonic plates. These plates move slowly over the asthenosphere, causing earthquakes, volcanic eruptions, and mountain building.
