Here's a breakdown:
* Lithosphere: This is the rigid, outermost layer of the Earth. It's made up of the crust and the uppermost part of the mantle. The lithosphere is divided into large pieces called tectonic plates.
* Asthenosphere: This is a soft, partially molten layer beneath the lithosphere. The tectonic plates "float" on the asthenosphere.
So, the lithosphere is the part of the Earth that's broken into tectonic plates, and the movement of these plates is what drives many of the Earth's geological processes like earthquakes, volcanoes, and mountain formation.
