Here's a breakdown:

* Crust: This is the outermost layer of the Earth, and it's what we live on. There are two types of crust:

* Oceanic crust: Found beneath the oceans, it's thinner and denser than continental crust.

* Continental crust: This is the thicker and less dense crust that forms the continents.

* Uppermost Mantle: This is the rigid, solid portion of the mantle that sits directly below the crust. It's made of rock that is very hot but still solid due to immense pressure.

Together, the crust and the uppermost mantle make up the rigid, outermost layer of the Earth, known as the lithosphere. This layer is broken into several large pieces called tectonic plates, which slowly move over the softer, partially molten layer below called the asthenosphere.