There are two types of crust:

* Continental crust: This is the thicker, less dense crust that makes up the landmasses.

* Oceanic crust: This is the thinner, denser crust that forms the ocean floor.

While the crust is the outermost layer, it's important to remember that the Earth is made up of several layers:

1. Crust: The solid, rocky outer layer.

2. Mantle: A thick layer of hot, dense rock that makes up the majority of Earth's volume.

3. Outer Core: A liquid layer of iron and nickel.

4. Inner Core: A solid sphere of iron and nickel, incredibly hot and dense.