Here's a quick breakdown of the Earth's layers:

1. Crust: The thin, outermost layer of the Earth. It's what we live on!

2. Mantle: The thickest layer, made up of hot, solid rock. It's about 1,800 miles thick and is where most of Earth's mass is found.

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

4. Inner Core: A solid ball of iron and nickel at the Earth's center.

Let me know if you'd like to know more about any of these layers!