1. Atmosphere: This is the outermost layer, a blanket of gases surrounding the Earth.

2. Crust: This is the thin, solid, rocky outer layer of the Earth. It's divided into oceanic crust (thinner and denser) and continental crust (thicker and less dense).

3. Mantle: The largest layer, it's made up of hot, dense rock that flows very slowly over millions of years. This flow is responsible for plate tectonics.

4. Outer Core: A liquid layer composed mostly of iron and nickel. It's incredibly hot and generates Earth's magnetic field.

5. Inner Core: A solid ball of iron and nickel, the innermost layer of the Earth. It's incredibly hot and under immense pressure.

Let me know if you'd like more details about any specific layer!