1. Crust: This is the outermost layer, the thin, solid, and rocky shell that we live on. It's like the skin of an apple. There are two types of crust: oceanic crust (found under the oceans) and continental crust (found under land masses).

2. Mantle: This is the thickest layer of the Earth, made up of hot, dense rock that is semi-solid. It's like the fleshy part of an apple. It's constantly moving in a process called convection, which drives plate tectonics.

3. Core: This is the Earth's innermost layer, made up mostly of iron and nickel. It's like the core of an apple. It's divided into two parts:

* Outer Core: Liquid iron and nickel, generating Earth's magnetic field.

* Inner Core: Solid iron and nickel, incredibly hot and under immense pressure.