1. Crust: The outermost, thinnest layer of the Earth, composed of solid rock. It's divided into oceanic crust (thinner and denser) and continental crust (thicker and less dense).

2. Upper Mantle: A solid, but very hot and deformable layer, extending to a depth of about 410 km. It's made up of mostly silicate minerals.

3. Transition Zone: A relatively narrow zone between the upper and lower mantle, where the mineral structure changes due to increasing pressure.

4. Lower Mantle: Extends from about 410 km to 2,891 km, containing a solid, but very hot and dense layer of rock.

5. Core: The innermost layer of the Earth, composed of a solid inner core and a liquid outer core. The core is primarily made of iron and nickel, with a very high density.

It's important to note that these layers are not distinct boundaries, but rather gradual transitions in composition and physical properties.