Earth’s Structure and Heat Transfer. The Layers of Earth’s Core. There are 7 layers of Earth’s inner workings These layers include crust, upper mantle, transition region, lower mantle, lithosphere, outer core, and the inner core
The crust is about 5 miles deep into the Earth from the bottom of the ocean, but 25 miles from the surface of a continent
The inner core is a solid portion of Earth that isn’t physically attached to the mantle, but is suspended by the molten outer core
In the core of the Earth, all three forms of the transfer of heat are used. Radiation from the inner core heats most of the planet, as does conduction from the touching of each layer (excluding the inner core). Convection currents take place inside the outer core and the mantle where the molten magmas move around. Finally, the crust, upper mantle, and transitional layers are all mostly or entirely solid, so heat passes between them from conduction.