Earth’s Interior Structure

Earth’s interior consists of three main layers: the crust, mantle, and core. The crust is the thin, solid outer shell where we live. Beneath it is the mantle, a thick, semi-solid layer of hot, flowing rock that can slowly move over time. At Earth's center lies the core, made of extremely hot, dense metal—primarily iron and nickel—that is divided into a liquid outer core and a solid inner core. These layers work together to produce Earth’s magnetic field and drive geological processes like plate movement and volcanic activity.