The Earth's outer core is a vast layer of liquid, metallic iron and nickel that encircles the planet's solid inner core. Its primary function in the geodynamo model is to circulate conductive fluids through the planet, generating the Earth's magnetic field. Due to the intense heat and pressure, the material exists in a liquid state, undergoing convection currents. These movements are responsible for the generation of the magnetic field lines that protect the planet from harmful solar radiation. The composition of the outer core is fundamentally different from the solid mantle above it, representing a critical zone of physical and electromagnetic activity deep within the planet.