The main content of the Earth’s outer core is primarily composed of liquid iron and nickel, along with lighter elements such as sulfur and oxygen. This layer lies beneath the mantle and surrounds the inner core. The outer core is crucial for generating Earth's magnetic field through the process of convection, where the movement of the molten metal creates electric currents. These electric currents give rise to the geomagnetic field that protects the planet from solar radiation. The outer core's fluid dynamics and composition play a significant role in the overall geodynamic processes of the Earth.