How is the core in earth magnetic?

The Earth's core is thought to be composed mainly of iron and nickel, and its magnetic properties arise from the movement of these molten metals. As the outer core flows, it generates electric currents through a process known as the dynamo effect, which in turn produces a magnetic field. This magnetic field extends beyond the surface of the Earth and is responsible for phenomena such as the magnetic poles and the auroras. The combination of rotation and convection currents in the molten outer core is crucial for maintaining the Earth's magnetic field.