How is earth a magnet?

 How is earth a magnet?

The Earth is a magnet because it has a magnetic field caused by the motion of molten iron in its core. The Earth's core is made up mostly of iron and nickel, which are both magnetic materials. The movement of this molten metal creates electrical currents, which generate the magnetic field. This field is strongest at the poles and weakest at the equator, and it is what causes compasses to point north. The Earth's magnetic field also helps to protect the planet from the solar wind, a stream of charged particles that flows from the Sun.