Magnetism is a force that attracts some objects to other objects. We cannot see it, but it is all around us since the Earth itself is a magnet. Most magnets are pieces of metal, especially iron, that can pull other metal objects towards it. The force is present as a magnetic field around a magnet.

Magnetic poles

The magnetic field is strongest at two areas called the north and south poles. The north pole of one magnet attracts the south pole of another magnet. This is called magnetic attraction. But it pushes away or repels the other magnet’s north pole. This is called magnetic repulsion. The rule is that unlike poles attract, like poles repel.

The north pole of a compass needle points to the Earth's North Magnetic Pole from all parts of the globe.

Uses of magnets

Magnets of different sizes and shapes have hundreds of uses, from holding notes on a refrigerator to being vital parts in electrical generators, motors and loudspeakers. A scrapyard crane uses a powerful magnet called an electromagnet to pick up and drop heavy metal items.

Maglev trains use magnetic repulsion to enable them to float just above a rail. They can go much faster than ordinary trains.