attraction – The force that pulls things together, e.g. opposite poles of two magnets.
electromagnet – A magnet made by passing electricity through a coil of wire, which often has a core inside.
magnet – An object that has a magnetic field and can attract magnetic materials.
magnetic field – The area around a magnet where its magnetic force can be felt.
magnetic materials – Materials that are attracted to a magnet, e.g. iron, cobalt and nickel.
magnetism – The force(s) produced by a magnetic field.
poles – The parts of a magnet where its magnetic field is strongest.
relay – A circuit containing an electromagnet that is used to control another circuit.
repulsion – The force that pushes things away from each other, e.g. like poles of two magnets.