Did You Know?
The north and south ends of the Earth are called the north and south poles. Because of the Earth’s iron-nickel core, the Earth itself acts as a magnet with two poles and an enormous magnetic field.
When you brought the two magnets close to each other, you may have noticed that the car began to move. This is because when like poles of two magnets are brought together, the magnets repel — the magnetic fields push away from each other. The magnet attached to the car was pushing away from the magnet in your hand, making the car appear to move on its own.
Magnets have an invisible force by which they can attract or repel certain objects. This invisible force is called a magnetic field. It attracts metallic materials like iron and attracts or repels other magnets. This magnetic field gives a magnet two “poles” — north and south. Placing opposite poles together causes magnets to attract. Placing like poles together causes magnets to repel.