Earth is like a giant magnet in several ways. Not only does it have a magnetic north and south pole that act similarly to the poles on bar magnets, but the planet is surrounded by a strong magnetic field, which is electrically charged and able to interact with magnetized matter.Know More
The Earth's magnetism is a direct result of a process called the dynamo effect. In the dynamo effect, the Earth's solid core transfers heat through the molten outer core and up to the surface of the planet via convection, according to Why Do. This causes the liquid part of the core to move, which results in an electrical current. The movement of the Earth as it orbits and spins keeps the liquid core, which is made up of primarily iron and nickel, in constant motion as well. This is why the magnetic force never falters or gets weaker.
Interestingly, most planets and moons are not as magnetic as Earth, which makes the planet unique and interesting in many ways. In fact, most heavenly bodies have very little or no magnetic properties. This is just one of the ways that the planet Earth stands out among the planets, moons and stars in the solar system.Learn more about Magnetism
The ends of a magnet are called the poles. Each magnet has a north pole and south pole. Magnetic fields have field lines, which begin at the north pole of a magnet and end at the south pole.Full Answer >
Magnets are made from magnetic materials, or metals that are attracted to a magnet and can be magnetized. They come from metal elements or alloys. Magnets are capable of producing magnetic fields, and they attract metals such as cobalt, iron and nickel.Full Answer >
Lead is not magnetic in the sense that it is neither attracted to nor repelled by a magnet. Lead cannot be charged up via contact with a magnet unlike what happens with many other metal objects, such as nails, staples and iron shavings.Full Answer >
One example of a magnet is a refrigerator magnet. These are also called permanent magnets because they always retain a certain degree of their magnetism. There some other general categories for magnets, such as temporary magnets and electromagnets.Full Answer >