Electromagnetic radiation is made from two sorts of energy— electrical and magnetic. As the radiation moves outward from its source, its energy constantly changes from strong to weak and back…
Have you ever hunted for buried treasure? You could just start digging anywhere and hope that you would find something. Or you could use a metal detector to find out…
Part of an electromagnet is called a solenoid. A solenoid is a coil of wire that has an electric current flowing through it. When an electric current flows through a…
An ordinary bar magnet has a magnetic field around it all the time. We call this kind of magnet a permanent magnet. You can also make a magnet by wrapping…
The first explorers had very little to help them find their way around the world. Travelers used simple maps and learned how to find their way, or navigate, using the…
We live on a huge magnet! Around the earth is a giant magnetic field, just like the magnetic field around a bar magnet.Do you know what makes the earth magnetic? Very deep…
You can't see magnetism, but you can feel it working near a magnet.In the space around a magnet is a magnetic field. If you hold something made from magnetic material, such…
We use magnetism in so many ways that modern life would be impossible without it. We need magnetism to produce large amounts of electricity in power stations. There are magnets…