Magnetism Lesson 1 Forces and Fields

A. Magnetic Poles-in a bar magnet, the two ends that are labeled North- South.

B. The end pointing north is called the North-seeking pole or north pole. This is usually the end painted red on a bar magnet.

C.Like poles repel (N-N) or (S-S) Unlike poles attract (N-S)

D. As poles move closer together, the force between them is stronger.

E. No matter how many times you break a magnet, you always have a complete magnet with a north pole and a south pole.

F. Magnetic Field-the area around the magnet where the magnetic force acts. This isn’t flat. It is three- dimensional.

G. The Earth has an imaginary bar magnet running along the Earth’s axis. Earth has a magnetic field that resembles the field of a gigantic bar magnet.