| A | B |
|---|
| lodestone | a natural magnetic rock; magnetite |
| magnet | any object with magnetic force pulling IRON toward it |
| poles | the parts of the magnet where the magnetic force is the strongest |
| attract | opposite poles of a magnet are drawn together; N-S |
| repel | same poles of a magnet push apart; N-N and S-S |
| permanent magnets | always have their magnetic force |
| temporary magnets | objects that lose their magnetic force |
| force | a push or a pull |
| balanced forces | forces that cancel each other out when acting together on a single object |
| unbalanced forces | cause a change in motion |
| contact forces | happen between objects that touch (pitcher touches ball to throw it) |
| non-contact forces | those forces that act on an object from a distance; gravity, magnetism |
| magnetic field | an area of magnetic force around a magnet; strongest at the poles |
