| A | B |
|---|
| borealis | northern lights |
| magnetosphere | extent of Earth's magnetic field in space |
| field | a region in which other objects are affected by the magnet_______ |
| domain | a group of aligned atoms with a single magnetic field |
| magnetism | invisible force that causes a magnet to attract certain objects to itself |
| line of force | imaginary lines that represent the magnetic field |
| australis | southern lights |
| ferromagnetic | substances like iron that are strongly magnetic |
| lodestones | naturally occurring magnets composed of a form of iron ore called magnetite |
| poles | two points on a magnet where its magnetism is concentrated |
| temporary magnet | a magnet made from magnetically "soft" substances;quickly loses it magnetism |
| Van Allen radiation belts | two vast doughnut-shaped belts which trap particles of the solar wind that penetrate the magnetosphere |
| permanent magnet | a magnet made from magnetically "hard" substances; retains its magnetism |
| magnetization by electricity | temporary magnetization by electrical current |
| magnetization by induction | temporary magnetization caused by bringing an object within the magnetic field of a magnet |
| magnetization by contact | magnetization of an object by touching or stroking it with a magnet |
