| A | B |
|---|
| Magnet | Any material that attracts iron and materials that contain iron. |
| Magnetic pole | The ends of a magnetic object, where the magnetic force is strongest. |
| Magnetic force | A force produced when magnetic poles interact. |
| Magnetic field | The region around a magnet where the magnetic force is exerted. |
| Magnetic field lines | Invisible lines that map out the magnetic field around a magnet. |
| Atom | The basic particle from which all elements are made. |
| Element | A pure substance that cannot be broken down into other substances by chemical or physical means. |
| Nucleus | The central core of the atom, containing protons and usually neutrons. |
| Proton | A positively charged particle that is part of an atom's nucleus. |
| Neutron | A small particle in the nucleus of the atom, with no electrical charge. |
| Electron, | A negatively charged particle that is found outside the nucleus of an atom. |
| Magnetic domain | A region in which the magnetic fields of all atoms are lined up in the same direction. |
| Ferromagnetic material | A material that is strongly attracted to a magnet, and which can be made into a magnet. |
| Temporary magnet | A magnet made from material that easily loses its magnetism. |
| Permanent magnet | A magnet made from material that keeps its magnetism. |
| Compass | A device with a magnetized needle that can spin freely. |
| Magnetic declination | The angle between geographic north and the north to which a compass needle points. |
| Van Alien belts | Two doughnut -shaped regions 1,000-25,000 kilometers above Earth that contain electrons and protons traveling at high speed. |
| Solar wind | Streams of electrically charged particles flowing at high speeds from the sun. |
| Magnetosphere | The region of Earth's magnetic field shaped by the solar wind. |
| Aurora | A glowing region produced by the interaction of charged particles and atoms in the atmosphere. |
