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PS-Magnetism(Ch. 19)
Magnetism (Ch. 19) - Physical Science - Prentice Hall Science Explorer
| Question | Answer |
|---|---|
| magnet | any material that attracts iron and metals 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 substance by chemical or physical means; one of about 100 basic materials that make up all matter |
| nucleus | the central core of an atom |
| proton | a positively charged particle that is part of an atom's nucleus |
| neutron | a small particle in the nucleus of an 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 a material that easily loses its magnetism |
| permanent magnet | a magnet made of a 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 Allen belts | two doughnut-shaped regions 1,000-25,000 Km 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 the Earth's magnetic poles interact |
| aurora | a glowing region produced by the interaction of charged particles and atoms in the atmosphere |
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