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19 Magnetism(Ch. 19)

Magnetism (Ch. 19) - Prentice Hall Science Explorer

QuestionAnswer
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