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science chapter 19

magnetism

TermDefinition
magnet Any material that attracts iron and materials that contain iron.
magnetic pole The ends of a magnetic object, where the magnetic force is the 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
element A pure substance that cannot be broken down into other substances by chemical or physical means
nucleus the central core of an atom
proton A positively charged particle found in an atom's nucleus.
neutron A small particle in the nucleus of an atom with no 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 attached 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 material that keeps its magnetism
compass a device with a magnetized needle that can spin freely
magnetic declination The angle between geographic north and north to which a compass needle points.
Van Allen belts Two donut 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.
Created by: 088103