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15 terms

Physical Science Chapter 11

vocabulary
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magnet
any object that possesses or can generate a magnetic field
magnetic pole
one of two areas of concentrated magnetic field lines on a magnet's surface
magnetic dipole
any object or particle with magnetic properties having two magnetic poles
law of magnetism
law stating that opposite magnetic poles attract and like magnetic poles repel
magnetic field
the region of influence surrounding a magnet, where it exerts a magnetic force
ferromagnetism
phenomenon observed in materials that are highly permeable to magnetic lines of force because their domains align with the field
ferromagnetic material
a material that naturally exhibits ferromagnetism
paramagnetism
exhibited by materials that are only slightly attracted to magnets
domain (magnetic)
a microscopic region of a metal where most of the magnetic dipoles are oriented in a single direction, giving the region a distinct magnetic orientation
permanent magnet
a ferromagnetic material containing enough aligned magnetic domains to give it a permanent magnetic character
ferrimagnetism
a form of magnetism that results from the net difference of a mixture of opposed magnetic dipole particles in a natural magnet
diamagnetism
the natural tendency of all matter to weaken a magnetic field
Curie temperature
the temperature above which a permanent magnet loses its ferromagnetic properties
geographic North Pole
the point representing the intersection of the earth's axis with its surface in the northern hemisphere
magnetic North Pole
the slowly drifting point on the earth's surface in the northern hemisphere where the earth's magnetic field lines are most concentrated and nearly vertical