Magnetism
Word Maze
The
grid below contains letters that make up the missing words from the paragraphs
below. Start at the blue square and trace out the twisting path the answers
take. Letter-paths go horizontally and vertically only, but may change
direction several times within a word!
The ends of a magnet are called the -----. The North Pole points -----. There are ----- magnetic elements: ----, ------ and ------. Only these and their alloys (mixtures of metals containing them) will be attracted to a magnet... all other metals will not. The ------
Theory tries to explain why metals get magnetised. The magnetic elements
have little ---------
magnets inside them. These are --------
orientated in an unmagnetized piece
of metal but point in a ----------
direction in a magnetised piece. ---- magnetic materials (e.g. iron) have domains that ------ move into line when the metal is placed in a -------- ----- but as soon as the field is removed the ------- take on a ------ ------- again. It returns to being unmagnetized straight away. ---- magnetic materials (e.g. -----) have domains that do --- easily move into line when the metal is placed in a magnetic field, a strong field is needed for some time, but then, when the field is removed the domains retain the magnetic pattern. The metal stays magnetic for a ---- ----. A ------- is a freely suspended magnet, shaped like an -----, positioned in a ----. The point of the arrow is the ----- ---- and will point to the magnetic north unless a strong magnetic field is overpowering the earth's field. ---- poles REPEL and OPPOSITE poles ATTRACT
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