Download Facts to Know This is the law of magnetic force: Unlike poles attract

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Transcript
Test Date_____________________________ Name_______________________________
Magnets
Facts to Know
Magnets exert a force that cannot be seen. Magnets attract or
repel things made out of iron, steel, nickel, or cobalt.
Magnetism is a force that is all around us, and we use it every day.
Some examples are: refrigerator doors, parts of computers,
doorbells, televisions, electric can openers, junkyards, and even
parts of toys.
Magnets can be made out of metals with iron or steel, and can also
be found naturally in stones called lodestone or magnetite.
Magnetic force is strongest at the two ends of a magnet, which we
call the magnetic poles. The magnetic field is strongest at the two
poles.
Our Earth is like a great big magnet, and the magnetic force is
strongest near the North Pole and the South Pole. The ends of
magnets are also called the north and south poles.
This is the law of magnetic force: Unlike poles attract, but like poles
repel. “Attract” means to pull together. “Repel” means to push
away.
We can use magnets to tell us what direction we’re going when we
use a compass, because the needle will always point north. Using a
compass together with a map to find your way is called
orienteering.
Vocabulary
magnet- a piece of metal that attracts other metal
magnetism- a force that cannot be seen that pushes and pulls
metal objects.
Lodestone – natural stone with magnetic properties
repel- to push away
attract- to pull
magnetic field- the push and pull surrounding a magnet
pole- where the magnetic pull is the strongest
Magnetic North and South- the magnetic pull of the Earth
compass- an instrument used for finding North, South, East, and
West