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Magnetism
Name_____________________
Section 1
Properties of Magnets
*A magnet is a material that ____attracts_____ iron and materials that
contain iron.
*Magnets were discovered in _____Magnesia_____, Greece.
*The mineral ____magnetite______ was used in our first magnets.
Magnetic Poles
*The ends of a magnet are called _____magnetic poles___.
There are two poles, the ____North________ and
_____South____ poles.
*Magnetic poles that are alike _____repel____________ each other
and poles that are different ________atract________ each other.
Example:
S
N
S
N
S
N
N
*The attraction or repulsion between magnetic poles is called
___magnetic force__________.
Magnetic Field
*An area of magnetic force around the magnet is the
______magnetic field ___.
*Magnetic field lines spread out from one ___pole_, curve
around the magnet and __returns____ to the other pole.
Example:
N
S
S
Section 2
The Atom
*Atoms are made up of ____protons____,
____neutrons_____, and electrons.
*A spinning ____electron___ produces a magnetic field
that makes the electron behave like a tiny
__magnets____.
Magnetic Domains
*A grouping of atoms that have their magnetic __fields____
aligned is known as a ___magnetic domain______.
*If a material is magnetize all or most of the
__magnetic domains___ are aligned in the same direction.
Making and Changing Magnets
*_____temporary___ magnets lose their magnetism
easily, but ____permanent____ magnets keep their magnetism for a
long time.
*Dropping, ___striking_____ , or
___heating____ up a magnet can destroy its magnetism.
Section 3
Magnetic Earth
*A __compass_____ is a tool that uses a magnetized
____needle_____ to find direction.
*The Earth’s magnetic field is cause by the flow of
___molten___ material in the Earth’s core.
*The Earth’s magnetic poles are __not__ in the same location as
the Earth’s _____geographic___ poles.
Magnetosphere
*The Earth’s magnetic field extends into space where it is shaped by
____solar winds______ from the sun to create the
___magnetosphere______.