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Magnetism Lesson 1

Magnets and Magnetic Fields Ch 20.1

QuestionAnswer
magnet A(n) _____________ is an object that attracts the metal iron.
magnetic pole A(n) _______________ is a place on a magnet where the force it exerts is the strongest.
magnetic poles every magnet has 2 ____________
forces Any two magnets exert ___________ on each other
repel Similar magnetic poles ________ each other
attract Opposite magnetic poles _________ each other
stronger The magnetic force becomes ___________ as magnets move closer together.
weaker The magnetic force becomes ___________ as magnets move farther apart.
repel push away
attract pull together
field a space in which a given effect (such as magnetism) exists.
element a substance made up of only one kind of atom
magnetic force the force that a magnet applies to another magnet
magnetic material any material that a magnet attracts
ferromagnetic element elements, including iron, nickel, and cobalt, that have an especially strong attraction to magnets.
magnetic domain region in a magnetic material in which the magnetic fields of the atoms all point in the same direction.
temporary a magnet that quickly loses its magnetism after being removed from a magnetic field.
permanent a magnet that retains its magnetism even after being removed from a magnetic field
iron Earth has a(n) _____ core and a north and south pole
electric current As Earth's core moves, it creates an _________ that causes a magnetic field around Earth
magnetic field Earth is surrounded by a(n) _______________ due to iron and nickel in Earth's outer core.
compass A(n) ______________ needle always aligns with the magnetic field of a magnet
Sun Earth's magnetic field protects Earth from charged particles from the __________.
auroras Particles from the sun collide with atoms of gases, causing the atmosphere to glow, forming shimmering sheets of color called ____________.
poles Magnetic force of Earth is strongest at the _________.
poles Magnetic field lines have direction. The lines are closest together at the magnet's ___________
strongest Magnetic force is ___________ where the lines are closest together.
combine When two bar magnets are brought together, the two magnetic fields ___________
cancel If the magnetic fields of atoms point in different directions, the magnetic fields ______ each other and the object is not a magnet.
domains In a magnetic material, atoms form groups, or magnetic _________.
direction Within a domain, the magnetic fields of individual atoms point in the same _________________.
permanent What kind of magnet is a refrigerator magnet?
Created by: jameehopkins
 

 



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