Magnet Review Sheet

Magnet Review Sheet

A.       Magnets can occur in nature in rocks such as magnetite.

B.      The Earth is like a big magnet because it has a magnetic field at its North and South geographic poles.

C.      That is why a compass works on the Earth.  A compass tells us direction because it is attracted to Earth’s geographic poles.

D.     Earth’s magnetic force is at its strongest at these magnetic poles.

E.      All magnets have an invisible magnetic field where the magnet can act on objects around it.

F.       Objects that are attracted to the magnetic field of a magnet are called magnetic.

1.       These are objects that contain iron, nickel, or cobalt.

2.      The word ferrous means containing iron.

G.     Objects that do not react to the magnetic field of a magnet are called nonmagnetic.

1.       These are objects made of plastic, wood, or paper.

H.     The magnetic law of attraction states that on a magnet…

1.      Like poles will repel. Repel means to push away.

2.      Unlike poles will attract. Attract means to pull together.

I.        Temporary magnets are magnets that lose their magnetic pole after a short time.

J.        Magnetite is one type of a temporary magnet.

K.      You can make a nail or other metal objects into a temporary magnet by rubbing them with a magnet going in one direction.

L.       This rubbing aligns all the positive and negative charges in one direction.

M.    An electromagnet is made when wire is wrapped around an iron rod and electricity is added.

N.     A generator uses magnets and loops of wire to turn mechanical energy into electrical energy.