How Magnets Work

A complete electrical circuit made of wire coiled around an iron rod, a battery, and a switch are components of which of the following?

• A permanent magnet

• A natural magnet

• A magnetized paper clip

• An electromagnet

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How is earth's magnetic field similar to that of a bar magnet?

• It is hundreds of miles long.

• It has a north and a south pole.

• It is shaped like a horseshoe.

• It is made in earths core.

Which would be the best way to observe and compare the magnetic fields of different kinds and shapes of magnets?

• Ask a high school teacher.

• Read a book about magnets.

• Search the internet.

• Do an experiment with magnets and iron filings.

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Both Earth and a bar magnet have a _________ field with north and south poles.

• Geographic

• Atmospheric

• Magnetic

• Electric

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Colby decided to make a compass. He rubbed a needle 100 times with a magnet. Then he hung the needle on a thread. What will happen?

• The needle would turn until one end pointed down.

• The needle would turn until one end pointed north.

• The needle would spin around and never stop.

• The needle would point in no certain direction.

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Which statement is true?

• All Magnets have a North and South Pole

• All magnets can attract large objects

• Magnets can not pull through Solids.

• All Magnets have the Same shape and Size

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Looking at the drawing. If you tried to move these 2 magnets closer together, what would you feel?

• Push Away

• Pull Closer together

• No Force

• Nothing

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When Magnets push away from each other they...

• Repel

• Attract

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The AREA around a magnet where you feel a force.

• Gravity

• Magnetic Field

• Poles

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What subatomic particle causes magnetism in an atom? 

• protons

• neutrons

• electrons

• nucleus

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