Magnetism

What will happen when these magnets are brought close together?

• They will attract each other.
• They will repel each other.
• Both magnets will turn to the left
• Both magnets will turn to the right

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

• It is hundreds of miles long
• It has north and south poles
• It is made in Earth's core
• It is shaped like a horseshoe

As the distance between two magnets increases (they get farther apart), the force between them:

• Increases
• Decreases
• Stays the Same

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The strongest part of a magnet is...

• the bars.
• the force field.
• the poles. 
• the middle.

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A magnet will pick up a nail, but not a penny because the nail

• has rust on it.
• is lighter than the penny.
• has a sharp point.
• contains iron.

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Magnets have a north and a south ___________

• shape
• color
• pole
• region

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Magnets can pull on things without touching them.

• True

• False

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A type of magnet that has temporary magnetic effect when electric current flows through it.

This refer to

• Electric

• Electronic

• Electrostatic

• Electromagnet

This is a picture of a simple electromagnet. How can the electromagnet be made stronger?

• Add more coils of wire to the nail.
• Use a smaller battery.
• Reverse the poles of the magnet.
• Remove all the coils and the nail.

The lines on this image are called...

• magnetic field lines
• iron fillings
• graphite lines
• none of these

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