Magnets

What is a magnet?

• A magnet is a material or object that creates a magnetic field.
• A bar or horseshoe
• A magnet is a material or object that is attracted to all metals.
• A magnet is only found in nature.

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Where is Earth's magnetic field strongest?

• Along the outside lines
• Along the inside lines on either side
• Where the lines are close together at the poles
• In the space outside of the lines

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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Earth's magnetic field and a bar magnet attract particles to the same locations. Where are they?

• The middle
• All around the outside
• The north and south poles
• First to the middle, then to the ends

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Why does a compass needle point north?

• The compass is a bar magnet
• Because north is up
• Because it's magic
• It lines up with the Earth's magnetic field

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What is the device seen here?

• generator
• electric motor
• electromagnet
• magnet

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What can you use to make an electromagnet?

• Battery, nail and string 
• Battery, pencil and wire
• Wire, battery and iron ore (nail)
• Peanut butter, lampshade, hand sanitizer

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How do electromagnets differ from regular magnets? 

• A. They  can be turned off and on 
• B. Their polarity can be reversed
• C. Their strength can be changed
• D. All of the above

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Surrounding every magnet is a __________  __________.

• magnetic field
• electrical current
• another magnet
• an enemy

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In order for an electromagnet to be formed, an __________ current must pass through a coil of __________ wrapped around an ________ core.

• wire, iron, electric
• electric, wire, iron
• iron, electric, wire
• excited, hair, apple

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