Electricity & Magnets

What happens when two bar magnets repel each other?

• The poles of the magnets pull toward each other.
• The poles of the magnets push away from each other.
• The centers of the magnets pull toward each other.
• The centers o the magnets push away from each other.

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In which of these circuits will the light bulb turn on?

• A
• B
• C
• D

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Magnets have opposite poles, sometimes called north and south.  When you put the north poles of two magnets together, the magnets will ________.

• Repel
• Explode
• Attract
• Spin

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The path through which electricity flows is called a _________.

• Trail
• Circuit
• Receiver
• Power Source

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A switch can change an open circuit into a(n) _______________.

• Closed Circuit
• Electrical Circuit
• Parallel Circuit
• Series Circuit

An insulator is a material that _______.

• produces heat and light.
• does not easily allow the flow of electricity.
• is expensive.
• connects batteries to wires in a circuit.

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Which of these materials would be considered an excellent energy conductor?

• Copper wire
• Plastic straw
• Wooden clothes pin
• Pillow

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What would cause a balloon to stick to someone's head?

• force of gravity
• force of friction
• opposite electric charges
• opposite magnetic poles

Material that allows electric current or heat to flow through easily.

• electromagnetic field
• conductor
• open circuit
• electric current

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If the lights are on, the circuit is

• closed
• open