Electricity and Magnetism

Which is an insulator?

• Glass

• Steel

• Copper

• Aluminum

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What materials will attract a magnet?

• Copper

• Rubber

• Nickel

• Plastic

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How many poles do magnets have?

• 1

• 2

• 3

• None

Which statement about magnets is true?

• All magnets have the same shape and size

• All magnets have a north and south pole

• Magnets can attract all objects made of metal

• All magnets have east and west poles

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A scientist wants to design a new hair dryer. Which would be the BEST material to use for the handle of the hair dryer?

• Iron

• Silver

• Rubber

• Aluminum

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Which of these materials is a conductor?

• Rubber

• Plastic

• Glass

• Copper

In which part of a circuit is electrical energy changed into other forms of energy?

• Load

• Wire

• Switch

• Battery

Why might a glove stick to a sweater when you take it out of a clothes dryer?

• Both items are dry

• The glove and the sweater have opposite charges which causes static electricity

• An electric current flows between the glove and the sweater

• An electric current reduced the number of electrons in both items

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What happens when you flip on a light switch, so the lights are on?

• The electrical source turns on

• The circuit closes, and electric current flows to the light

• The circuit opens, and electric current flows to the light

• Electric current is transferred from a different load to the light

Which mixture could you separate with a magnet?

• Iron fillings and water

• Cobalt strips and iron scraps

• Iron fillings and nickel scraps

• Aluminum scraps and woodchips