Physical Science Coach Lessons 7, 8, 9, & 10

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

• Both items are dry.

• The glove and the sweater have opposite charges.

• 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 the switch for a light?

• 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.

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

• load

• wire

• switch

• battery

Which of these materials is a conductor?

• rubber

• plastic

• glass

• copper

Which of these materials is an insulator?

• glass

• steel

• copper

• aluminum

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Which object could replace the switch and still allow the bulb to light up?

• rubber band

• strip of cloth

• steel paper clip

• wooden toothpick

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 will a magnet attract?

• copper

• rubber

• nickel

• plastic

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If you tried to move these magnets closter together, what would you feel?

• a push

• a pull

• no force

• an electric discharge

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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 of metal.

• Magents cannot attract objects through solid substances.

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