McGraw Hill Chapter 4 Review

What is a conductor?

• A conductor is a type of electrical circuit.
• A conductor is a device that stores electrical energy.
• A conductor is a material that allows the flow of electric current or heat.

• A conductor is a material that insulates against heat.

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Which of the following are conductors?

• Wood, plastic, rubber
• Copper, aluminum, silver

What is an insulator?

• An insulator is a device that amplifies electrical signals.
• An insulator is a type of conductor that enhances heat flow.
• An insulator is a material that resists the flow of electric current or heat.
• An insulator is a material that allows free movement of electrons.

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Which of the following are insulators?

• Copper, aluminum, steel
• Rubber, glass, plastic

Phone and iPad chargers are safe to use because...

• They are wrapped in plastic insulation

• they are made from cheap materials that can break easily.
• they have exposed wires

When I make a bagel in the toaster, electrical energy transfers to...

• mechanical energy
• nuclear energy
• chemical energy
• thermal energy

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Which 2 items are insulators we use in the winter time?

• wool hat

• mittens

• bathing suit

• plastic bags

Why does a switch have the ability to turn on and off lights?

• A switch is used to change the color of the lights.
• A switch generates electricity to power the lights.
• A switch can only dim lights but not turn them off.
• A switch can turn on and off lights by controlling the flow of electricity in the circuit.

A bowling ball rolls down the lane, hits the pins, and knocks them down. Why do the pins fall down?

• The pins fall down because they are made of lightweight material.
• The pins fall down due to the friction between the ball and the lane.
• The pins fall down when they are hit by the air pressure from the ball.
• 
  The pins fall down due to the energy transfer from the bowling ball to the pins.

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How would an item like a rubber duck or pool float move in a lake

• A rubber duck or pool would bob up and down and turn in circles

• A pool float moves by paddling with its own power.
• A rubber duck sinks to the bottom and remains stationary.
• A rubber duck is pushed and pulled by the wind and by fish swimming nearby.

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