Lesson 4: How is Energy Transferred by Electric Currents?

A device that uses an electric current to produce motion.

• switch

• solar cell

• motor

• power line

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The interactions between moving electric charges.

• electricity

• electric currents

• power surges

• sparks

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A flow of electric charge. This carries energy to machines.

• motor

• electricity

• solar cell

• electric current

A tool made of thin layers of different materials that transfers energy carried by light to an electric current.

• motor

• solar cell

• turbine

• insulation

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What provides energy that a solar cell uses to produce an electric current?

• coal

• electricity

• water

• sun

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A motor uses what two things, besides an electric current, to spin?

• A magnet and a coil of metal.

• A magnet and a battery.

• A magnet and an outlet.

• A coil of metal and a battery.

Materials such as copper or aluminum that allow heat and electricity to pass through them.

• wires

• insulators

• power lines

• conductors

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Materials that do not allow heat and electricity to pass through them. Some examples are wood, paper, and rubber.

• wires

• insulators

• power lines

• conductors

Electric currents can be used to make:

• motion

• sound

• light

• heat

• all of these

Energy can be transferred from place to place by:

• wires

• batteries

• an electric current

• through power lines

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