Conductors Insulators and Simple Circuits

A material that keeps electric charges from flowing through easily is called

• Flash light

• toaster

• an insulator

• series circuit

Charged particles that flow continuously through material is called

• Insulator

• Electric Current

• Flashlight

• closed circuit

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Most circuits include a device that opens and closes the circuit. This device allows you to turn a light bulb on and off. This device is a

• computer

• wire

• switch

• flashlight

Electrical current will pass easily through metals such as copper, aluminum and gold. These metals are good

• things

• insulators

• charged particles

• conductors

Every working circuit has at least three parts: 1) a power source, 2) a conductor, usually wire and 3)

• insulator

• an object that uses electric current like a light bulb

• series circuit

• rock

If too much electric current passes through a circuit, the wires can

• make batteries

• cool down

• conductor

• overheat

When too much electric current flows through an object, the object can heat up. What might this cause?

• your computer will turn on

• a fire

• the circuit to open

• carry information from the brain

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All of the follow are true EXCEPT

• Electric current can pass through your body.

• Electricity can cause burns and injuries.

• power cords are made of plastic covered in metal.

• The heat from electrical current can damage the insulation on wires.

What object would best complete this circuit?

• battery

• peice of yarn

• insulator

• conductor

The plastic covering is there to:

• Provide a conductor for electrical energy to flow.

• Provide an insulator so that electrical energy will not pass outside of the wires.

• Provide a conductor so that electrical energy can NOT flow.

• Provide an insulator so that electrical energy can flow.