Science Chapter 3

Which of these materials is a conductor?

• rubber

• chalk

• gold

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What is one use for an insulator?

• It stores electric energy for later us.

• It allows electric currents to flow through it.

• It makes electrically charged objects safe to handle.

Electric currents cannot flow in a series circuit if

• the circuit contains an insulator.

• there is a break in the circuit.

• the circuit has only one loop in it.

What will happen in a parallel circuit if one of its loops is broken?

• Electric current will not flow through any of the loops

• Electric current will still flow through the unbroken loops

• The energy source will stop providing energy to move electric charges

A washing machine is an example of transforming

• electricity into motion energy

• motion energy into electric energy

• electricity into light

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Which of the following is caused by the energy of motion?

• friction

• conductors

• filaments

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One example of a resistor is

• a power cord

• a battery

• a filament

Which of the following uses resistors to transform electricity into heat?

• a toaster

• a car engine

• a wind turbine

A material through which an electric charge can move easily is

• a resistor

• an insulator

• a conductor

Which material would be the best insulator for a metal wire?

• glass

• silver

• copper

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