Science Chapter 3 Electricity

Which of these materials is a good conductor?

• chalk

• rubber

• glass

• gold

What is a use of an insulator?

• Insulators make electric charges safer to handle and use.

• Insulators allow electric current to flow through it.

• Insulators slow down the flow of electrical current to make heat and light.

• Insulators store energy to be used later.

When can an electric current NOT flow in a series circuit?

• The circuit contains one insulator.

• The circuit has only one loop in it will not allow it to flow.

• The circuit contains one resistor.

• A break in the circuit will not allow it to flow.

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 broken loop.

• Electric current will still flow through the unbroken loops.

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

How does a washing machine transform energy?

• Motion energy is changed into electric energy.

• Electricity is changed into motion energy.

• Electricity is changed into light.

• Heat is changed into motion.

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Which is caused by the energy of motion?

• resistor

• filament

• conductor

• friction

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Which is an example of a resistor?

• filament

• battery

• parallel circuit

• power cord

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

• microwave

• gas stove

• car engine

• dryer

What will happen to the circuit if a plastic straw is placed between the battery and one of the wires connected to it.

What is the use of the light bulb in a flashlight?

• switch

• energy source

• resistor

• insulator

• conductor