Sicence Unit 2 Test

During a science investigation, a student made the device shown below.  This device can best be used as a-

• heater

• magnet

• light source

• simple radio

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Which form of energy is produced when a guitar string vibrates? 

• chemical

• sound

• magnetic

• light

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Jake plugged a toaster into an electric outlet.  He put a piece of bread in the toaster and turned the toaster on.  While the toaster was on, it changed the electrical energy from the outlet into other forms of energy.  Which form of energy toasted the bread? 

• chemical

• thermal

• magnetic

• sound

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NGSS.MS-PS1-4

The sun provides the earth with which of the following forms of energy?

• thermal and light

• electrical and thermal

• light and mechanical

• electrical and sound

What kind of energy is produced from the candle?

• light

• sound and thermal

• thermal

• thermal and light

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 Which household appliance transforms electrical energy into heat energy?

• calculator

• gas clothes dryer

• hair dryer

• telephone

The picture below shows an electrical cord used on a toaster.

Why is the cord made of both plastic and copper?

• The plastic is a conductor and the copper is an insulator of electricity.

• The plastic and the copper are both conductors of electricity.

• The plastic is an insulator and the copper is a conductor of electricity.

What would happen to this system if part B was removed?

• Only the microphone would be affected.

• The speakers would function at a lower level.

• There would be no energy for the system to function.

• Only one of the speakers would work

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What force is MOST responsible for causing the car to stop?

• gravity

• magnetism

• pushing the car

• friction

The Bates are putting several large black panels on one side of the roof of their house. Water will circulate from their swimming pool through the panels and back into the pool after being warmed in the panels.  What source of energy is being used to heat the water?  Explain your answer.

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