Energy Transformations

Which of these represents the law of conservation of energy? 

• The energy that the sun puts out is more than the energy that we take in on earth
• The energy that the can opener takes in is less than the energy that can opener puts out 
• The amount of energy on earth never changes, it only changes form or goes from one object to another 
• Energy that we use can be destroyed 

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NGSS.MS-PS1-5

A roller coaster going down hill

• Potential energy is converted into kinetic energy
• Kinetic energy is converted into potential energy
• Chemical energy is converted into potential energy
• Potential energy is converted into electrical 

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NGSS.MS-PS3-2

NGSS.MS-PS3-5

When gasoline is burned in a car engine, _____________ energy is converted into ______________ energy. (

• Heat, chemical 
• Chemical, potential 
• Mechanical, mechanical
• Chemical, mechanical 

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NGSS.HS-PS3-3

Which example involves the transformation of chemical energy directly into light energy?

• A wind mill
• A glow stick 
• Photosynthesis 
• A hydroelectric dam 

An electromagnet is made by wrapping a wire around a nail and connecting the wire to both terminals of a battery. It can pick up 6 paper clips. What could you do to increase the number of paper clips the electromagnet picks up? 

• Make the wire longer
• Remove the nail from the center of the wire
• Increase the number of loops/coils of wire around the nail 
• Spread the loops of wire apart on the nail so they do not touch 

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NGSS.MS-PS2-5

A generator converts mechanical energy into ____________________ energy. 

• Chemical 
• Electrical 
• Light 
• Sound 

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NGSS.HS-PS3-3

A solar powered car converts ________________ energy into _______________ energy.

• Solar, chemical 
• Solar, mechanical 
• Mechanical, light
• Electrical, mechanical 

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NGSS.HS-PS3-3

What form of energy flows through a copper wire connecting two ends of a battery? 

• Heat energy 
• Electric energy 
• Chemical energy 
• Potential energy

With an electrical circuit that is connected to a light bulb, what would be the energy transformation? 

• Electrical to radiant
• Chemical to sound 
• Electrical to mechanical 
• Chemical to electrical 

When an electric circuit is connected to a fan, what would the energy transformation be? 

• Electrical to chemical
• Chemical to sound
• Electrical to mechanical 
• Chemical to thermal