5_Energy Conversions

• Thermal energy stored in the rubber band is transformed into chemical energy used by the propeller.
• Kinetic energy stored in the rubber band is transformed into thermal energy used by the propeller.
• Chemical energy stored in the rubber band is transformed into potential energy used by the propeller.
• Potential energy stored in the rubber band is transformed into mechanical energy used by the propeller.

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-2

• wind energy → mechanical energy → solar energy
• wind energy → thermal energy → mechanical energy
• wind energy → solar energy → electrical energy
• wind energy → mechanical energy → electrical energy

Tags

NGSS.MS-ETS1-1

3. A bicycle rider ate breakfast before her ride.  Which of the following energy transformations occurred during the bike ride?

• Mechanical energy to chemical energy
• Chemical energy to mechanical energy
• Electrical energy to chemical energy
• Chemical energy to light energy

Tags

NGSS.MS-PS3-5

A hand-held video game is powered by batteries.  After playing the game for several minutes, a student notices that the game feels warm.  Which of the following is most likely the explanation for this observation?

• The game creates energy when it is turned on.
• Some of the energy from the batteries is changed to heat.
• Some of the energy from the batteries is changed to friction   
• The game receives heat energy from the person playing it.

5. A battery-powered watch with a minute hand and an hour hand tells time because of the transformation of one energy form to another.  Which of the sequences below illustrates this transformation?

• chemical energy → electrical energy → mechanical energy
• chemical energy → mechanical energy → electrical energy
• mechanical energy → chemical energy → electrical energy
• electrical energy → chemical energy → mechanical energy

Tags

NGSS.HS-PS3-3

6. Which statement best describes the energy transformations that occur when a candle burns?

• Heat energy from the wax is converted into chemical and light energy.
• Heat energy from the air is converted into mechanical and light energy.
• Chemical energy from the wax is converted into light and heat energy.
• Chemical energy from the air is converted into mechanical and light energy.

Tags

NGSS.MS-PS1-2

7. A person cuts down a living oak tree. The person burns the wood from the oak tree to boil water.  Which sequence correctly orders the energy transformations that occurred from the living tree to the boiling water?

• solar energy → chemical energy → thermal energy
• thermal energy → chemical energy → light energy
• chemical energy → mechanical energy → electrical energy
• electrical energy → mechanical energy → chemical energy

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

• mechanical energy → electrical energy → light energy
• mechanical energy → chemical energy → light energy
• chemical energy → mechanical energy → light energy
• chemical energy → electrical energy → light energy

9. A factory uses a gasoline engine to turn a pulley.  Which energy transformations took place?

• Thermal → chemical → light
• Chemical → thermal → mechanical
• Mechanical → light → chemical     
• Chemical → mechanical → thermal

Tags

NGSS.HS-PS3-3

The diagram to the right shows a battery-powered circuit.  Which sequence correctly orders the energy transformations that are occurring within this circuit?

• light energy → chemical energy → electrical energy
• chemical energy → mechanical energy → light energy
• mechanical energy → electrical energy → chemical energy
• chemical energy → electrical energy → light energy