Energy

What happens to energy when it is transformed?

• A. It is destroyed

• B. It is created

• C. It is conserved

• D. It is converted into matter

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-5

What is the energy transformation that occurs when a person rides a bicycle?

• A. Chemical to mechanical

• B. Mechanical to electrical

• C. Electrical to thermal

• D. Thermal to chemical

Which of the following is an example of thermal energy?

• A. A running faucet

• B. A spinning wind turbine

• C. A charged battery

• D. A burning candle

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

What is the energy transformation that occurs when a light bulb is turned on?

• A. Electrical to thermal

• B. Thermal to electrical

• C. Mechanical to electrical

• D. Chemical to electrical

What is the energy transformation that occurs when a battery-powered flashlight is turned on?

• A. Electrical to thermal

• B. Thermal to electrical

• C. Mechanical to electrical

• D. Chemical to electrical

Which of the following describes the energy transformation occurring in a hair dryer?

• Electrical → Chemical → Light

• Electrical → Thermal → Sound

• Mechanical → Sound → Thermal

• Mechanical → Electrical → Sound

Tags

NGSS.MS-PS3-3

The image below shows a hot air balloon rising. Propane gas tanks are seen at the bottom of the balloon.

What energy transformations occur when propane gas is used to lift the balloon?

• thermal energy → chemical energy → light energy

• mechanical energy → light energy → chemical energy

• chemical energy → mechanical energy → thermal energy

• chemical  energy → thermal energy → mechanical energy

Tags

NGSS.MS-PS3-3

 The image below shows a tea kettle on a gas stove. 

Which statement describes the energy transformation that occurs when the tea kettle begins whistle as the water is heated on a stove that uses natural gas? 

• The thermal energy in the natural gas is transformed into sound energy when the water becomes hot. Then the sound energy changes into light energy when the kettle becomes warm. 

  
  

• The chemical energy in the natural gas is transformed into thermal energy which heats the water. Then the thermal energy changes into sound energy when the water forms steam and the steam leaves the kettle.

• The light energy in the natural gas is transformed into chemical energy in the water. Then the chemical energy changes into kinetic energy when steam leaves the kettle and into sound energy when the water boils. 

  
  

• The electrical energy in the natural gas is transformed into thermal energy which causes the water to form steam. Then the thermal energy changes into sound energy and light energy when the steam leaves the kettle. 

  
  

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

 Students conducted an investigation using basketballs. They dropped a basketball from a height of 100 centimeters (cm) and it bounced back to a height of 60 centimeters (cm). According to the Law of Conservation of Energy, which of the following statements best describes why the basketball did not bounce back to the original height? 

• energy was created as the basketball bounced

• energy was destroyed as the basketball bounced

• energy transferred to the ground when it made contact with the basketball

• energy transferred to the basketball when it made contact with the ground

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Which scenario best explains the Law of Conservation of Energy?

• All the energy used to throw a ball is destroyed when it lands.

• When a fish uses all of its energy, it creates more by swimming less.

• Light energy is collected by solar panels and transformed into electrical energy

• As a toy car starts to slow down until all of its energy is transferred into the ground. 

  
  

Tags

NGSS.MS-PS3-5