5.2 Energy and Energy Transformations

An electric car is moving up a hill. What type of energy transformation is primarily taking place?

• Electrical energy to mechanical energy

• Mechanical energy to radiant

• Thermal energy to sound energy

• Radiant energy to electrical energy

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A light bulb is turned on, and it emits light and heat. Which statement best describes the energy transformation occurring in the light bulb?

• Electrical energy is transformed into radiant and thermal energy.

• Mechanical energy is transformed into sound energy.

• Thermal energy is transformed into electrical energy.

• Radiant energy is transformed into mechanical energy.

Consider a wind turbine generating electricity used in heating up a house. Which sequence of energy transformations is most accurate?

• Mechanical energy to electrical energy to thermal energy

• Thermal energy to mechanical energy to electrical energy

• Radiant energy to thermal energy to mechanical energy

• Mechanical energy to thermal energy to electrical energy

A electric powers a toy car. What is the primary energy transformation that occurs in this process?

• Electrical energy to mechanical energy

• Thermal energy to electrical energy

• Radiant energy to chemical energy

• Mechanical energy to sound energy

When you speak into a microphone, your voice is amplified through speakers. What energy transformation occurs in this process?

• electrical energy to sound energy

• Electrical energy to thermal energy to sound energy

• Mechanical energy to thermal energy to electrical energy

• Radiant energy to sound energy to electrical energy

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A solar panel converts sunlight into electricity. Which type of energy transformation is this?

• Radiant energy to electrical energy

• Thermal energy to mechanical energy

• Chemical energy to thermal energy

• Mechanical energy to radiant energy

A hydroelectric dam generates electricity. What is the sequence of energy transformations involved?

• Mechanical energy to electrical energy

• Thermal energy to mechanical energy

• Chemical energy to thermal energy

• Radiant energy to electrical energy

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NGSS.HS-PS3-3

When a toaster is used to make toast, what energy transformation occurs?

• Electrical energy to thermal energy

• Mechanical energy to sound energy

• Radiant energy to chemical energy

• Thermal energy to electrical energy

What kind of energy is coming out of this reaction

• Thermal
• Radiant

• Mechanical

• Electrical

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The picture shows what type of transformation

• Electrical to mechanical

• light to electric

• electrical to light

• light to light

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