(9) Energy Transformations-4.8A

Which of the following is an example of electrical energy being transformed into light energy?

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4.8A

DOK Level 1: Recall

Match the following energy transformations with their descriptions:

• Battery powering a device

• Mechanical to electrical

• Using a toaster

• Thermal to chemical

• Photosynthesis in plants

• Chemical to electrical

• Wind turbine generating electricity

• Electrical to thermal

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4.8A

DOK Level 1: Recall

Identify the energy transformation in a hydroelectric power plant.

• Chemical to electrical

• Mechanical to electrical

• Thermal to mechanical

• Electrical to mechanical

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4.8A

DOK Level 1: Recall

When a ball is thrown into the air, what type of energy transformation occurs at the highest point of its motion?

• Kinetic to potential

• Potential to kinetic

• Thermal to mechanical

• Electrical to mechanical

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4.8A

DOK Level 2: Skill/Concept

Explain the energy transformation that occurs when a person rides a bicycle.

• Chemical energy in muscles to mechanical energy in motion

• Electrical energy in muscles to mechanical energy in motion

• Thermal energy in muscles to mechanical energy in motion

• Light energy in muscles to mechanical energy in motion

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4.8A

DOK Level 2: Skill/Concept

Describe the energy transformations that occur in a wind turbine.

• Wind energy to mechanical energy to electrical energy

• Mechanical energy to wind energy to electrical energy

• Electrical energy to wind energy to mechanical energy

• Thermal energy to mechanical energy to electrical energy

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4.8A

DOK Level 3: Strategic Thinking

Investigate and explain how energy is transferred in a roller coaster ride from the top of the first hill to the bottom: (a)  

• Potential energy to kinetic energy
• Kinetic energy to potential energy
• Thermal energy to potential energy
• Electrical energy to kinetic energy

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4.8A

DOK Level 3: Strategic Thinking

Design an experiment to demonstrate the transfer of energy in a simple pendulum. Describe the steps and the expected observations.

• Set up a pendulum, pull it to one side, and release it. Observe the transformation between potential and kinetic energy as it swings.

• Set up a pendulum, pull it to one side, and release it. Observe the transformation between thermal and electrical energy as it swings.

• Set up a pendulum, pull it to one side, and release it. Observe the transformation between chemical and light energy as it swings.

• Set up a pendulum, pull it to one side, and release it. Observe the transformation between electrical and mechanical energy as it swings.

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4.8A

DOK Level 4: Extended Thinking

Match the following

• Electrical Outlet

• Mechanical Energy

• Battery

• Chemical Energy

• Movement

• Electrical Energy

• Heat

• Thermal Energy

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4.8A

112.18.b.9.C

A lamp that plugs into a wall socket draws energy which flows through a thin wire in the bulb causing it to glow. What energy transformations are taking place?

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

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4.8A