(10) Energy Transformations-4.8A

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

• Emilio's car engine running

• Kayleen's flashlight being turned on

• Juan's windmill turning

• Miranda running

Answer explanation

The correct choice is Kayleen's flashlight being turned on because it involves the transformation of electrical energy into light energy.

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4.8A

DOK Level 1: Recall

When Gerardo and Tomas rub their hands together and they become warm, the type of energy transformation that occurs is (a)   .

• Electrical to thermal

• Mechanical to thermal
• Chemical to mechanical

• Light to thermal

Answer explanation

When Gerardo and Tomas rub their hands together, the mechanical energy from the motion of rubbing is transformed into thermal energy, making their hands warm.

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4.8A

DOK Level 1: Recall

Kayleen throws a ball into the air. Which of the following best describes the transfer of energy?

• The ball gains thermal energy as it rises

• The ball loses kinetic energy and gains potential energy as it rises

• The ball gains kinetic energy and loses potential energy as it rises

• The ball gains electrical energy as it rises

Answer explanation

The ball loses kinetic energy and gains potential energy as it rises

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4.8A

DOK Level 2: Skill/Concept

During a science experiment, Andrew and Sherlyn observed an example of energy transfer in sound. Which of the following did they observe?

• 
• 
• 
• 

Answer explanation

Andrew and Sherlyn observed energy transfer in sound when they heard a drum being struck and producing a sound.

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4.8A

DOK Level 1: Recall

Kayleen and Alejandro are playing with a battery-powered toy car. Describe the energy transformation that occurs when the toy car moves.

• Chemical energy in the battery is transformed into mechanical energy to move the car.

• Thermal energy in the battery is transformed into light energy to move the car.

• Electrical energy in the battery is transformed into sound energy to move the car.

• Light energy in the battery is transformed into chemical energy to move the car.

Answer explanation

Chemical energy in the battery is transformed into mechanical energy to move the car

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4.8A

DOK Level 2: Skill/Concept

Match the appropriate energies.

• kinectic energy

• 
• mechanical energy

• 
• potential energy

• 

Answer explanation

Potential energy is transformed into kinetic energy as the ball falls and hits the ground.

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4.8A

Match the following scenarios with the correct energy transfer descriptions.

• A stone is thrown into a pond, and the water changes color

• 
• A stone is thrown into a pond, and you hear a splash

• 
• A stone is thrown into a pond, and ripples move outward

• 

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4.8A

DOK Level 3: Strategic Thinking

Ingrid and Andrew plan an experiment to demonstrate the transfer of energy in waves using a slinky.

• Stretch the slinky and create a wave by moving one end up and down, observing how the wave travels through the slinky

• Stretch the slinky and create a wave by moving one end side to side, observing how the wave travels through the slinky

• Stretch the slinky and create a wave by moving one end in a circular motion, observing how the wave travels through the slinky

• Stretch the slinky and create a wave by moving one end back and forth, observing how the wave travels through the slinky

Answer explanation

Stretch the slinky and create a wave by moving one end up and down, observing how the wave travels through the slinky

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4.8A

DOK Level 4: Extended Thinking

Sherlyn and Alejandro are working on a science project to evaluate the effectiveness of different materials in transferring sound energy. Design an experiment to help them.

• Use a sound meter to measure the loudness of sound transmitted through different materials (wood, metal, plastic) and compare the results

• Use a light meter to measure the brightness of light transmitted through different materials (wood, metal, plastic) and compare the results

• Use a thermometer to measure the temperature change in different materials (wood, metal, plastic) and compare the results

• Use a stopwatch to measure the time it takes for sound to travel through different materials (wood, metal, plastic) and compare the results

Answer explanation

Use a sound meter to measure the loudness of sound transmitted through different materials (wood, metal, plastic) and compare the results

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4.8A

DOK Level 4: Extended Thinking

What is the energy transformation?

• Mechanical to Kinetic to Sound

• Mechanical to Electrical to Light

• Electrical to Thermal to Mechanical

• Kinetic to Sound to Potential

Answer explanation

The energy transformation goes from Mechanical to Kinetic to Sound, where mechanical energy is converted to kinetic energy and then to sound energy.

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4.8A