Energy Transformations and Waves

Read each question carefully. Choose the best answer to each question. When a toaster is plugged into a wall socket and operating correctly, which of the following energy transformations occurs?

• Chemical to thermal

• Electrical to mechanical

• Electrical to thermal

• Chemical to electrical

Tags

NGSS.MS-PS3-3

Read each question carefully. Choose the best answer to each question. Which of the following shows an energy transformation from chemical energy to electrical energy to light energy?

• A bolt of lightning illuminates the night sky

• A candle glows brightly in the dark

• A fire in a fireplace lights up a room

• A battery causes a flashlight to shine

Read each question carefully. Choose the best answer to each question. How is energy transferred in transverse and longitudinal waves?

• In transverse waves, energy is transferred through the circular movement of the medium. In longitudinal waves, energy is transferred through the up and down movement of the medium.

• In transverse waves, energy is transferred through the perpendicular movement of the medium to the direction of the wave. In longitudinal waves, energy is transferred through parallel movement of medium particles along the direction of the wave.

• In transverse waves, energy is transferred along the direction of the wave through compressions. In longitudinal waves energy is transferred perpendicular to the direction of the wave.

• In transverse waves, energy is transferred through the parallel movement of the medium to the direction of the wave. In longitudinal waves, energy is transferred through the circular movement of the medium around the direction of the wave.

Read each question carefully. Choose the best answer to each question. Which energy transformations occur when a student eats food and then uses that energy to run a race?

• Mechanical → chemical → thermal

• Chemical → mechanical → thermal

• Chemical → sound → electrical

• Mechanical → thermal → sound

Tags

NGSS.MS-PS3-5

Choose the correct answer for each blank to complete the sentences. Each answer is used only ONE time. Match each statement to the correct term: A sound wave is an example of a —. A human wave at a stadium is an example of a —. Air is an example of a —.

• Air is an example of a —

• medium

• A sound wave is an example of a —

• transverse wave

• A human wave at a stadium is an example of a —

• longitudinal wave

Determine which type of potential energy is at work in each example. Select ONE correct answer. Example: A bow being held back in its farthest position.

• Gravitational potential energy

• Elastic potential energy

• Chemical potential energy

Determine which type of potential energy is at work in each example. Select ONE correct answer. Example: A rock being held over the edge of a cliff.

• Gravitational potential energy

• Elastic potential energy

• Chemical potential energy

Tags

NGSS.MS-PS2-4

Determine which type of potential energy is at work in each example. Select ONE correct answer. Example: Grass that has just been eaten by a deer.

• Gravitational potential energy

• Elastic potential energy

• Chemical potential energy

Which of the following devices transforms electrical energy into mechanical energy? Select TWO correct answer choices.

• 
• 
• 
• 
• 

Tags

NGSS.MS-PS3-5

A student stretches a rubber band and then releases it. How do the potential energy and kinetic energy change during this process?

• The potential energy decreases as the rubber band is stretched, and the kinetic energy increases when the rubber band is released.

• The potential energy remains constant when the rubber band is stretched, and the kinetic energy decreases when the rubber band is released.

• The potential energy increases as the rubber band is stretched, and the kinetic energy increases when the rubber band is released.

• The potential energy increases when the rubber band is stretched, and the kinetic energy remains constant when the rubber band is released.

Tags

NGSS.MS-PS3-2