Energy, Waves & Transformations

In which wave is the motion of the particles parallel to the motion of the wave?

• Crest

• Longitudinal

• Trough

• Surface wave

What change in a wave will show a change in energy?

• Decrease in speed

• Increase in frequency

• Decrease in wavelength

• Decrease in amplitude

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NGSS.MS-PS4-1

The pictures show a toaster, a crane, a buzzer, and a flashlight.

Which picture best shows electrical energy being converted into thermal energy?

• Toaster

• Crane

• Siren

• Flashlight

Tags

NGSS.MS-PS1-4

When plants engage in photosynthesis, what type of energy are they converting to chemical energy?​ (a)  

• Thermal energy
• Potential energy
• Light energy
• Kinetic energy

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NGSS.MS-LS1-6

Marshall and his friends like to skateboard in an empty swimming pool. The picture below shows a cross-section of the swimming pool. Several points along Marshall's path have been labeled. At which point is Marshall's potential energy the greatest?

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NGSS.MS-PS3-2

Marshall and his friends like to skateboard in an empty swimming pool. The picture below shows a cross-section of the swimming pool. Several points along Marshall's path have been labeled. At which point is Marshall's potential energy the weakest?

Tags

NGSS.MS-PS3-2

The picture below shows a train as it approaches a hill. This train can only make it over the hill if it approaches at its top speed because it will lose speed as it climbs. What changes are taking place in the train's potential and kinetic energy as it climbs the hill?

• The train's potential energy is increasing and its kinetic energy is increasing.

• The train's potential energy is decreasing and its kinetic energy is increasing.

• The train's potential energy is increasing and its kinetic energy is decreasing.

• The train's potential energy is decreasing and its kinetic energy is decreasing.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-5

The picture below shows a pair of maracas at rest. The maracas possess —

• kinetic energy and no potential energy.

• potential energy and no kinetic energy.

• both kinetic and potential energy.

• neither kinetic nor potential energy.

Tags

NGSS.MS-PS3-2

Kinetic energy is —

• dependent on an object's position

• weakest at high temperatures

• the energy of motion

• always increasing

Tags

NGSS.MS-PS3-1

What kind of energy transformation is taking place when a hair dryer is used?

• Magnetic energy is being transformed into wind energy.

• Sound energy is being transformed into electrical energy.

• Electrical energy is being transformed into thermal energy.

• Mechanical energy is being transformed into thermal energy.