Transformations of Energy

What is the type of kinetic energy that occurs when playing loud music that creates vibrations and moves through multiple mediums (air, water, steel)?

• Mechanical

• Sound

• Electromagnetic

• Chemical

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NGSS.MS-PS4-1

NGSS.MS-PS4-2

The rock in the picture is pushed over the edge and it begins to fall. Which type of energy conversion is taking place?

• mechanical to heat

• sound to mechanical

• potential to kinetic

• kinetic to potential

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NGSS.MS-PS3-1

NGSS.MS-PS3-2

NGSS.MS-PS3-5

As a roller coaster goes downhill

• kinetic energy is converted into potential energy.

• potential energy is converted into kinetic energy.

• electrical energy is converted into potential energy.

• potential energy is converted into electrical energy.

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NGSS.MS-PS3-4

NGSS.MS-PS3-5

A pole vaulter runs forward, plants his pole, rises in the air and lands. Which transfer of energy best represent this motion?

• gravitational potential --> elastic --> kinetic

• kinetic --> gravitational potential --> elastic

• kinetic --> elastic --> gravitational potential

• elastic --> gravitational potential --> kinetic

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NGSS.MS-PS3-1

NGSS.MS-PS3-4

NGSS.MS-PS3-5

When water falls through a dam and turns a turbine connected to a generator, electricity is produced. This electricity is often used to light our homes and offices. Which of the following shows the energy transformations that occurs?

• electrical → radiant→ mechanical

• chemical → mechanical → electrical

• mechanical → chemical → radiant

• mechanical → electrical → radiant

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NGSS.MS-PS3-1

NGSS.MS-PS3-5

Which of the following shows the correct order of the energy transformations that occur when green plants produce their food from the Sun’s energy?

• chemical → thermal

• light → chemical

• thermal → light

• chemical → electrical

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

As a pendulum swings from its highest to lowest position, what happens to its kinetic and potential energy?

• The PE and KE both increase

• The PE decreases while the KE increases

• The PE and KE both decrease

• The PE and KE do not change

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NGSS.MS-PS3-4

NGSS.MS-PS3-5

According to the Law of Conservation of energy, how do the amount of energy before an energy transformation compare to the amount of energy after the transformation?

• The total amount of energy before and after the transformation is the same

• The total amount of energy before a transformation is less than after the transformation

• The total amount of energy before a transformation is more than after the transformation

• The total amount of energy before and after the transformation increases and then decreases

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NGSS.MS-PS3-4

NGSS.MS-PS3-5

A ball is projected into the air. Where is potential energy the greatest?

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NGSS.MS-PS3-2

Some students observing a classroom device being used, noticed the below energy transformations.

Electrical → Mechanical → Sound

Which device were the students most likely observing?

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