Conservation of Energy and Energy Transformation

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-PS3-2

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-PS2-1

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NGSS.MS-PS3-1

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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

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Which of the following shows an energy transformation from chemical energy to electrical to light energy?

• A bolt of lightning lights 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.

Energy transformations occur when...

• energy is created through conduction

• energy changes from one form to another

• two forces slide together that are touching

• a chemical reaction takes place

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NGSS.MS-PS3-5

At which point on the roller coaster is the gravitational potential energy at its maximum and kinetic energy at its minimum?

• A

• B

• C

• D

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NGSS.MS-PS2-4

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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-PS3-1

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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