Energy Transformation and Conservation

What energy transformations take place when a battery-operated radio is in use?

• Electrical to chemical to light

• Sound to chemical to mechanical

• Chemical to electrical to sound

• Light to electrical to thermal

Which of the following devices transforms electrical energy into mechanical energy?

• An e-reader

• a fan

• a manual pencil sharpener

• ipod

Tags

NGSS.MS-PS3-1

The picture shows a microwave oven. As a microwave oven is operated, electrical energy is transformed into all of the following types of energy EXCEPT —

• solar

• light

• thermal

• mechanical

Tags

NGSS.MS-PS3-5

A pendulum has the most kinetic energy when?

• at the top of its swing

• at the bottom of its swing

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NGSS.MS-PS3-1

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Whenever a moving object experiences friction, some of its kinetic energy is transformed into __________ energy.

• thermal

• electrical

• nuclear

• mechanical

Tags

NGSS.MS-PS3-5

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

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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-PS3-2

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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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.HS-PS3-1

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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

Tags

NGSS.MS-LS1-6

NGSS.MS-LS1-7