Energy Transformations and Conservation of Energy

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-PS3-5

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

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NGSS.MS-PS3-2

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.

Tags

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-PS3-2

NGSS.MS-PS3-5

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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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

Tags

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-LS1-7

NGSS.MS-LS2-3

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

Tags

NGSS.MS-PS3-5

The picture showing the energy conversion

Chemical → radiant and thermal is:

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NGSS.MS-PS1-6