Energy Transformation and Conservation

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

Tags

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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Tags

NGSS.MS-PS2-4

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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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.

The picture showing the energy conversion

Chemical → radiant and thermal is:

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Tags

NGSS.MS-PS1-4

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

• Electrical to chemical to radiant

• Sound to chemical to mechanical

• Chemical to electrical to sound

• Radiant to electrical to thermal

The skater starts 8 meters above the ground. At which height on the ramp does the skater's total energy change ?

• 8 meters

• 4 meters

• 2 meters

• The skater's total energy doesn't change.

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Is energy always conserved?

• Always

• Often

• Never

• Sometimes

Tags

NGSS.MS-PS3-5

According to the Law of Conservation of energy, the amount of energy before and after a reaction must be the same. Which statement below is true?

• The total amount of energy is conserved

• The total amount of energy is less after a reaction

• The total amount of energy is more after a reaction

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Energy cannot be destroyed.

• True 

• False

Tags

NGSS.MS-PS3-5