Law of Conservation of Energy

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

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NGSS.HS-PS3-2

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NGSS.HS-PS3-1

Energy can be created.

• True
• False

Energy cannot be destroyed.

• True 
• False

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NGSS.HS-PS3-2

Food has _______ potential energy that our bodies transform into kinetic energy.

• Elastic
• Nuclear 
• Gravitational
• Chemical

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NGSS.HS-LS1-7

NGSS.HS-PS1-4

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-PS3-2

NGSS.MS-PS3-5

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

• 
• 
• 
• 

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NGSS.HS-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.

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NGSS.HS-PS3-3

NGSS.HS-PS3-2

When gasoline is burned in a car engine, ________ energy is converted into _________ energy.

• heat, chemical

• chemical, potential

• mechanical, chemical

• chemical, mechanical

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NGSS.HS-PS3-3

A drawn bow possesses mechanical energy in the form of _______________. After the arrow is released, the energy is transformed into _________________.

• potential energy; mechanical energy

• elastic potential energy; kinetic energy

• gravitational potential energy; kinetic energy

• elastic kinetic energy; mechanical kinetic energy

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NGSS.HS-PS3-3

NGSS.HS-PS3-2

Identify the correct energy transformation for the image below.

• Elastic --> Kinetic --> Sound

• Thermal --> Potential --> Gravitational

• Kinetic --> Gravitational --> Sound

• Sound --> Elastic --> Kinetic

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NGSS.HS-PS3-3

NGSS.HS-PS4-5