Law of Conservation of Energy

The Law of Conservation of Energy states:

• Energy can created or destroyed but not transformed 
• Energy cannot be created or destroyed, it can only transformed
• Energy can't be created, destroyed or transformed

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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

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Energy can be created.

• True
• False

Energy cannot be destroyed.

• True 
• False

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

• Elastic
• Nuclear 
• Gravitational
• Chemical

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Energy is the ability _____________.

• to do work
• to power things
• to move objects
• to turn on a light

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

• 
• 
• 
• 

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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-PS3-2

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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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