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.MS-PS3-4

NGSS.MS-PS3-5

What kind of energy does an object possess when it's resting on top of the hill?

• Potential Energy

• Chemical Energy

• Kinetic Energy

• All of the above

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NGSS.MS-PS3-2

What force causes a roller coaster cart to slow down the most?

• friction

• weight

• gravity

• air resistance

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NGSS.MS-PS2-2

NGSS.MS-PS3-5

What is the formula for Kinetic Energy?

• KE = mass x velocity

• KE= 1/2 x mass x velocity ²

• KE = mass x gravity x height

• KE = mass x velocity / 2

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NGSS.MS-PS3-1

The law of energy conservation says the total energy before the change _______ the total energy after it

• is less than
• is more than
• affects
• equals

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NGSS.MS-PS3-5

Which 2 letters have the most kinetic energy

• W & Y
• X & Z

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NGSS.MS-PS3-1

What happens when the ball goes from the highest position to the lowest position

• PE and KE increases and decreases together

• Impossible to know without knowing the mass of the object

• the PE decreases while KE increases

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NGSS.MS-PS3-1

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

NGSS.MS-PS3-4

NGSS.MS-PS3-5

A 1.0 kg ball is stationary at the top of a hill that is 10.0 meters in height. The ball rolls all the way down the hill. What is its gravitational potential energy at the bottom of the hill?

• 0 joules

• 98 joules

• 49 joules

• 38 joules

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NGSS.MS-PS3-2

Which form of energy is represented in this image?

• kinetic

• thermal

• potential

• radiant

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NGSS.MS-PS3-1

NGSS.MS-PS3-5