+S8P2 Energy Unit Test

What is the law of conservation of energy?

• Energy is created when needed.
• Energy can be destroyed under certain conditions.
• Energy cannot be created or destroyed, only transformed.
• Energy is lost when transferred.

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NGSS.MS-PS3-5

Which of the following demonstrates potential energy?

• A moving car
• A compressed spring
• A spinning top
• A flowing river

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NGSS.MS-PS3-2

At which point does a swinging pendulum have the most kinetic energy?

• At its highest point

• Halfway between the highest and lowest points

• At its lowest point

• When its mass magically increases

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NGSS.MS-PS3-5

How does mass affect the gravitational potential energy (GPE) of an object?

• GPE decreases as mass increases.
• GPE increases as mass decreases.
• GPE increases as mass increases.
• Mass has no effect on GPE.

Which statement best describes heat transfer by conduction?

• Heat moves through empty space.
• Heat flows in currents within liquids or gases.
• Heat transfers directly between objects in contact.
• Heat spreads in all directions at once.

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NGSS.MS-PS3-4

What happens to kinetic energy if an object’s speed doubles?

• It doubles.
• It triples.
• It quadruples.

• It stays the same.

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NGSS.MS-PS3-1

Which energy transformation occurs in a solar panel?

• Electrical to chemical
• Radiant to electrical

• Thermal to Radiant

• Radiant to thermal

How does thermal energy flow?

• From cold to hot
• From hot to cold
• It does not flow.
• It flows in all directions equally.

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NGSS.MS-PS1-4

Why is insulation important in homes?

• It prevents cold air from leaving.
• It keeps energy from being lost.
• It increases energy production.
• It decreases air pressure.

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NGSS.MS-PS3-3

What type of energy is stored in food?

• Kinetic energy
• Chemical energy
• Thermal energy
• Electrical energy