Energy Review

Which of the following best describes kinetic energy?

• The energy stored in an object due to its position.

• The energy an object possesses due to its motion.

• The energy released during a chemical reaction.

• The energy an object has due to its temperature.

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OK.SCI.7.PS3.1

If the mass of an object is doubled, how does this affect its kinetic energy, assuming speed remains constant?

• The kinetic energy is halved.

• The kinetic energy remains the same.

• The kinetic energy is doubled.

• The kinetic energy is quadrupled.

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OK.SCI.7.PS3.1

What happens to the potential energy of a system when two magnets are moved closer together?

• The potential energy increases.

• The potential energy decreases.

• The potential energy remains the same.

• The potential energy is converted to kinetic energy.

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OK.SCI.7.PS3.2

Develop a model to describe the potential energy change when a spring is compressed. Which of the following is true?

• The potential energy decreases as the spring is compressed.

• The potential energy remains constant as the spring is compressed.

• The potential energy increases as the spring is compressed.

• The potential energy is converted to thermal energy.

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OK.SCI.7.PS3.2

Which of the following is an example of energy transfer when kinetic energy changes?

• A book sitting on a shelf.

• A car accelerating on a highway.

• A light bulb turned off.

• A stationary ball on the ground.

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OK.SCI.7.PS3.5

Construct an argument to support the claim that energy is transferred when a ball is thrown upwards. What happens to the kinetic energy?

• It is transferred to potential energy as the ball rises.

• It remains constant throughout the motion.

• It is transferred to thermal energy.

• It is lost to the environment.

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OK.SCI.7.PS3.5

What is the relationship between the speed of an object and its kinetic energy?

• Kinetic energy is inversely proportional to the speed.

• Kinetic energy is directly proportional to the square of the speed.

• Kinetic energy is directly proportional to the speed.

• Kinetic energy is independent of the speed.

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OK.SCI.7.PS3.1

If a pendulum is released from a certain height, what happens to its potential energy as it swings down?

• It increases.

• It decreases.

• It remains constant.

• It is converted to sound energy.

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OK.SCI.7.PS3.2

Which of the following scenarios involves a change in potential energy?

• A car moving at a constant speed on a flat road.

• A book falling off a table.

• A light bulb glowing.

• A stationary bicycle.

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OK.SCI.7.PS3.2

How does the kinetic energy of an object change when its speed is tripled?

• It remains the same.

• It doubles.

• It triples.

• It increases by a factor of nine.

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OK.SCI.7.PS3.1