Quiz: Conservation of Energy

Your science class goes on a field trip to the nearby amusement park for an assignment. Before riding the roller coaster, your teacher has you observe other riders.

At what point will the roller coaster car have transformed the greatest amount of gravitational potential energy into kinetic energy?

• W

• X

• Y

• Z

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Between point W and point Z, the total amount of energy in the car...

• 1. stayed the same; it gained gravitational potential energy but lost kinetic energy.

• 1. stayed the same; it lost gravitational potential energy but gained kinetic energy.

• 1. changed; it gained gravitational potential energy and gained kinetic energy.

• 1. changed; it lost gravitational potential energy and lost kinetic energy.

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Choose the terms, in order, that best complete the sentence. As the car moves down the slope, the amount of __________ energy decreases while the amount of __________ energy increases.

• potential

• mechanical

• radiant

• kinetic

• thermal

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Look at the diagram of a light bulb on a simple circuit. Over time, the battery loses power and the bulb dims. Finally, it goes out. What happened to the energy?

• The battery creates new energy.

• There is no energy being transformed by the system.

• Energy is being destroyed by the system.

• Energy is leaving the system in the form of light.

Choose the words, in order, that correctly complete each sentence. Potential energy changing to kinetic energy is an example of energy _______. ________ can be transformed into a different form but is never created nor destroyed, so the total amount never changes. ________ implies that a loss of energy in one part of a system must correspond to a gain of energy in another part of the same system. Water that is held back by a dam is an example of ________ energy. Water flowing over a dam is an example of potential energy being transformed into ________ energy. Which terms best fit the sentences?

• kinetic

• transformation

• Conservation of energy

• potential

• Gravity

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What is a food web used to illustrate?

(a)  

• Conservation of energy
• Types of habitats

• Water cycle

• Weather patterns

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What process allows plants like grass to produce their own food?

• Photosynthesis

• Respiration

• Digestion

• Fermentation

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Why did the potential energy of the box increase?

• The box was moved to a higher position.

• The box produced potential energy.

• The box lost mass.

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Which type of energy increases when you compress a spring?

• elastic potential energy
• kinetic energy
• radiant energy
• sound energy

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Potential energy depends on

• mass and height

• height and speed

• mass and speed

• height and force

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