Exploring Energy and Its Types

Which of the following is an example of kinetic energy?

• A stretched rubber band

• A moving car

• A battery

• A book on a shelf

What type of energy is stored in food?

• Chemical energy

• Electrical energy

• Sound energy

• Light energy

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Which of the following is a renewable energy source?

• Coal

• Natural gas

• Solar energy

• Oil

What is the main difference between potential energy and kinetic energy?

• Potential energy is energy of motion, kinetic energy is stored energy

• Kinetic energy is energy of motion, potential energy is stored energy

• Both are types of heat energy

• Both are types of sound energy

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A ball is held at the top of a hill. What type of energy does it have due to its position?

• Kinetic energy

• Sound energy

• Potential energy

• Electrical energy

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If you rub your hands together quickly, they become warm. Which energy transformation best explains this?

• Electrical energy to light energy

• Kinetic energy to thermal energy

• Chemical energy to sound energy

• Potential energy to nuclear energy

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Which of the following best describes how wind turbines generate electricity?

• They use chemical reactions to create energy

• They convert wind’s kinetic energy into electrical energy

• They store solar energy for later use

• They use heat from the Earth’s core

A hydroelectric dam uses water stored at a height. When the water is released, it turns turbines to generate electricity. Which energy transformation occurs in this process?

• Chemical energy to light energy

• Potential energy to kinetic energy to electrical energy

• Sound energy to thermal energy

• Electrical energy to potential energy

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A student claims that a stretched bow has more potential energy than a bow that is not stretched. Explain why this is true using evidence from what you know about energy.

• The stretched bow has more mass, so it has more energy.

• Stretching the bow stores energy in it, increasing its potential energy.

• The color of the bow changes when stretched, which adds energy.

• The bow makes a sound when stretched, which is energy.

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Imagine you are designing a new city park and want to use only renewable energy sources for lighting. Which combination of energy sources would be best, and why?

• Coal and oil, because they are easy to use

• Solar and wind, because they are renewable and do not run out

• Natural gas and nuclear, because they are powerful

• Wood and gasoline, because they are common

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