What does the law of conservation of energy state about energy in the universe?

• Energy can be created and destroyed as needed.

• Energy remains constant and only changes form.

• Energy gradually diminishes over time.

• Energy can disappear without changing form.

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NGSS.MS-PS3-2

NGSS.MS-PS3-5

According to the text, what happens when a car engine burns gasoline?

• It destroys the chemical energy in gasoline.

• It converts chemical energy into mechanical energy.

• It creates new energy from gasoline.

• It stores energy without changing its form.

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NGSS.MS-PS3-5

What new form of energy do scientists at the U.S. Department of Energy believe they have discovered?

• Static energy

• Light energy

• Dark energy

• Sound energy

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NGSS.MS-PS3-4

Which of the following is an example of converting radiant energy into another form of energy?

• A car engine running

• Solar photovoltaic cells working

• Gasoline being stored

• A bicycle moving

What is energy efficiency?

• The amount of energy wasted by a system

• The amount of useful energy obtained from a system

• The total energy a system can use

• The speed at which a system uses energy

What happens when energy is converted from one form to another?

• It creates a new form of energy that is always useful

• It does not involve any conversion processes

• It involves a conversion into useable or unusable forms of energy

• It increases the total amount of energy in the system

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NGSS.MS-PS1-4

NGSS.MS-PS3-5

How efficient is the human body at converting food into useful work?

• About 50% efficient

• Less than 5% efficient

• More than 75% efficient

• Exactly 25% efficient

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What is the rest of the energy converted to in the human body when it is not used for useful work?

• It is stored as extra food

• It is lost as sound energy

• It is converted to heat

• It becomes light energy

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What are the two basic categories of energy?

• Thermal and Radiant Energy

• Chemical and Mechanical Energy

• Potential and Kinetic Energy

• Electrical and Nuclear Energy

Which type of energy is stored in the bonds of atoms and molecules?

• Kinetic Energy

• Thermal Energy

• Radiant Energy

• Chemical Energy