The National Academies: What You Need To Know About Energy

The National Academies

What You Need To Know About Energy

What do you know about energy?

How much electricity does an average U.S. household consume each year?

  • Sorry, that’s incorrect.

    The average U.S. household consumes an average of 10,000 kilowatt-hours each year.

  • Sorry, that’s incorrect.

    The average U.S. household consumes an average of 10,000 kilowatt-hours each year.

  • Correct!

    The average U.S. household consumes an average of 10,000 kilowatt-hours each year.

Most of the world's energy originates from which two primary sources:

  • Correct!

    The energy we capture for use on Earth comes largely from the sun or from nuclear forces local to our own planet.

  • Sorry, that’s incorrect.

    The energy we capture for use on Earth comes largely from the sun or from nuclear forces local to our own planet.

  • Sorry, that’s incorrect.

    The energy we capture for use on Earth comes largely from the sun or from nuclear forces local to our own planet.

True or False: Lighting accounts for 18% of all electricity used in the United States.

  • Correct!

    Lighting accounts for 18% of the electricity used in the United States. A 12% decrease in overall electricity use in buildings could be realized if incandescent bulbs were replaced with CFL or LED bulbs.

  • Sorry, that’s incorrect.

    Lighting accounts for 18% of the electricity used in the United States. A 12% decrease in overall electricity use in buildings could be realized if incandescent bulbs were replaced with CFL or LED bulbs.

Which renewable energy source contributed the most to the total energy consumed in the United States in 2008?

  • Sorry, that’s incorrect.

    Out of all the renewable energy sources, biomass contributed the most to U.S. energy consumption in 2008.

  • Sorry, that’s incorrect.

    Out of all the renewable energy sources, biomass contributed the most to U.S. energy consumption in 2008.

  • Sorry, that’s incorrect.

    Out of all the renewable energy sources, biomass contributed the most to U.S. energy consumption in 2008.

  • Correct!

    Out of all the renewable energy sources, biomass contributed the most to U.S. energy consumption in 2008.

True or False: Increasing the energy supply is the only answer to a stable energy future.

  • Sorry, that’s incorrect.

    Reducing demand through the improved efficiency of devices and procedures is another way to improve our energy situation.

  • Correct!

    Reducing demand through the improved efficiency of devices and procedures is another way to improve our energy situation.

What percentage of the coal mined in the United States was used to generate electricity in 2006?

  • Sorry, that’s incorrect.

    90% of the coal mined in the United States was used to generate electricity in 2006.

  • Sorry, that’s incorrect.

    90% of the coal mined in the United States was used to generate electricity in 2006.

  • Correct!

    90% of the coal mined in the United States was used to generate electricity in 2006.

What is the commonly accepted unit of measurement for electric current—or the amount of an electric charge passing a point per unit time?

  • Sorry, that’s incorrect.

    The ampere, or amp, is the most commonly used measurement for electric current.

  • Sorry, that’s incorrect.

    The ampere, or amp, is the most commonly used measurement for electric current.

  • Correct!

    The ampere, or amp, is the most commonly used measurement for electric current.

  • Sorry, that’s incorrect.

    The ampere, or amp, is the most commonly used measurement for electric current.

The United States is home to how many of the world's automobiles?

  • Sorry, that’s incorrect.

    With less than 5% of the world's population, the United States is home to one-third of the world's automobiles.

  • Correct!

    With less than 5% of the world's population, the United States is home to one-third of the world's automobiles.

  • Sorry, that’s incorrect.

    With less than 5% of the world's population, the United States is home to one-third of the world's automobiles.

The consumption of energy in the United States is projected to rise by how much between now and 2030?

  • Sorry, that’s incorrect.

    U.S. consumption of energy sources is projected to rise by 13% between now and 2030.

  • Correct!

    U.S. consumption of energy sources is projected to rise by 13% between now and 2030.

  • Sorry, that’s incorrect.

    U.S. consumption of energy sources is projected to rise by 13% between now and 2030.

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Energy Hands-on

Energy Defined

Intermittent Energy Source

An energy source characterized by output that is dependent on the natural variability of the source rather than the requirements of consumers. Solar energy is an example of an intermittent energy source since it is only available when the sun is shining. Wind is also an intermittent energy source.

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