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?

True or False: Burning coal in electric power plants is a major source of CO2 and other emissions. However, its use doesn't have negative consequences beyond the emissions caused by combustion.

  • Sorry, that’s incorrect.

    Mining coal disturbs the land and modifies the chemistry of rainwater runoff, which in turn affects stream and river water quality.

  • Correct!

    Mining coal disturbs the land and modifies the chemistry of rainwater runoff, which in turn affects stream and river water quality.

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.

In 2008, of the four economic sectors, which used the most energy in the United States?

  • Sorry, that’s incorrect.

    In 2008, industry used 31% of the total energy used; next was transportation at 28%, then residential at 22%, and commercial at 19%.

  • Sorry, that’s incorrect.

    In 2008, industry used 31% of the total energy used; next was transportation at 28%, then residential at 22%, and commercial at 19%.

  • Sorry, that’s incorrect.

    In 2008, industry used 31% of the total energy used; next was transportation at 28%, then residential at 22%, and commercial at 19%.

  • Correct!

    In 2008, industry used 31% of the total energy used; next was transportation at 28%, then residential at 22%, and commercial at 19%.

Nuclear power provided what percentage of the total U.S. energy supply in 2008?

  • Sorry, that’s incorrect.

    Nuclear power accounted for 9% of the U.S. energy supply in 2008.

  • Correct!

    Nuclear power accounted for 9% of the U.S. energy supply in 2008.

  • Sorry, that’s incorrect.

    Nuclear power accounted for 9% of the U.S. energy supply in 2008.

Which source(s) of energy are not nuclear in origin?

  • Sorry, that’s incorrect.

    Tidal energy is gravitational in origin. Solar energy comes from nuclear reactions in the sun.

  • Sorry, that’s incorrect.

    Tidal energy is gravitational in origin. Geothermal energy comes from radioactive decay inside the earth.

  • Correct!

    Tidal energy is gravitational in origin. Solar energy comes from nuclear reactions in the sun, and geothermal energy comes from radioactive decay inside the earth.

  • Sorry, that’s incorrect.

    Tidal energy is gravitational in origin. Solar energy comes from nuclear reactions in the sun, and geothermal energy comes from radioactive decay inside the earth.

Combustion of gasoline and diesel fuel emits which of the following?

  • Sorry, that’s incorrect.

    All of the above are emitted by vehicles running on gasoline and diesel fuel.

  • Sorry, that’s incorrect.

    All of the above are emitted by vehicles running on gasoline and diesel fuel.

  • Sorry, that’s incorrect.

    All of the above are emitted by vehicles running on gasoline and diesel fuel.

  • Sorry, that’s incorrect.

    All of the above are emitted by vehicles running on gasoline and diesel fuel.

  • Correct!

    All of the above are emitted by vehicles running on gasoline and diesel fuel.

Which of the following is frequently used as a unit of measurement for the energy content of fuels?

  • Sorry, that’s incorrect.

    The British Thermal Unit, or Btu, is frequently used as a measure for energy content of fuels. One gallon of gasoline contains about 124,000 Btu.

  • Correct!

    The British Thermal Unit, or Btu, is frequently used as a measure for energy content of fuels. One gallon of gasoline contains about 124,000 Btu.

  • Sorry, that’s incorrect.

    The British Thermal Unit, or Btu, is frequently used as a measure for energy content of fuels. One gallon of gasoline contains about 124,000 Btu.

  • Sorry, that’s incorrect.

    The British Thermal Unit, or Btu, is frequently used as a measure for energy content of fuels. One gallon of gasoline contains about 124,000 Btu.

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.

How many commercial coal-fired power plants utilize carbon capture and sequestration practices in 2009?

  • Correct!

    In 2009, there were no commercial coal-fired plants utilizing carbon capture and sequestration.

  • Sorry, that’s incorrect.

    In 2009, there were no commercial coal-fired plants utilizing carbon capture and sequestration.

  • Sorry, that’s incorrect.

    In 2009, there were no commercial coal-fired plants utilizing carbon capture and sequestration.

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Energy Defined

Ampere

A unit of measure for electric current that refers to the amount of electric charge passing a point per unit of time. Ampere is frequently abbreviated to “amp.”

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