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?

Of the following fossil fuels, which is typically the least expensive for its energy content?

  • Sorry, that’s incorrect.

    In 2005, a million Btu of energy from coal cost approximately $2, versus $5 for natural gas and $10 for oil. However, prices can fluctuate due to changes in the economy and new government policies.

  • Sorry, that’s incorrect.

    In 2005, a million Btu of energy from coal cost approximately $2, versus $5 for natural gas and $10 for oil. However, prices can fluctuate due to changes in the economy and new government policies.

  • Correct!

    In 2005, a million Btu of energy from coal cost approximately $2, versus $5 for natural gas and $10 for oil. However, prices can fluctuate due to changes in the economy and new government policies.

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.

Which of the following is not a primary energy source?

  • Sorry, that’s incorrect.

    Electricity is a secondary energy source because it can only be produced from the use of primary energy sources such as coal, natural gas, or nuclear reactions.

  • Sorry, that’s incorrect.

    Electricity is a secondary energy source because it can only be produced from the use of primary energy sources such as coal, natural gas, or nuclear reactions.

  • Correct!

    Electricity is a secondary energy source because it can only be produced from the use of primary energy sources such as coal, natural gas, or nuclear reactions.

  • Sorry, that’s incorrect.

    Electricity is a secondary energy source because it can only be produced from the use of primary energy sources such as coal, natural gas, or nuclear reactions.

  • Sorry, that’s incorrect.

    Electricity is a secondary energy source because it can only be produced from the use of primary energy sources such as coal, natural gas, or nuclear reactions.

Which primary energy source did we depend on the most to generate electricity in the United States in 2008?

  • Sorry, that’s incorrect.

    In 2008, the United States depended most on coal to generate electricity. Coal provided approximately 49% of the electricity generated by the United States that year.

  • Sorry, that’s incorrect.

    In 2008, the United States depended most on coal to generate electricity. Coal provided approximately 49% of the electricity generated by the United States that year.

  • Correct!

    In 2008, the United States depended most on coal to generate electricity. Coal provided approximately 49% of the electricity generated by the United States that year.

  • Sorry, that’s incorrect.

    In 2008, the United States depended most on coal to generate electricity. Coal provided approximately 49% of the electricity generated by the United States that year.

Which of the following sources do experts expect will provide us with the “silver bullet” solution to our energy needs?

  • Sorry, that’s incorrect.

    There is no silver bullet. Tomorrow’s energy, like today’s, will come from a variety of sources.

  • Sorry, that’s incorrect.

    There is no silver bullet. Tomorrow’s energy, like today’s, will come from a variety of sources.

  • Sorry, that’s incorrect.

    There is no silver bullet. Tomorrow’s energy, like today’s, will come from a variety of sources.

  • Correct!

    There is no silver bullet. Tomorrow’s energy, like today’s, will come from a variety of sources.

Which residential usage consumes the largest amount of energy?

  • Sorry, that’s incorrect.

    Consuming the largest amount of energy, space heating accounts for 31% of all residential energy used. Space cooling accounts for an additional 12% of energy usage.

  • Sorry, that’s incorrect.

    Consuming the largest amount of energy, space heating accounts for 31% of all residential energy used. Space cooling accounts for an additional 12% of energy usage.

  • Correct!

    Consuming the largest amount of energy, space heating accounts for 31% of all residential energy used. Space cooling accounts for an additional 12% of energy usage.

  • Sorry, that’s incorrect.

    Consuming the largest amount of energy, space heating accounts for 31% of all residential energy used. Space cooling accounts for an additional 12% of energy usage.

True or False: U.S. domestic production of crude oil has declined since around 1970.

  • Correct!

    U.S. domestic production of crude oil peaked around 1970 at about 9.5 million barrels per day (MBD) and declined to about 5.1 MBD by 2006.

  • Sorry, that’s incorrect.

    U.S. domestic production of crude oil peaked around 1970 at about 9.5 million barrels per day (MBD) and declined to about 5.1 MBD by 2006.

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.

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.

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Energy Hands-on

Energy Defined

British Thermal Unit

A unit of measure for the energy content of fuels. One Btu is the amount of energy needed to raise a pound of water by one degree Fahrenheit.

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