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?

What percentage of America's total energy came from wind in 2008?

  • Correct!

    In 2008, wind accounted for 0.5% of America's energy portfolio.

  • Sorry, that’s incorrect.

    In 2008, wind accounted for 0.5% of America's energy portfolio.

  • Sorry, that’s incorrect.

    In 2008, wind accounted for 0.5% of America's energy portfolio.

As an automobile fuel, what amount of hydrogen compares with a gallon of gasoline?

  • Correct!

    A gallon of gasoline contains about the same energy as a kg of hydrogen. Although fuel cells are expected to be twice as efficient as gasoline vehicles, hydrogen is very diffuse and storing an ample supply on board represents an engineering challenge.

  • Sorry, that’s incorrect.

    A gallon of gasoline contains about the same energy as 1 kg of hydrogen. Although fuel cells are expected to be twice as efficient as gasoline vehicles, hydrogen is very diffuse and storing an ample supply on board represents an engineering challenge.

  • Sorry, that’s incorrect.

    A gallon of gasoline contains about the same energy as 1 kg of hydrogen. Although fuel cells are expected to be twice as efficient as gasoline vehicles, hydrogen is very diffuse and storing an ample supply on board represents an engineering challenge.

The consumption of energy worldwide is projected to rise by how much between 2006 and 2030?

  • Sorry, that’s incorrect.

    Worldwide consumption of energy sources is projected to rise by nearly 50% between 2006 and 2030.

  • Correct!

    Worldwide consumption of energy sources is projected to rise by nearly 50% between 2006 and 2030.

  • Sorry, that’s incorrect.

    Worldwide consumption of energy sources is projected to rise by nearly 50% between 2006 and 2030.

In 2008, approximately how much energy did the United States use?

  • Sorry, that’s incorrect.

    In 2008, the United States used approximately 99.2 quads. One quad is about as much total energy as the city of Chicago requires in one year.

  • Correct!

    In 2008, the United States used approximately 99.2 quads. One quad is about as much total energy as the city of Chicago requires in one year.

  • Sorry, that’s incorrect.

    In 2008, the United States used approximately 99.2 quads. One quad is about as much total energy as the city of Chicago requires in one year.

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.

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 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.

How much of the U.S. supply of natural gas is imported from outside North America?

  • Correct!

    Less than 2% of the U.S. supply of natural gas is imported from outside North America.

  • Sorry, that’s incorrect.

    Less than 2% of the U.S. supply of natural gas is imported from outside North America.

  • Sorry, that’s incorrect.

    Less than 2% of the U.S. supply of natural gas is imported from outside North America.

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.

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Energy Hands-on

Energy Defined

Metric Ton

Also referred to as a metric tonne, it is a measurement of mass equal to 1,000 kilograms, or the mass of one cubic meter of water. This is different from the short ton, a unit of measure commonly used in the United States, which is equal to 2,000 lbs.

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