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?

Energy intensity is a measure of:

  • Correct!

    Energy intensity is a measure of a nation's energy efficiency represented through energy use per unit of GDP (Gross Domestic Product).

  • Sorry, that’s incorrect.

    Energy intensity is a measure of a nation's energy efficiency represented through energy use per unit of GDP (Gross Domestic Product).

  • Sorry, that’s incorrect.

    Energy intensity is a measure of a nation's energy efficiency represented through energy use per unit of GDP (Gross Domestic Product).

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.

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.

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.

How much carbon dioxide is emitted by the average U.S. car driving one mile?

  • Sorry, that’s incorrect.

    The average U.S. car gets 21.4 mpg. About 19 pounds of carbon dioxide are emitted for every gallon burned, or 0.9 lb/mile.

  • Sorry, that’s incorrect.

    The average U.S. car gets 21.4 mpg. About 19 pounds of carbon dioxide are emitted for every gallon burned, or 0.9 lb/mile.

  • Correct!

    The average U.S. car gets 21.4 mpg. About 19 pounds of carbon dioxide are emitted for every gallon burned, or 0.9 lb/mile.

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.

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.

About 21% of the electricity used in residential and commercial buildings goes to what use?

  • Sorry, that’s incorrect.

    Roughly 21% of the electricity used in residential and commercial buildings goes to lighting.

  • Sorry, that’s incorrect.

    Roughly 21% of the electricity used in residential and commercial buildings goes to lighting.

  • Correct!

    Roughly 21% of the electricity used in residential and commercial buildings goes to lighting.

  • Sorry, that’s incorrect.

    Roughly 21% of the electricity used in residential and commercial buildings goes to lighting.

In the United States, which economic sector releases the most CO2?

  • Sorry, that’s incorrect.

    In the United States, the transportation sector releases the most CO2. In 2006, the transportation sector released nearly 2 billion metric tons of carbon dioxide, nearly all of which was from oil.

  • Sorry, that’s incorrect.

    In the United States, the transportation sector releases the most CO2. In 2006, the transportation sector released nearly 2 billion metric tons of carbon dioxide, nearly all of which was from oil.

  • Correct!

    In the United States, the transportation sector releases the most CO2. In 2006, the transportation sector released nearly 2 billion metric tons of carbon dioxide, nearly all of which was from oil.

  • Sorry, that’s incorrect.

    In the United States, the transportation sector releases the most CO2. In 2006, the transportation sector released nearly 2 billion metric tons of carbon dioxide, nearly all of which was from oil.

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Energy Hands-on

Energy Defined

Gigawatt

One billion watts, a watt being a unit of measure of power, or how fast energy is used. Gigawatts are typically used to describe very large quantities of power, such as the power carried by a major section of the U.S. electrical grid.

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