WX 201: Exam 1 Flashcards
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Questions and Answers

What is the temperature of the tropopause?

  • is nearly the same as the sun's temperature
  • is much colder than the temperature at the earth's surface (correct)
  • has never been measured
  • is close to the temperature at Earth's surface
  • is much warmer than the temperature at Earth's surface
  • Which atmospheric layer contains the most mixing and overturning of air?

  • exosphere
  • ionosphere
  • mesosphere
  • troposphere (correct)
  • stratosphere
  • Air molecules are held near Earth by/through:

  • gravity (correct)
  • winds in the atmosphere
  • chemical reactions
  • intermolecular forces
  • air pressure
  • The gas that absorbs most of the harmful ultraviolet radiation in the stratosphere is:

    <p>ozone</p> Signup and view all the answers

    Typically, water vapor occupies about what percentage of the air's volume near Earth's surface?

    <p>less than 4 percent</p> Signup and view all the answers

    There are considerably more air molecules near Earth's surface than higher up, which means, in comparison, air near the surface:

    <p>is more dense</p> Signup and view all the answers

    Wind direction is:

    <p>the direction from which the wind is blowing</p> Signup and view all the answers

    Which weather element ALWAYS decreases as we climb upward in the atmosphere?

    <p>Pressure</p> Signup and view all the answers

    Which of the following is considered a variable gas in Earth's atmosphere?

    <p>water vapor</p> Signup and view all the answers

    Almost all of Earth's weather occurs in the:

    <p>troposphere</p> Signup and view all the answers

    The rate at which temperature decreases with increasing altitude is known as the:

    <p>lapse rate</p> Signup and view all the answers

    At night, when the weather is extremely cold and dry, atmospheric pressure:

    <p>decreases with increasing altitude</p> Signup and view all the answers

    In a volume of air near Earth's surface today, ____ occupies 78 percent and ____ nearly 21 percent.

    <p>nitrogen; oxygen</p> Signup and view all the answers

    The only substance near Earth's surface that is found naturally in the current atmosphere as a solid, liquid, and a gas is:

    <p>water</p> Signup and view all the answers

    The atmospheric layer in which we live is called the:

    <p>troposphere</p> Signup and view all the answers

    The horizontal transport of any atmospheric property by the wind is called:

    <p>advection</p> Signup and view all the answers

    The heat energy released when water vapor changes to a liquid is called:

    <p>latent heat of condensation</p> Signup and view all the answers

    The atmospheric greenhouse effect is produced mainly by the absorption and re-emission of:

    <p>infrared radiation by the atmosphere</p> Signup and view all the answers

    Study Notes

    Temperature and Atmospheric Layers

    • The temperature of the tropopause is significantly colder than at Earth's surface.
    • The troposphere is the atmospheric layer with the most mixing and overturning of air.
    • Air molecules are retained near Earth due to gravity.

    Ozone and Atmospheric Composition

    • Ozone in the stratosphere absorbs harmful ultraviolet radiation.
    • Water vapor typically occupies less than 4% of the air's volume near Earth's surface.
    • Near Earth's surface, the air is denser due to a higher concentration of air molecules.

    Wind and Atmospheric Pressure

    • Wind direction indicates the direction from which the wind is blowing, not where it is going.
    • Atmospheric pressure consistently decreases with altitude.

    Variable Gases and Weather

    • Water vapor is classified as a variable gas in Earth's atmosphere.
    • Almost all weather on Earth occurs in the troposphere.

    Temperature Profiles and Lapse Rate

    • The lapse rate defines the rate of temperature decrease with increasing altitude.
    • At night, in cold and dry conditions, atmospheric pressure decreases with altitude.

    Composition of Air

    • In air at Earth’s surface, nitrogen comprises about 78% and oxygen about 21%.
    • Water is the only substance that exists naturally as a solid, liquid, and gas in the current atmosphere.

    Atmospheric Layers and Heat Transfer

    • The troposphere is the atmospheric layer where humans reside.
    • Advection refers to the horizontal transport of atmospheric properties by wind.
    • The latent heat of condensation is the heat energy released when water vapor converts to liquid.

    Greenhouse Effect

    • The atmospheric greenhouse effect results mainly from the absorption and re-emission of infrared radiation by the atmosphere.

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    Test your knowledge with these WX 201 Exam 1 flashcards. Each card presents a key concept related to atmospheric science and weather patterns. Challenge yourself and reinforce your understanding of the tropopause and atmospheric layers.

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