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5 Written questions

5 Matching questions

  1. Explain pressure gradients.
  2. What do low pressure cells tend to do?
  3. Isoheight or contour line is what?
  4. Isobar?
  5. Describe friction forces.
  1. a Low pressure cells tend to ascend and converge.
  2. b
    Pressure gradients drive air from an area of high pressure to an area of low pressure, creating winds.
  3. c Equal elevation.
  4. d
    Friction forces drag winds as they move across various surfaces. This effect decreases with height above a surface, and causes air spiraling out of a high pressure cell to turn clockwise (anticyclone). Air spiraling out of a low pressure cell turns counter-clockwise (cyclone). NOTE that in the Southern Hemisphere, this effect is in reverse: high pressures produce cyclones, and low pressures produce anticyclones.
  5. e Equal pressure.

5 Multiple choice questions

  1. The ITCZ stands for the Intertropical Convergence Zone, which is the area along the equator where a discontinuous series of thunderstorms occurs, due to the uplift caused by the convergence of winds and solar heating of the ground along the equator.
  2. Equal wind speed.

  3. The Coriolis Effect deflects winds fro ma straight line in relation to the Earth's rotating surface. Earth's rotation adds the Coriolis Effects and a "twist" to air movements. In the Northern Hemisphere, winds are deflected to the right, or the east. In the Southern Hemisphere, winds are deflected to the left, or the west.
  4. Air pressure tendency is important, along with the air pressure reading on a barometer. Falling air pressure, which corresponds to a decrease in the length of mercury in the column on a mercurial barometer, generally indicates stormy weather.

  5. The Jet Stream is a relatively narrow corridor of very strong winds near the tropopause.

5 True/False questions

  1. What are Trade Winds?Trade Winds blow out of the equator side of the anticyclones. In the Northern Hemisphere, they are the Northeasterly Trade Winds. They are the most persistent winds in the world, blowing in the same direction about 80% of the time.

          

  2. What are doldrums?Doldrums refers to a broad east-west belt of light winds that occur along the equator where the Trade Winds from the northern and southern hemispheres converge.

          

  3. Describe land-sea breezes.
    Friction forces drag winds as they move across various surfaces. This effect decreases with height above a surface, and causes air spiraling out of a high pressure cell to turn clockwise (anticyclone). Air spiraling out of a low pressure cell turns counter-clockwise (cyclone). NOTE that in the Southern Hemisphere, this effect is in reverse: high pressures produce cyclones, and low pressures produce anticyclones.

          

  4. What does tertiary circulation in the atmosphere entail?Primary circulation entails global circulation - the mass movement of air all over the globe.

          

  5. Isohyet?Equal rainfall.

          

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