Discussion: Advection And Radiation

Discussion: Advection And Radiation

Discussion: Advection And Radiation

12) How can condensation be triggered to form clouds or fog?

A) Cool the air to its dew point.

B) Add sufficient water vapor to the air so that it reaches saturation.

C) Either of the above will work.

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D) Neither of the above will work.

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13) What two kinds of fog are the result of adding moisture to a layer of air?

A) radiation and upslope         B) advection and radiation

C) steam and frontal                D) upslope and steam


14) The Sahara and Australian deserts (among others) are associated with the ________.

A) anticyclone            B) subpolar low                       C) subtropical high      D) equatorial low


15) The zone of subsiding dry air which encircles the globe near 30° latitude, north and south, is known as the ________.

A) subtropical high      B) Hadley cell              C) polar front               D) trade winds


16) When the pressure gradient force is balanced by the Coriolis force, high altitude ________ move parallel to isobars.

A) geostrophic winds   B) monsoons               C) valley breezes         D) chinooks


17) Which of these factors influence the magnitude of the Coriolis Effect (force)?

A) wind speed            B) wind direction

C) latitude                    D) both wind speed and latitude



Examine the map showing air pressure in millibars. Which of the four lettered locations deserves a wind hazard alert?

A) A                B) B                 C) C                 D) D


19) Because unequal heating of Earth’s surface generates these pressure differences, ________ is/are the ultimate energy source for most wind.

A) solar radiation                     B) hot springs

C) the greenhouse effect                      D) caves




Examine the figure. Which of the four lettered columns shows the correct order of slowest wind symbols (top) to fastest wind symbols (bottom)?

A) A                B) B                 C) C                 D) D


21) A cyclone is ________.

A) another name for the low-pressure systems that take several days to travel across North America from west to east

B) the term for circulation around any low-pressure center, no matter how large or intense it is

C) another name for a tornado

D) another name for a hurricane


22) On a weather map, ________ are shown by a line with triangular points on one side.

A) dragon mouths        B) occluded fronts       C) warm fronts                        D) cold fronts




Examine the figure. Which of the symbols shown is used to illustrate a stationary front?

A) A                B) B                 C) C                 D) D


24) An air mass originating in the Gulf of Mexico should be labeled ________.

A) mT              B) cP                C) cT               D) mP


25) Should people be more concerned about tornado warnings or tornado watches?

A) tornado watches                  B) tornado warnings

C) both mean the same thing   D) neither are of concern



Fill in the blank. Write the word or phrase that best completes each statement or answers the question. (1 point each)

26) Relative to lower temperatures, high temperatures require ________ (more / the same amount / less) moisture to fully saturate the air.


27) Mixing ratio, relative humidity, and dew-point temperature are all ways of measuring the amount of ________ in the air.



Examine the photo. These balloons are rising because the ________ air inside the balloon is less dense than the surrounding air.


29) ________ occurs when warm air is forced up and over a mass of cooler air.


30) ________ is a cloud with its base at or very near the ground.


31) Updrafts in cumulonimbus clouds may loft small particles of ice through the cloud, coating them and producing ________.


32) ________ is the result of horizontal differences in air pressure.


33) For a low-pressure center to be maintained or strengthened, the surface convergence must be balanced by ________ aloft.


34) In the Northern Hemisphere, the Coriolis effect shifts objects to the ________ of their straight-line paths.


35) Chinook and Santa Ana winds are warm, dry winds created when air descends the leeward side of a mountain and ________ by compression.


36) Polar easterlies may dominate Alaska’s prevailing winds, and NE trade winds may dominate in Hawaii, but ________ dominate the prevailing winds of the “lower 48” (contiguous) United States.


37) ___________ is a situation where dense cold air actively advances into a region occupied by warmer air.


38) _________ is a situation where warmer air actively advances into a region occupied by dense cold air.


39) _________ is a scale for ranking how powerful a tornado is.


40) _________ is a scale for ranking how powerful a hurricane is.

#26-40 Vocabulary (extra words and/or phrases are included, not all will be used)

cold front

warm front

occluded front







Mohs Scale

enhanced Fujita intensity scale

Saffir-Simpson scale




water vapor

hot (warm)


freezing rain








frontal sparking

frontal wedging

reverse wedging

Discussion: Advection And Radiation

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