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Exam 2 Air Masses and Fronts - Flashcards

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Class:EASC 101 - EARTH SCIENCE I
Subject:Earth Science
University:Southeastern Louisiana University
Term:Fall 2011
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rotate counterclockwise Middle-latitude cyclones
thunderstorms and other severe weather The type of weather most frequently associated with the front shown on the diagram above is:
lifting of warm air over cold Which of these is common to both cold and warm fronts?
days The typical amount of time it takes for an air mass to pass over a given area is on the order of a few
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mT What air-mass contributes to the formation of thunderstorms in the central U.S.?
the approximate latitude of the air mass source region air masses are identified by a pair of letters, one lowercase and one uppercase.  The uppercase letter (P, A, or T) refers to:
All warm air is displaced aloft, so the surface temperature pradient has been equalized. Why does occlusion lead to the demise of a mid-latitude cyclone?
sinking cold air and rising warm air the energy of a mid-latitude cyclone comes mainly from:
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mT The air mass type most likely to form thunderstorms is:
a steeper gradient and a faster advance rate Compared to warm fronts, cold fronts have:
rapidly falling An approaching wave cyclone would be indicated by a ______ barometer reading
cumulonimbus the cloud type most frequently associated with a cold front is:
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midlatitude cyclone Wave cyclone is also known as:
rising temperatures if a warm front is approaching, you can expect:
the leeward shores of the Great Lakes In the U.S., lake-effect snow occurs over which area?
cP The pronounced cooling that occurs on continents at high latitudes during winter leads to the formation of _____ air masses.
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mT the ____ air mass provides much of the moisture for the precipitation in the central and eastern U.S.
cP "Lake-effect" snow is associated with the ___ air mass.
have higher water vapor content Compared to continental air masses with the same air temperature, maritime air masses:
the air becomes more stable When an air mass is warmer than the surface over which it is moving:
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cold front Tornadoes are generally associated with which type of warm front?
cP and mT the air masses that have the greatest influence on weather conditions in the Midwest are:
mT air masses from the Gulf of Mexico Which region of origin for mT air masses has the most impact on North American weather?
clockwise middle-latitude cyclones rotateL
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is more violent but of shorter duration compared to other types of fronts, the weather associated with a cold front usually:
mountain ranges, cyclones, and anti-cyclones the stability of an air mass can be affected by
moisture content and temperature The two most important properties that should be relatively homogenous at the same altitude in an air mass are:
air-mass weather When an area is experiencing several consecutive days of rather constant weather, it is experiencing:
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advancing warm air overrides retreating cold air a warm front is said to exist when:
warm front the lifting of air and the resulting formation of clouds and rain is more gentle (gradual) for a
mT An air mass from the Gulf of Mexico is called:
temperature contrasts are greater Why is the number and intensity of wave cyclones greatest during the late fall, winter, and spring months?
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dependent on your location relative to the storm center the wind direction in a low pressure system is
cP Which air mass type is generally found on the poleward side of a midlatitude cyclone?
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 rotate counterclockwiseMiddle-latitude cyclones
 thunderstorms and other severe weatherThe type of weather most frequently associated with the front shown on the diagram above is:
 lifting of warm air over coldWhich of these is common to both cold and warm fronts?
 daysThe typical amount of time it takes for an air mass to pass over a given area is on the order of a few
 mTWhat air-mass contributes to the formation of thunderstorms in the central U.S.?
 the approximate latitude of the air mass source regionair masses are identified by a pair of letters, one lowercase and one uppercase.  The uppercase letter (P, A, or T) refers to:
 All warm air is displaced aloft, so the surface temperature pradient has been equalized.Why does occlusion lead to the demise of a mid-latitude cyclone?
 sinking cold air and rising warm airthe energy of a mid-latitude cyclone comes mainly from:
 mTThe air mass type most likely to form thunderstorms is:
 a steeper gradient and a faster advance rateCompared to warm fronts, cold fronts have:
 rapidly fallingAn approaching wave cyclone would be indicated by a ______ barometer reading
 cumulonimbusthe cloud type most frequently associated with a cold front is:
 midlatitude cycloneWave cyclone is also known as:
 rising temperaturesif a warm front is approaching, you can expect:
 the leeward shores of the Great LakesIn the U.S., lake-effect snow occurs over which area?
 cPThe pronounced cooling that occurs on continents at high latitudes during winter leads to the formation of _____ air masses.
 mTthe ____ air mass provides much of the moisture for the precipitation in the central and eastern U.S.
 cP"Lake-effect" snow is associated with the ___ air mass.
 have higher water vapor contentCompared to continental air masses with the same air temperature, maritime air masses:
 the air becomes more stableWhen an air mass is warmer than the surface over which it is moving:
 cold frontTornadoes are generally associated with which type of warm front?
 cP and mTthe air masses that have the greatest influence on weather conditions in the Midwest are:
 mT air masses from the Gulf of MexicoWhich region of origin for mT air masses has the most impact on North American weather?
 clockwisemiddle-latitude cyclones rotateL
 is more violent but of shorter durationcompared to other types of fronts, the weather associated with a cold front usually:
 mountain ranges, cyclones, and anti-cyclonesthe stability of an air mass can be affected by
 moisture content and temperatureThe two most important properties that should be relatively homogenous at the same altitude in an air mass are:
 air-mass weatherWhen an area is experiencing several consecutive days of rather constant weather, it is experiencing:
 advancing warm air overrides retreating cold aira warm front is said to exist when:
 warm frontthe lifting of air and the resulting formation of clouds and rain is more gentle (gradual) for a
 mTAn air mass from the Gulf of Mexico is called:
 temperature contrasts are greaterWhy is the number and intensity of wave cyclones greatest during the late fall, winter, and spring months?
 dependent on your location relative to the storm centerthe wind direction in a low pressure system is
 cPWhich air mass type is generally found on the poleward side of a midlatitude cyclone?
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