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You are watching the local weatherman on TV.You live in mid-latitudes in North America,and the weatherman says the winds aloft are blowing toward the northwest.Is this reasonable?


A) Yes,southeast winds are common at mid latitudes in North America.
B) Yes,northwest winds are common at mid latitudes in North America.
C) No,Northern Hemisphere winds aloft always move from west to east because of the Coriolis force.
D) No,mid-latitude winds always move from east to west because of the Coriolis force.

E) B) and C)
F) C) and D)

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The mercurial barometer was invented by ________.


A) Torricelli
B) Galileo
C) Newton
D) Watt

E) A) and D)
F) None of the above

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Closely spaced isobars indicate high wind speeds.

A) True
B) False

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The first instrument to measure air pressure was the ________ barometer.

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Two weather stations lie along a latitude line.The eastern station records a pressure of 1021mb,the western station records 1015mb.The 1020 isobar is closest to which station?

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High air pressure systems are usually associated with ________.


A) diverging winds
B) descending air
C) clear weather
D) all of these

E) A) and B)
F) A) and C)

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Low pressure at the surface also requires low pressure aloft for air to continue to flow toward the low.

A) True
B) False

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A sea breeze usually originates during the ________.


A) evening and flows toward the land
B) day and flows toward the land
C) evening and flows toward the water
D) day and flows toward the water

E) All of the above
F) A) and D)

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Tropical cyclones (aka hurricanes in the Atlantic) are intense low-pressure systems characterized by heavy rain and high winds.When a tropical cyclone passes an area,however,there are generally several days of clear,dry weather.Why might this occur?


A) The hurricane carries a cold front with it,which carries dry air.
B) The cyclone has sucked up all the moist air around it,leaving dry air behind.
C) The cyclone must have an outflow aloft,which feeds descending air surrounding the storm.
D) The spiral arms of the hurricane are storm fronts,and each carries descending air behind it.

E) B) and D)
F) All of the above

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Fast moving currents of air found near the top of the troposphere are called ________.


A) jet streams
B) chinooks
C) mesocyclones
D) El Niño

E) A) and C)
F) None of the above

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If you live on the east coast of Florida or the Gulf Coast,why might you hope for an El Niño year?


A) It will decrease the chances of heavy summer thunderstorms and floods.
B) It will decrease the probability of tropical cyclones.
C) It will bring clear,cool summer conditions,albeit dry.
D) It will produce a warmer summer,but with less rain than normal.

E) All of the above
F) A) and B)

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Coriolis effect jet stream friction pressure gradient force

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Asia has an intense monsoon,but North America also experiences a low-intensity monsoon.What causes monsoons?


A) Heating of the polar regions in summer due to long days causes air to flow toward the poles in summer,drawing moisture from warm ocean dominated air masses.
B) The heating of the continent during the summer produces a persistent low pressure over the continent that draws warm moist air masses from adjacent oceans.
C) The oceans warm faster than the continents during the summer and spawn cyclonic storms that move toward the continents.
D) The horse latitude high pressure system breaks down in summer,leading to monsoon moisture in desert locations like southwestern North America and India.

E) A) and B)
F) A) and C)

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Widely spaced isobars often indicate ________.


A) high winds
B) variable winds
C) light winds
D) cyclonic winds

E) A) and B)
F) None of the above

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The most precise instrument for measuring wind speed is a ________.


A) cup anemometer
B) wind vane
C) wind sock
D) wet bulb/dry bulb thermometer

E) C) and D)
F) B) and C)

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If the earth were not rotating,there would be no Coriolis force.

A) True
B) False

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Which of the following is not true for anticyclonic storms systems in the Northern Hemisphere?


A) The outward flow produces a clockwise circulation due to the Coriolis force.
B) The storm system is characterized by high pressure and descending air.
C) The storm system is characteristic of mid-latitude zones and is typically associated with fair weather.
D) The storm system is a low-latitude phenomena associated with outflow from tropical cyclones.

E) A) and B)
F) All of the above

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The surface wind zones that flow from the subtropics toward the equator are called the ________ winds.

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Where was the El Niño phenomena first recognized?


A) the Caribbean region
B) California
C) Central America
D) Peru and Ecuador

E) A) and C)
F) C) and D)

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Tropical cyclones produce the most intense low-pressure systems on earth.To develop and maintain this low pressure,what must happen aloft in this type of storm?


A) A strong jet stream flow must be present to maintain the inward flow.
B) A strong divergent flow (outflow) aloft must keep up with,or exceed,the inflow near the surface.
C) The storm must push the tropopause far into the stratosphere to maintain the low pressure.
D) Rain must fall to force thunderstorms to collapse to keep the air circulation going.

E) None of the above
F) A) and B)

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