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The Amargosa Valley in eastern California desert often experiences a cold evening wind that blows downvalley.Which of the following might explain this phenomenon?


A) Daytime heating causes a local low pressure that causes air to rush in by evening.
B) Moist Pacific air rising over the Sierra Nevada Mountains produces mountain precipitation,and as this air spills off the eastern escarpment,it forms the valley wind.
C) Night time cooling upvalley produces a cold,unstable air mass that is funneled down the valley to produce a valley wind.
D) It is a nighttime land breeze and there should be an accompanying daytime seabreeze up valley.

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

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Most of the people living in the United States are under the influence of the wind belt known as the westerlies.

A) True
B) False

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What is the Southern Oscillation?


A) the intermittent switch from El Niño to La Niña conditions in the equatorial Pacific
B) the periodic intense cyclonic storms from Antarctica
C) the weather pattern that changes tropical cyclone activity in the southern ocean
D) the 10-year cycle in winter storm activity in the temperate zone of the Southern Hemisphere

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

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If you live in southwestern North America and are experiencing drought conditions,what do you hope will happen?


A) A La Niña period will begin.
B) An El Niño period will begin.
C) Conditions will return to a normal,with neither La Niña nor El Niño.
D) The temperatures will decrease in the eastern equatorial Pacific.

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

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Upper air winds ________.


A) are generally faster than surface winds
B) are unaffected by the Coriolis force
C) are greatly influenced by friction
D) both A and B

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

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The ultimate cause of a sea breeze is the unequal heating of land and water.

A) True
B) False

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This pressure zone is associated with abundant precipitation and warm temperatures.


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

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

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Standard sea level pressure in inches of mercury is ________.


A) 7) 52 inches
B) 14.70 inches
C) 28.70 inches
D) 29.92 inches

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

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Closely spaced isobars indicate ________.


A) high pressure gradient and high winds
B) high pressure gradient and likely gusty winds
C) geostrophic conditions
D) low pressure gradient and weak gusty winds

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

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A low pressure center is called a(n)________.

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The existence of jet streams was first determined by Ben Franklin as a result of his kite experiments.

A) True
B) False

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A surface low pressure system will not strengthen unless there is high pressure aloft.

A) True
B) False

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Inches of mercury is something that would only be used in America.Elsewhere in the world,the mercury height would be in millimeters,or about 760mm (76cm) .Mercury has a density of about 13.56 g/cm3,or in other words,each cm of mercury weighs about 13,300 dynes.So 760mm of mercury weighs 1,013,000 dynes.1 mb is 1 dyne/cm2,so what is the air pressure in mb?


A) 760 mb
B) 1,000,000 mb
C) 1013 mb
D) 1) 013 mb

E) All of the above
F) None of the above

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

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In the Southern Hemisphere,the winds associated with a low pressure system blow ________.


A) clockwise and toward the center
B) counterclockwise and toward the center
C) clockwise and outward from the center
D) counterclockwise and outward from the center

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

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Why are coastal and mountainous regions often much more windy than other locations at similar latitudes? Also,from this and earlier chapters on meteorology,are there other weather characteristics that are perhaps unique or different for these areas?

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In coastal areas during the warm summer ...

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If stormy weather were approaching,the pressure tendency would probably be ________.


A) steady
B) rising
C) falling
D) none of these

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

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Warm winds that move down the leeward side of mountains are known as ________.

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chinook,fo...

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On the weather map below,describe the wind pattern and the relationship between the winds and isobars. On the weather map below,describe the wind pattern and the relationship between the winds and isobars.

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The winds are blowing away from the high...

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Why is the Santa Ana wind a danger signal in southern California?


A) It is a cold,dry winter wind that brings danger of hypothermia to people like the homeless living on the streets.
B) It drives people crazy with the howling winds,so crime goes up.
C) It is a warm,humid wind from Mexico that signals El Niño conditions and high potential for flooding.
D) It is a warm,dry wind that can quickly dry out brushlands and spread fires.

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

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