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Geog. 1710 Exam 2 (Ch. 8)
Ch. 8 Review Questions
32
Science
Undergraduate 1
10/22/2012

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Term
Weather is...
Definition
the short term condition of the atmosphere.
Term
Cimate is...
Definition
the long-term average of weather conditions and extremes in a region.
Term
TRUE/FALSE?
An air mass initially reflects the characteristics of its source region.
Definition
True.
Term
TRUE/FALSE?
An air mass is heterogeneous in terms of temperate and humidity.
Definition
False
Term
TRUE/FALSE?
Air masses tend to maintain their original characteristics as they migrate from their source regions.
Definition
False
Term
TRUE/FALSE?
Moist air is denser than dry air.
Definition
False
Term
Air masses that develop over Canada are examples of ___ air masses.
Definition
cP
Term
A well-developed, newly formed cP air mass would have... (3)
Definition
Cold temperatures, high pressure, and clear skies.
Term
The maritime tropical Pacific and maritime tropical Gulf and Atlantic air masses are...
Definition
different from one another because the Pacific air mass usually has lower specific humidity than the Gulf/Atlantic air mass.
Term
An mT air mass is likely to be _____ than a cT air mass because the mT air mass...
Definition
wetter; forms over the ocean.
Term
Name 3 situations that would result in the modification of the air mass.
Definition
1) An mT air mass moving across Texas
2) A cP air mass moving across the Great Lakes
3) A cT air mass moving across the Gulf of Mexico
Term
TRUE/FALSE?
Lake effect snow involves heavy snowfall on the leeward shores of the Great Lakes.
Definition
True
Term
The four atmospheric lifting mechanisms are...
Definition
convergent, convectional, orographic, and frontal.
Term
Summer afternoon thundershowers in the southeastern U.S. are more than likely a result of...
Definition
convection lifting.
Term
The term "orographic" refers to...
Definition
forced uplift due to the presence of a physical barrier.
Term
TRUE/FALSE?
Heavy rain and snow fall on the eastern sir of Cascades is due to orographic lifting.
Definition
False
Term
The term "rain shadow" refers to...
Definition
dry regions on the leeward side of mountain ranges.
Term
TRUE/FALSE?
Chinook winds are cold and dry winds.
Definition
False
Term
TRUE/FALSE?
Chinook winds form on the leeward side of mountains.
Definition
True
Term
The two types of fronts are...
Definition
cold and warm.
Term
After a cold front passes, the temperature ________ and the pressure ______. (relative to the conditions that existed prior to the passage of the front.)
Definition
decreases; increases
Term
TRUE/FALSE?
The energy source of thunderstorm is from the condensation of large amounts of water vapor in the clouds.
Definition
True
Term
Florida has the highest thunderstorm frequency in the U.S. because...
Definition
1) the Florida peninsula heats to high temperature during the day
2) mT air masses surround the peninsula
Term
TRUE/FALSE?
Tornadoes occur in every month except March and April in the U.S.
Definition
False
Term
TRUE/FALSE?
The peak month of tornado occurrence is November.
Definition
False
Term
The highest frequency of tornadoes in the U.S. occurs in...
Definition
Oklahoma
Term
Tropical cyclones are called ______ in North America, ______ in China, and ______ in Australia.
Definition
hurricanes; typhoons; cyclones
Term
TRUE/FALSE?
Tropical cyclones originate entirely within tropical air masses.
Definition
True
Term
The sea surface temperature (SST) must be greater than _____ for triggering a tropical cyclone.
Definition
26 degrees celsius
Term
TRUE/FALSE?
Tropical cyclones in the Northern Hemisphere rotate clock wisely.
Definition
False
Term
Which part of a hurricane consists of dry, descending air?
Definition
Eye
Term
TRUE/FALSE?
On weather maps, a warm front is represented by a line with small triangle spikes that point in the direction of frontal movement.
Definition
False
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