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