Listen
Source region(s) for air masses are ___ where winds are ____ and the surface is ____.
Question 1 options:
middle latitudes, strong, rough terrain
subarctic and subtropical, light, flat
Question 2 (1 point)
Listen
____ is where air masses come together to create weather events. Air masses are usually classified according to their_____, both of which usually remain fairly uniform in any horizontal direction.
Question 2 options:
Subarctic and subtropical, pressure and wind direction
Middle latitudes, temperature and humidity
Question 3 (1 point)
Listen
Air masses are grouped into _____ general categories according to their ______. Air masses that originate in polar latitudes are designated by the capital letter “P” (for polar); those that form in warm tropical regions are designated by the capital letter “T” (for tropical). If the source region is land, the air mass will be dry and the lowercase letter _____ precedes the P or T. If the air mass originates over water, it will be moist — at least in the lower layers — and the lowercase letter ____ precedes the P or T.
Question 3 options:
three, strength, “d” (for dry), “w” (for wet)
four, seasonality, “l” (for land), “o” (for ocean)
five, source region, “c” (for continental), “m” (for maritime)
Question 4 (1 point)
Listen
The bitterly cold weather that invades southern Canada and the United States in winter is associated with _____. These air masses originate over the ice- and snow-covered regions of the arctic, northern Canada, and Alaska where long, clear nights allow for _____ of the surface.
Question 4 options:
cP, cA; strong radiational cooling
cT, cP; cooling by subsidence
mP, cP; cooling by advection
Question 5 (1 point)
Listen
Air masses move as a response to ____. In the Northern Hemisphere winter, ____ pressure systems move bitterly cold ____ air masses southward where such air masses bring cold weather outbreaks.
Question 5 options:
mid-level winds, Icelandic and Aleutian Low, mP
winds aloft, Siberian and Canadian High, cA
surface winds, Pacific and Bermuda High, cP
