Chapter 11 Flashcards
Air masses are usually classified according to their what ______
Temperature and Humidity
The Rockies sierra Nevada cascades normally protect the ____ from the onslaught of arctic air
Pacific northwest
_____ Air masses are responsible for the bitter cold winter weather that can cover wide sections of North America
Polar and arctic
Where does the human, subtropical air that affects much of the weather east of the Rockies originate
Over the golf of Mexico and the Caribbean Sea
An Air mass that controls the weather in a region for a prolonged period is sometimes referred to as ______ weather
Airmass
A front is the transition zone between two air masses of different ____
Densities
A stationary front has essentially no ____
Movement
In elongated area of low pressure is known as an
Trough
Cold fronts that move in from the east, or northeast, are called ____
“Back door” cold fronts
Heading toward the warm front, one would notice ____
Cirrus clouds
In a warm occlusion, the upper level cold front precedes the surface ____ front.
Occluded
In the southern Great Plains, warm, humid air may be separated from warm, dry air along a boundary called an _____
Dry line
A _______ refers to a cold front that is rapidly approaching the slower moving warm front
Cold occlusion
An upper-air front _____
May or may not extend to the surface
A ______ typically moves faster than a _____
Cold front , warm front
