Physical Geography: Ch7 (HW6)

Calm, fair weather is most likely to result from a(n) ________.

Which of the following is the least likely zone of formation for a large air mass? A. eastern Siberia B. the U.S. Midwest C. northern Sahara D. Caribbean Sea E. under an oceanic subtropical high

Which of the following occurs least over North America? Select one: A. Maritime Polar air from the North Atlantic B. Arctic air from Siberia C. Maritime Tropical air from the North Pacific D. Maritime Tropical air from the Pacific E. Maritime Polar air from the Gulf of Alaska

Of the air masses below, the coldest, driest ones are termed ________.

Of the list below, the coldest air is bound to be associated with a(n) ________ air mass.

When neither air mass displaces the adjacent one, their boundary is called a(n) ________ front.

Fronts are located ________.

________ have the most dynamic and changeable day-to-day weather on Earth.

Which front is shown on weather maps as a line with alternating semicircles and triangles on the same side of the line?

It can be said that along all the fronts in a middle latitude cyclone, ________.

In which frontal type is there no "aggressor" air mass?

A midlatitude anticyclone ________.

Which of the following is CLOSEST to the WIDTH of a front at Earth's surface? A. 100 meters B. 100 kilometers C. 10 meters D. 10 kilometers E. 1000 kilometers

On the average, ________ fronts move the fastest of all fronts.

On a weather map, a symbol consisting of triangles arranged along one side of a line indicates a(n) ________ front.

Which of the following probably is least indicative of a cold frontal passage two hours ago? A. an increase in stability B. a change in wind direction C. a change in wind speed D. an increase in temperature E. an increase in in humidity

Which type of front typically produces the fastest rise of air? A. warm B. cold C. dark D. occluded E. stationary

Which of the following is a normal slope for a warm front? Select one: A. 1:10 B. 1:50,000 C. 1:2,000 D. 1:400 E. 1:200

Which type of front causes many hours of steady rain BEFORE that front passes a location? Select one: A. cold B. warm C. dry line D. tropical E. stationary

In an occluded front, the warm air sector is ________.

The global westerly wind zone most heavily impacts the ________ latitudes.

A midlatitude cyclone is also properly termed ________.

An average air mass is on the order of ________ kilometers in diameter.

An occluded front forms part of which of the following? A. an extratropical cyclone B. a stationary front C. a dry line D. a cold front E. a warm front

Midlatitude cyclones and anticyclones function as migratory features in the ________.

Upper air divergence is most closely associated with surface ________.

Which of the following statements does NOT correctly describe the U.S. distribution of midlatitude cyclones? A. They form underneath areas of divergence. B. More occur in the summer than in the winter. C. They commonly form along the central Atlantic coast. D. Most of them exit the country through the Northeast. E. They commonly form downwind of the Rocky Mountains.

Most middle latitude cyclones occur ________.

A mature middle latitude cyclone takes on the shape of a ________.

In the Northern Hemisphere, a midlatitude cyclone has winds that circulate ________.

Stable anticyclones act as a ________ to moving cyclones.

Most midlatitude cyclones have ________ .

Which of the following best represents the length of the life cycle of a typical midlatitude cyclone? Select one: A. 1 hour B. 1 day C. 1 month D. 1 year E. 1 week

The warmest air can be found in the ________ air mass.

The movement (track along the ground) of middle latitude cyclones is determined by ________.

As a middle latitude cyclone goes through its life cycle, the warm sector ________.

At any given time, how many extratropical cyclones might one expect to be in existence in the Northern Hemisphere?

Which of the following can be said to be the "death" of a midlatitude cyclone? Select one: A. occurrence of intense precipitation B. occlusion C. expansion of the size of the warm sector D. the presence of strong temperature gradients across fronts E. cyclogenesis

The beginning of a middle latitude cyclone is known as ________.

Cyclogenesis occurs along the________.

Which of the following is most closely associated with midlatitude cyclones? A. zonal flow in the upper westerlies B. cloud-free skies C. stable air D. subsidence of air above the surface cyclone E. meridional flow in the upper westerlies

Midlatitude cyclones contain several well-defined channels of air called ________.

In the Conveyor Belt Model, the dry slot is ________.

Concerning midlatitude anticyclones, which of the following is FALSE? A. They are areas of high pressure. B. They do not contain fronts. C. They are larger than cyclones. D. They contain air mass conflict. E. They have light winds around their centers.

Which of the following air masses can be identified as being "very stable"? A. Equatorial B. Rocky Mountain C. Arctic D. Maritime polar E. Maritime tropical

Which is NOT true of BOTH midlatitude cyclones and midlatitude anticyclones? A. They cover many thousands of square kilometers. B. They sometimes have a functional relationship with each other. C. They contain subsiding air. D. They contain closed isobars. E. They have winds rotating around their centers.

In a midlatitude anticyclone, where are the strongest winds usually found?

The correct designation for a hurricane is as a(n) ________.

The part of the hurricane characterized by scattered high clouds and light winds is known as the ________.

The largest and strongest tropical cyclones are associated with the ________.

The "eye" of the hurricane is a zone characterized by ________.

Which of the following is NOT NECESSARILY a property of an air mass? A. It must modify as it leaves its source region. B. It must have a warm front at its leading edge. C. It must travel as a recognizable entity. D. It must be large. E. It must have relatively uniform properties within itself.

Which of the following rarely affects North America? A. continental tropical B. continental polar C. maritime tropical D. equatorial E. Arctic

The desert would be the obvious zone of origin of a(n) ________ air mass.

Which of the following is NOT an ideal air mass source region? Select one: A. the flat tundra surface of northern Canada B. the regions of the world which have stable air C. the Pacific ocean near the Gulf of Alaska D. the Rocky Mountains west of Denver E. the flat desert surface of the Sahara