Chapter 7 physical geography

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

midlatitude anticyclone

Which of the following is the least likely zone of formation for a large air mass?

the US midwest

Which of the following occurs least over North America?

Maritime Polar air from the North Atlantic

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

continental polar

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

cP

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

stationary

Fronts are located __________________.

at the edges of air masses

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

latitudes affected by fronts

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

occluded front

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

air rises

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

stationary

A midlatitude anticyclone ________________.

is associated with sunny, dry weather

Which of the following is closest to the width of a front at earth's surface?

10 km

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

cold

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

cold

Which of the following probably is least indicative of a cold frontal passage two hours ago?

an increases in temperature

Which type of front typically produces the fastest rise of air?

cold

Which of the following is a normal slope from a warm front?

1:400

Which type of front causes many hours of steady rain before that front passes a location?

warm

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

above the ground

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

middle

A midlatitude cyclone is also properly termed _____________.

a wave cyclone

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

1,600

An occluded front forms part of which of the following?

an extratropical cyclone

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

westerlies

Upper air divergence is most closely associated with surface ______________________.

cyclones

Which of the following statements does NOT correctly describe the U.S. distribution of midlatitude cyclones?

more occur in the summer than in the winter

Most middle latitude cyclones occur ______________.

downstream of an upper level pressure trough

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

wave

In the Northern Hemispere, a midlatitude cyclone has winds that circulate _______________.

counterclockwise while converging

Stable anticyclones act as a ______________ to moving cyclones.

block

Most midlatitude cyclones have __________________.

paths determined by the upper flow

Which of the following best represents the length of the life cycle of a tropical midlatitude cyclone?

1 week

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

cT

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

the jet stream

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

gets smaller

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

6 to 15

Which of the following can be said to be the "death" of a midlatitude cyclone?

occlusion

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

cyclogenesis

Cyclogenesis occur along the _________________.

polar front

Which of the following is most closely associated with midlatitude cyclones?

meridional flow in the upper westerlies

Midlatitude cylones contain several well-defined channels of air called _______________.

the conveyor belt

In the Conveyor Belt model, the dry slot is ______________.

bringing descending air into the cyclone

Concerning midlatitude anticyclones, which of the following is FALSE?

They contain air mass conflict.

Which of the following air masses can be identified as being very stable?

Artic

Which is NOT true of BOTH midlatitude cyclones and midlatitude anticyclones?

They contain subsiding air.

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

near the eastern edge

The correct designation for a huricane is as a(n) __________________________.

tropical cyclone

atahe oart of the hurricane charactereized by scattered high clouds and light winds is known as the _________________.

eye

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

China Sea

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

sinking air

Which of the following is NOT NECESSARILY a property of an air mass?

It must have a warm front at its leading edge.

Which of the following rarely affects North America?

equatorial

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

cT

Which of the following is NOT an ideal air mass source region?

the Rocky Mountains west of Denver