21.
The stability of an air layer refers to its
A
albedo
B
average temperature
C
pressure as measured at its base
D
tendency to either sustain or suppress vertical motions
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The stability of an air layer refers to its
albedo
average temperature
pressure as measured at its base
tendency to either sustain or suppress vertical motions
The process by which a cloud droplet first forms is
condensation
evaporation
precipitation
collision and coalescence
The most important process of cloud formation in the atmosphere is:
cooling by compression of air
cooling by release of latent heat of vaporization
cooling by expansion of air
radiation cooling
The most common way for air to be cooled in order that a cloud may form is by
emitting radiation
rising and expanding
sinking and contracting
reflecting radiation
The lifting of air and the resulting formation of clouds and rain is more gentle (gradual) for a
warm front
cold front
mesocyclone
occluded front
The initial detection and monitoring of tropical storms that may become hurricanes is accomplished by
satellites
ocean buoys
aircraft
ocean ships
The important difference between liquid droplets and ice crystals in a supercooled cloud is that ice crystals
are more pure
are smaller
increase the water vapor content of the cloud
grow much more rapidly
The heat released when water vapor condenses to form a cloud or when liquid droplets freeze in a cloud
makes the air heavier
cools off the cloud
evaporates more water
helps the cloud to rise higher
The gust front occurs
on the lee shore of the Great Lakes
near the anvil part of a thunderstorm cloud
during the development of thunderstorm clouds
at the leading edge of a thunderstorm downdraft
The formation of tornadoes is associated with:
severe thunderstorms
cold fronts
middle-latitude cyclones
all of the above
The development of major winter storms in the midwest depends strongly on
wind speed near the surface
wind speed aloft
amount of snow already on the ground
air mass contrasts
The cloud droplets in a cloud are formed by water vapor molecules and
molecules of air
other water vapor molecules
hygroscopoic nuclei
protons
The buoyancy of a rising air parcel is greatly affected by
wind speed
air pressure
heat released if water vapor condenses
absorption of solar radiation
The approximate lifetime of a wave cyclone is
a month
10 - 24 hours
1 - 2 days
a few days to a week
The air masses that have the greatest influence on weather conditions in the Midwestern United States are:
cP and mT
mP and cP
cT and cP
mP and mT
The air mass type most likely to form thunderstorms is
mT
mP
cT
cA
Since detection and tracking of hurricanes is now quite accurate, why does damage from these storms continue to increase?
poor forecasts of landfall area
hurricane intensity is greater
changes in tidal patterns
continued development of coastal areas
Over the last 20 years, which of these has caused the fewest weather related deaths in the U.S.?
lightning
floods
tornadoes
hurricanes
On a weather map,..................fronts are shown with triangular points on one side of the front and semicircles on the other.
warm
cold
occluded
stationary
Inside of a cloud, how do the air temperature and the dew point compare to one another?
they are equal
air temperature exceeds dew point
dew point exceeds air temperature
there is no consistent relationship