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A low, lumpy cloud layer that appears in rows, patches, or rounded masses would be classified:


Hail is usually associated with what cloud?


The cloud with the greatest vertical growth is:


As Apollo 12 ascended into the atmosphere, the height of the surrounding clouds was noted to be 42,000 feet. A lightning stroke was seen within these clouds, indicating that they must have been:


Which cloud forms in descending air?

Mammatus clouds

Which below is not a way in which a contrail may form?

due to heating of the air by the engine exhaust

The small, smooth cloud that may form just above the top of a towering cumulus cloud is called (a):

pileus cloud

The cloud-like streamer often seen forming behind an aircraft flying at high altitude is called (a):


Clouds that have a characteristic lens-shaped appearance are referred to as (a):

lenticular clouds

Clouds that appear as bag-like sacks hanging from beneath a cloud are:


An altocumulus in the form of parallel waves would be described as an altocumulus


Another name for a "mother of pearl" cloud is:

Nacreous clouds

"Luminous night clouds" are also called

noctilucent cloud

Which term below describes a situation in which clouds cover between one-tenth and five-tenths of the sky?


When clouds are viewed near the horizon, the individual cloud elements usually:

appear closer together than is actually the case

Which of the following can be used to determine the height of cloud bases?

ceiling balloons, rotating-beam ceilometer, fixed-beam ceilometer (all of the above)

If a pilot balloon rises at a rate of 100 m per minute, and if it disappears into a deck of stratus clouds 1,500 m (5,000 ft) thick in 5 minutes, what is the ceiling of the cloud layer?


Which of the following would provide the most accurate method of determining cloud base altitude?


Infrared and visible satellite images might provide

a way of determining cloud thickness and altitude

On an infrared satellite image, low, warm clouds appear ___ and high, cold clouds appear ___

dark; light

Infrared satellite images are computer enhanced to:

increase the contrast between specific features in the picture

Satellite images taken of clouds at night use:


If a cloud appears white on a visible satellite image and gray on an infrared image, then the cloud could be:

a low cloud

The TRMM (Tropical Rainfall Measuring Mission) satellite provides information on tropical:

rainfall, sea surface temperatures with a microwave scanner

names given to satellites

geostationary satellites, polar-orbiting satellites, TRIOS, GOES, TRMM

Geostationary satellites

has a geostationary orbit- a circular geosynchronous orbit directly above the earths equator. Remain permanently fixed in exactly the same position in the sky.

Satellites can:

observe clouds in earths orbit. Provides extremely valuable cloud photographs of areas where there are no ground-based observations.

Polar orbiting satellites:

closely parallel the earths meridian lines. Pass over the north and south polar regions on each revolution. Covers the entire earth

A rotating-beam ceilometer is useful for

estimating the altitude of the tops of vertical development clouds

Lenticular clouds typically form___a mountain range.


When temperatures are below freezing, the temperature to which air must be cooled in order for a phase change to occur is called the:

dew point

Dew, frozen dew, and frost form when the below-freezing layer of air is:

close to ground level

On humid days, salt in saltshakers sometimes becomes moist and no longer pours out easily. The salt can be described as:


Radiation fog typically forms on:

a clear winter night with a very slight breeze

In hilly areas, cold air typically collects:

in valleys

When fog is "burning off," the cloud droplets are preventing solar radiation from reaching the ground.


Stratus and high fog are:

a uniform grayish cloud that often cover the entire sky. Resembles fog that does not reach the ground. Might be confused with nimbostratus.

Advection fog is often observed along the Pacific coast during summer, as westerly winds carry moist air toward the shore. The fog forms because the surface water near the coast is ____then surface water farther offshore.

much colder

Suppose two ocean currents with different temperatures are flowing next to one another. If the wind blows perpendicular to the currents, we would expect to find:

advection fog

Upslope fog forms because air ___ as it flows up a hill or mountain range.


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