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Clouds are named by their height and water content.

A) True
B) False

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Where are lenticular clouds most likely to form?


A) to the lee of mountains
B) over oceans
C) along coastlines
D) in desert regions

E) All of the above
F) C) and D)

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A(n) ________is a low layer of dark gray clouds that produces precipitation.


A) cirrus
B) nimbostratus
C) cirrostratus
D) altostratus
E) cumulonimbus

F) A) and B)
G) A) and C)

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The necessary conditions for hail formation include strong upward vertical motion and:


A) raindrops larger than 5 mm.
B) large numbers of particulates.
C) large numbers of supercooled droplets.
D) warm temperatures at high levels in the cloud.

E) None of the above
F) C) and D)

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Raindrops form by condensation.

A) True
B) False

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Pure water suspended in the atmosphere will freeze at a temperature of:


A) 32°F
B) 0°C
C) - 40°C
D) - 10°C

E) B) and D)
F) All of the above

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Freezing rain and sleet are both the same form of precipitation.

A) True
B) False

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Water condensation can occur even if the air is not completely saturated.

A) True
B) False

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List the advantages and disadvantages of using a standard rain gauge vs. weather radar to measure precipitation.

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Standard rain gauge: Highly accurate mea...

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Under what conditions does light and fluffy snow form?


A) warm air and low humidity
B) cold air and no humidity
C) cold air and low humidity
D) warm air and high humidity

E) A) and B)
F) B) and C)

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Dew point is the temperature at which water vapor in the air begins to condense. The temperature inside a cloud would therefore be:


A) just above the dew point.
B) below freezing.
C) way above the dew point.
D) about equal to the dew point.

E) B) and D)
F) A) and B)

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D

High clouds are those that form at altitudes of at least:


A) 6500 ft (2000 m) .
B) 65,617 ft (20,000 m) .
C) 32,800 ft (10,000 m) .
D) 20,000 ft (6000 m) .

E) B) and C)
F) A) and D)

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The Bergeron process causes cloud droplets to grow because:


A) water freezes instantly when its temperature reaches 0°C.
B) freezing nuclei are much more common in the atmosphere than other condensation nuclei.
C) the saturation vapor pressure is lower near ice crystals than it is near supercooled droplets.
D) larger drops fall and collect smaller droplets in the cloud.

E) A) and B)
F) None of the above

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The process by which a cloud droplet first forms is:


A) supercooling.
B) evaporation.
C) precipitation.
D) collision and coalescence.
E) condensation.

F) B) and E)
G) B) and D)

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A radiation fog requires which of the following in order to form?


A) high relative humidity and clear nighttime skies
B) warm air moving over a cold surface
C) a warm body of water and a cold breeze
D) cold air moving up a slope

E) A) and D)
F) B) and C)

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The most effective cloud condensation nuclei are water absorbent, known as nuclei.

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hygroscopic

Frost is an example of _____ .

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When warm moist air moves over a cold surface, _________ fog may result.


A) steam
B) advection
C) upslope
D) precipitation
E) radiation

F) A) and E)
G) B) and E)

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B

It is difficult to distinguish between cloud droplets and raindrops on a radar image, because the radar wavelengths are reflected by both of them.

A) True
B) False

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Hail is most commonly associated with:


A) nimbostratus clouds.
B) cirrocumulus clouds.
C) cirrus clouds.
D) altostratus clouds.
E) cumulonimbus clouds.

F) C) and D)
G) B) and E)

Correct Answer

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