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Clouds are classified and named according to their altitude and:


A) size of droplets in the cloud.
B) temperature.
C) form or appearance.
D) amount of precipitation produced.
E) water content.

F) A) and D)
G) C) and D)

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Freezing rain (ice storm) or sleet occurs when:


A) both surface and upper air are warm.
B) both surface and upper air are cold.
C) the air at the surface is very warm compared to the cloud.
D) there is a warm layer of air between the cloud and the cold surface.

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

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Who first created the cloud classification system on which our modern system is based?


A) Benjamin Franklin
B) Luke Howard
C) Andrew Ellis
D) Tor Bergeron

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

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Clouds and precipitation form in the air primarily due to:


A) absorption of infrared radiation.
B) release of latent heat.
C) excessive numbers of condensation nuclei.
D) air being cooled as it rises.
E) moisture being added to the air.

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

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A standard rain gauge magnifies rainfall ten times.

A) True
B) False

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The___________ cloud is confined to the middle height range.


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

F) B) and D)
G) A) and B)

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Nimbostratus clouds can produce long, steady periods of precipitation.

A) True
B) False

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The process of releasing silver iodide into the atmosphere to stimulate rainfall is called:


A) cloud seeding.
B) rain enhancement.
C) artificial droplet supplementation.
D) precipitation harvesting.

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

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The cloud form that is best described as sheets or layers that cover much or all of the sky is termed:


A) mackerel sky.
B) cirrus.
C) cumulus.
D) stratus.
E) alto.

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

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