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Exam 5: Condensation - Dew - Fog - and Clouds

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Question 41

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​Hail is usually associated with ____ clouds.

A) ​stratus
B) ​cumulus
C) ​stratocumulus
D) ​altocumulus
E) ​cumulonimbus

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Question 42

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​Which cloud type is composed of ice crystals and can cause a halo to form around the Sun or Moon?

A) ​altostratus
B) ​stratus
C) ​nimbostratus
D) ​cirrostratus
E) ​angelitus

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Question 43

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​A layer of dust or salt particles suspended above a region is called ____________________.

​Radiation fog typically forms on

​Nuclei with a radius of less than 0.1 µm are referred to as ____ nuclei.

​Explain how dew, frozen dew, and visible frost form.

​Water vapor cannot condense onto hygroscopic nuclei particles at relative humidities less than 100 percent.

​Fog is often described as a cloud that forms at ground level. In what ways are the formation of fog and clouds similar and different?

​Satellite images provide detailed information on cloud ____________________ and ____________________.

​Condensation nuclei may be made up of salt from the ocean.

​The cooling of the ground to produce dew is mainly the result of

​When a cloud forms over and extends downwind of an isolated mountain peak, it is called a ____ cloud.

​When temperatures are below freezing, the temperature to which air must be cooled in order for a phase change (from liquid to ice) to occur is called the

​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

​Because fog causes a lot of problems, such as accidents, scientists are seeking ways to disperse, or at least "thin" fog.

​These types of clouds make the Sun appear as a dimly visible round disk.

​Cirrus clouds are composed primarily of

​High cirriform clouds are composed almost entirely of ice crystals. In tropical regions, air temperatures low enough to freeze all liquid water usually occur only above 6000 m (about 20,000 ft). In polar regions, however, these same temperatures may be found at altitudes as low as 3000 m (about 10,000 ft). Hence, while you may observe cirrus clouds at 3600 m (about 12,000 ft) over northern Alaska, you will not see them at that elevation above southern Florida.

​In 1887, Ralph Abercromby and Hugo Hildebrandsson expanded Howard's original cloud classification system and published a classification system that, with only slight modification, is still in use today. In their system, ____ principal cloud forms are divided into ____ primary cloud groups.

Even at high elevations where cirrus clouds are found, liquid water still exists in the clouds.