Question 1

Water vapor cannot condense onto hygroscopic nuclei particles at a relative humidity less than 100 percent.

Accepted Answer

A) True 
 B)False

Question 2

List the main types of fog, and then briefly explain how each one forms. Where might you expect each of these different types of fog to form?

Accepted Answer

The answer of List the main types of fog, and...

Question 3

The scattering effect of dry haze produces a ____ color when viewed against a dark background and a ____ tint when viewed against a light-colored background.

Accepted Answer

A) yellowish; bluish 
B) bluish; yellowish 
C) reddish; yellowish 
D) yellowish; reddish 
E) whitish; silvery

Question 4

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

Accepted Answer

A) True 
 B)False

Question 5

If fog is forming in Denver, Colorado (located on the eastern side of the Rocky Mountains), and the wind is blowing from the east, then the fog is most likely ____.

Accepted Answer

A) advection fog 
B) frontal fog 
C) upslope fog 
D) radiation fog 
E) downslope fog

Question 6

In the United States, the frequency of days with dense fog is very low in places like Utah, Arizona, and Montana.

Accepted Answer

A) True 
 B)False

Question 7

Suppose the sky is covered with stratus clouds. How might you determine whether middle or high clouds are also present?

Accepted Answer

The answer of Suppose the sky is covered with stratus...

Question 8

Explain why clouds form in rising air.

Accepted Answer

The answer of Explain why clouds form in rising air....

Question 9

What kinds of information about clouds could you hope to determine using infrared and visible satellite photographs?

Accepted Answer

The answer of What kinds of information about clouds could...

Question 10

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

Accepted Answer

A) Altocumulus 
B) Cirrostratus 
C) Altostratus 
D) Cirrocumulus 
E) Cirrus

Question 11

Particles that serve as surfaces on which water vapor may condense are called ____.

Accepted Answer

A) hydrophobic nuclei 
B) nacreous nuclei 
C) condensation nuclei 
D) scud 
E) molecules

Question 12

Radiation fog forms best on a ____.

Accepted Answer

A) clear winter night with a slight breeze 
B) cloudy winter night with a strong breeze 
C) clear summer night with a strong breeze 
D) cloudy summer night with a slight breeze 
E) cloudy winter night with a slight breeze

Question 13

Frost forms when the dew point temperature is at or below freezing.

Accepted Answer

A) True 
 B)False

Question 14

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 6,000 m (about 20,000 feet). In polar regions, however, these same temperatures may be found at altitudes as low as 3,000 m (about 10,000 feet). Hence, while you may observe cirrus clouds at 3,600 m (about 12,000 feet)over northern Alaska, you will not see them at that elevation above southern Florida.

Accepted Answer

A) True 
 B)False

Question 15

To a weather forecaster a clear sky is one where no clouds are present. When there are between ____ and ____ clouds covering the sky, there are a few clouds present.

Accepted Answer

A) one-eighth; two-eighths 
B) two-eighths; three-eighths 
C) three-eighths; four-eighths 
D) four-eighths; five-eighths 
E) five-eighths; six-eighths

Question 16

Distinguish among dry haze, wet haze, and fog.

Accepted Answer

The answer of Distinguish among dry haze, wet haze, and...

Question 17

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 ____.

Accepted Answer

A) wet bulb 
B) dew point 
C) frost point 
D) heat index 
E) frost index

Question 18

In 1802, the French naturalist ____________________ proposed the first system for classifying clouds.

Accepted Answer

The answer of In 1802, the French naturalist ____________________ proposed...

Question 19

Clouds are classified by their ____.

Accepted Answer

A) appearance 
B) altitude 
C) method of formation 
D) temperature 
E) altitude and appearance

Question 20

Mammatus clouds most frequently form on the underside of ____ clouds.

Accepted Answer

A) cumuloaltus 
B) stratus 
C) cirrus 
D) nimbostratus 
E) cumulonimbus

Exam 5: Condensation: Dew, Fog, and Clouds

Water vapor cannot condense onto hygroscopic nuclei particles at a relative humidity less than 100 percent.

List the main types of fog, and then briefly explain how each one forms. Where might you expect each of these different types of fog to form?

The scattering effect of dry haze produces a color when viewed against a dark background and a tint when viewed against a light-colored background.

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

If fog is forming in Denver, Colorado (located on the eastern side of the Rocky Mountains) , and the wind is blowing from the east, then the fog is most likely ____.

In the United States, the frequency of days with dense fog is very low in places like Utah, Arizona, and Montana.

Suppose the sky is covered with stratus clouds. How might you determine whether middle or high clouds are also present?

Explain why clouds form in rising air.

What kinds of information about clouds could you hope to determine using infrared and visible satellite photographs?

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

Particles that serve as surfaces on which water vapor may condense are called ____.

Radiation fog forms best on a ____.

Frost forms when the dew point temperature is at or below freezing.

To a weather forecaster a clear sky is one where no clouds are present. When there are between and clouds covering the sky, there are a few clouds present.

Distinguish among dry haze, wet haze, and fog.

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 ____.

In 1802, the French naturalist ____________________ proposed the first system for classifying clouds.

Clouds are classified by their ____.

Mammatus clouds most frequently form on the underside of ____ clouds.