Question 1

Discuss the factors that determine whether a cloud can have a cooling effect or a warming effect on the atmosphere.

Accepted Answer

The answer of Discuss the factors that determine whether a...

Question 2

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?

Accepted Answer

The answer of Fog is often described as a cloud...

Question 3

Which of the following describes a reasonably successful method of dispersing cold fog?

Accepted Answer

A) use the turboclair technique 
B) warm the air so that the fog evaporates 
C) seed the fog with dry ice 
D) mix the surface air with warmer air above

Question 4

Which of the following clouds form in descending air?

Accepted Answer

A) mammatus 
B) cumulus fractus 
C) cumulonimbus 
D) pileus

Question 5

Which of the following statements applies to satellite images taken of clouds at night?

Accepted Answer

A) They use reflected visible light. 
B) They use reflected infrared light. 
C) They use emitted infrared light. 
D) They use microwave radiation.

Question 6

In which of the following conditions does exhaled breath condense?

Accepted Answer

A) It is very warm and dry. 
B) The addition of water vapour from your breath causes the air's relative humidity to decrease 
C) It is very cold. 
D) The addition of water vapour from your breath causes the air's specific humidity to exceed 5g/kg.

Question 7

Advection fog is often observed along the Pacific coast during summer as westerly winds carry moist air toward the shore. Which of the following describes why this fog forms?

Accepted Answer

A) The surface water near the coast is slightly colder than the surface water farther offshore. 
B) The surface water near the coast is slightly warmer than the surface water farther offshore. 
C) The surface water near the coast is much warmer than the surface water farther offshore. 
D) The surface water near the coast is much colder than the surface water farther offshore.

Question 8

Which of the following cloud types is found at the highest elevation above the Earth's surface?

Accepted Answer

A) cumulus congestus 
B) noctilucent 
C) cumulonimbus 
D) cirrocumulus

Question 9

When radiation fog "burns off," in which direction does the fog tend to dissipate?

Accepted Answer

A) starting at the middle, and working laterally 
B) from the bottom up 
C) starting at the middle, and working both upward and downward 
D) from the top down

Question 10

Which of the following terms refers a towering cloud that has yet to develop into a thunderstorm?

Accepted Answer

A) cumulus congestus 
B) cumulonimbus 
C) altocumulus 
D) cumulus humilis

Question 11

Which of the following is the main type of fog that forms along the Pacific coastline of North America?

Accepted Answer

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

Question 12

-Which of the clouds sketched in the figure above can be referred to as a towering cumulus (cumulus congestus)?

Accepted Answer

A) cloud A 
B) cloud B 
C) cloud C 
D) cloud D

Question 13

Which of the following cloud types has the greatest vertical growth?

Accepted Answer

A) cirrocumulus 
B) cumulus humilis 
C) cumulus congestus 
D) cumulonimbus

Question 14

Which of the following terms refers to the cloud-like streamer that often forms behind an aircraft flying at high altitude?

Accepted Answer

A) mammatus 
B) banner 
C) contrail 
D) pileus

Question 15

Which of the following occurs when frost forms?

Accepted Answer

A) Frost forms through sublimation. 
B) The dew point is above 0ºC. 
C) Objects on the ground cool above the dew-point temperature. 
D) Water vapour changes into ice without first becoming a liquid.

Question 16

Which of the following expressions describes the dissipation of a fog layer?

Accepted Answer

A) "burn off" 
B) "radiation off" 
C) "layer off" 
D) "fog off"

Question 17

Which of the following types of fog is most likely formed when the wind is blowing from the east at Calgary, Alberta?

Accepted Answer

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

Question 18

A low, lumpy cloud layer that appears in rows, patches, or rounded masses is classified as which of the following cloud types?

Accepted Answer

A) stratocumulus 
B) stratus 
C) altocumulus 
D) nimbostratus

Question 19

Which of the following pairs of cloud types could be very similar in appearance?

Accepted Answer

A) cirrocumulus and cumulonimbus 
B) cirrostratus and stratus 
C) cumulus and cirrus 
D) altocumulus and cirrocumulus

Question 20

Which of the following processes causes salty potato chips left outside in an uncovered bowl to turn soggy on a humid day?

Accepted Answer

A) the attraction of water by hygroscopic condensation nuclei 
B) the repelling of water by hydrophobic condensation nuclei 
C) the attraction of water by hydrophobic condensation nuclei 
D) the repelling of water by hygroscopic condensation nuclei

Exam 5: Condensation: Dew, Fog, and Clouds