WX 201 EXAM 2, ERAU UPDATED ACTUAL QUESTIONS AND CORRECT ANSWERS

WX 201 EXAM 2, ERAU UPDATED ACTUAL QUESTIONS
AND CORRECT ANSWERS

Question:
1. curvature effect
Answer:
as cloud droplets decrease in size, they exhibit a greater surface curvature that causes a more rapid rate of
evaporation

Question:
2. solute effect
Answer:
the dissolving of hygroscopic particles, such as salt, in pure water, thus reducing the relative humidity
required for the onset of condensation

Question:
3. collision coalescence process
Answer:
the process of producing precipitation by liquid particles colliding and joining

Question:
4. ice crystal (bergeron) process
Answer:
A process that produces precipitation. The process involves tiny ice crystals in a supercooled cloud
growing larger at the expense of the surrounding liquid droplets.

Question:
5. aggregation
Answer:
The clustering together of ice crystals to form snowflakes.

Question:
6. rain
Answer:
liquid precipitation

Question:
7. drizzle
Answer:
light rain

Question:
8. virga
Answer:
precipitation that falls from a cloud but evaporates before reaching the ground

, Question:
9. snow
Answer:
precipitation falling from clouds in the form of ice crystals, water vapor freezes

Question:
10. sleet
Answer:
A type of precipitation consisting of transparent pellets of ice 5 mm or less in diameter. Same as ice
pellets.

Question:
11. freezing rain
Answer:
develops when warm oceanic air rises up and over the cold air, producing liquid precipitation that falls
through the cold layer

Question:
12. how does hail form
Answer:
when raindrops are carried upward by thunderstorm updrafts into extremely cold areas of the atmosphere
and freeze

Question:
13. which type of cloud produces hail
Answer:
cumulonimbus

Question:
14. which cloud formation process is more common in the tropics
Answer:
heavy rain and severe weather

Question:
15. a horizontal pressure difference...
Answer:
causes a horizontal pressure difference aloft. The isobars tilt, being higher in the warm air. Because the tilt
increases with height, the horizontal PGF increases with height. The geostrophic winds increase with
height.

Question:
16. the units of measurement used to describe pressure
Answer:
hectopascal

Question:
17. barometer measures