Question Set 10 Flashcards
The typical raindrop has a diameter that is approximately
a) 0.02 mm.
b) 0.2 mm.
c) 2 mm.
d) 20 mm.
c) 2 mm.
The typical raindrop has a diameter that is approximately _____ times bigger than the
typical cloud droplet.
a) 1
b) 10
c) 100
d) 1000
c) 100
liquid water drops occurring at temperatures less than 0oC are called
a) supercooled liquid droplets.
b) hyperchilled liquid droplets.
c) dendritic liquid droplets.
d) Liquid water cannot occur at temperatures less than 0oC
a) supercooled liquid droplets.
Cloud particles at air temperatures around -20oC would likely be
a) a mixture of supercooled liquid droplets and ice particles.
b) all ice particles.
c) all supercooled liquid droplets.
d) turning into graupel particles.
a) a mixture of supercooled liquid droplets and ice particles.
Cloud particles at air temperatures around -50oC would likely be
a) a mixture of supercooled liquid droplets and ice particles.
b) all ice particles.
c) all supercooled liquid droplets.
d) turning into graupel particles.
b) all ice particles.
When larger liquid cloud droplets collect smaller liquid cloud droplets forming precipitation sized droplets the ___________ process is occurring.
a) collision-coalescence
b) ice-crystal (Bergeron-Findeisen)
c) accretion
d) aggregation
a) collision-coalescence
Why are there differing droplet sizes in a cloud?
a) The cloud condensation nuclei vary in size.
b) Random collisions of smaller droplets produce larger droplets.
c) Water vapor varies within the cloud.
d) All of the above.
d) All of the above.
Ice particles in the atmosphere can get bigger through
a) the ice-crystal (Bergeron-Findeisen) process.
b) accretion.
c) aggregation.
d) All of the above.
d) All of the above.
The most important reason for ice crystals growing at the expense of supercooled liquid water droplets during the ice-crystal process is
a) freezing nuclei are present in the atmosphere.
b) deposition nuclei are present in the atmosphere.
c) the difference in the saturation vapor pressures with respect to supercooled liquid water and with respect to ice at a given temperature.
d) None of the above.
c) the difference in the saturation vapor pressures with respect to supercooled liquid water and with respect to ice at a given temperature.
Which of these can also be referred to as the “cold cloud” process?
a) The collision-coalescence process
b) The ice-crystal (Bergeron-Findeisen) process
c) Accretion
d) Aggregation
b) The ice-crystal (Bergeron-Findeisen) process
The process known as _______ occurs when ice crystals collide with other ice crystals forming bigger ice crystals.
a) sublimation
b) deposition
c) accretion
d) aggregation
d) aggregation
The most important factor in determining the shape of an ice crystal that forms in the atmosphere is the __________ where the crystal is forming.
a) temperature
b) dew point temperature
c) relative humidity
d) pressure
a) temperature
_________ is an example of frozen precipitation (i.e., it falls from the sky already frozen).
a) freezing rain
b) freezing drizzle
c) hail
d) All of the above.
c) hail
A key factor in the formation of hail is the _______ that occur(s) with a thunderstorm.
a) strong surface winds
b) strong upward motion
c) heavy precipitation
d) All of the above.
b) strong upward motion
Which of the following statements concerning the shape of a raindrop is true?
a) They look like teardrops.
b) They are spherical.
c) They look like hamburger buns.
d) b) or c) but NOT a)!
d) b) or c) but NOT a)!
