Which of the following best describes a cloud?
A) Uniform featureless smoke lighter than the force of gravity.
B) Suspended raindrops that have not yet fallen under the force of gravity.
C) Semi-ordered condensation nuclei and ice crystals.
D) Aggregated condensation nuclei.
E) A visible aggregation of tiny moisture droplets and ice crystals suspended in the air.
Question 2
Which of the following is true regarding cloud condensation nuclei?
A) Maritime air masses average about a billion nuclei per cubic meter.
B) Continental air masses contain more condensation nuclei than maritime air masses.
C) Maritime air masses generally possess more nuclei than continental air masses.
D) Condensation nuclei are rare in urban environments.
E) The difference between maritime and continental locations. is not discernible.
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