Which of the following sets of conditions would produce a cumulus cloud with the lowest base?
a. air temperature 90F, dew point temperature 50F
b. air temperature 90F, dew point temperature 40F
c. air temperature 90F, dew point temperature 60F
d. air temperature 90F, dew point temperature 20F
e. air temperature 90F, dew point temperature 10F
Question 2If rising air cools to its dew-point temperature, the relative humidity becomes ____.
a. 20
b. 40
c. 60
d. 80
e. 100
Question 3Just above cumulus clouds, you would expect to find
a. a stable layer.
b. an unstable layer.
c. a conditionally unstable layer.
d. unusually strong horizontal winds.
e. convective instability.
Question 4Which cloud type below would most likely form in an unstable atmosphere?
a. cumulonimbus
b. stratus
c. cirrostratus
d. nimbostratus
e. cumulus humilis
Question 5If an air parcel is given a small push upward and it continues to move upward on its own accord, the atmosphere is said to be
dynamic.
a. stable.
b. unstable.
c. buoyant.
d. dynamic.
e. supersaturated.
Question 6In a conditionally unstable atmosphere, the environmental lapse rate will be ____ the moist adiabatic rate and ____ the dry adiabatic rate.
a. greater than; less than
b. greater than; greater than
c. less than; greater than
d. less than; less than
e. the same as; the same as
Question 7Which environmental lapse rate represents the most unstable atmosphere in a layer of unsaturated air?
a. 1C per 1,000 m
b. 3C per 1,000 m
c. 6C per 1,000 m
d. 9C per 1,000 m
e. 11C per 1,000 m
Question 8Which condition would be described as the most stable?
a. environmental lapse rate is 13C per kilometer
b. environmental lapse rate is 3C per kilometer
c. isothermal conditions
d. an inversion
e. superadiabatic conditions
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