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30 Cards in this Set
- Front
- Back
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Which below best describes the solute effect?
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water droplets dissolve hygroscopic nuclei and condensation can occur at relativehumidities less than 100 percent
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Condensation onto hygroscopic nuclei is possible at relative humidities less than 100 percent due to the
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solute effect.
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Which of the following is NOT an important factor in the production of rain by the collision-coalescenceprocess? |
cloud thickness
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If you observe large raindrops hitting the ground, you could probably say that the cloud overhead was ____and had ____ updrafts. |
thick, strong |
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If rain falls on one side of a street and not on the other side, the rain most likely fell from a |
cumulonimbus cloud. |
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Which of the following statements is NOT correct? |
Ice nuclei are more plentiful in the atmosphere than condensation nuclei. |
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Ice nuclei may be |
a. ice crystals.b. certain clay minerals.c. bacteria in decaying plant leaf material.d. all of the above |
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At the same sub-freezing temperature, the saturation vapor pressure just above a liquid water surface is ____the saturation vapor pressure above an ice surface. |
greater than
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Contact nucleation is |
the freezing of supercooled droplets by contact with a nucleus.
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The growth of a precipitation particle by the collision of an ice crystal (or snowflake) with a supercooled liquiddroplet is called |
accretion.
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Cloud seeding using silver iodide only works in |
cold clouds composed of ice crystals and supercooled droplets
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What are the two main substances used in cloud seeding? |
silver iodide, dry ice
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After a rainstorm, visibility typically |
improves.
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Rain which falls from a cloud but evaporates before reaching the ground is referred to as |
virga.
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Which below best describes why a fluffy covering of snow is able to protect sensitive plants and their rootsystems from damaging low temperatures? |
Snow is a good insulator
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Large, heavy snowflakes are associated with |
moist air and temperatures near freezing.
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A true blizzard is characterized by |
a. low temperatures.b. strong winds.c. reduced visibility.d. blowing snow.e. all of these
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The largest snowflakes would probably be observed in ____ air whose temperature is ____ freezing. |
moist, near
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In order for falling snowflakes to survive in air with temperatures much above freezing, the air must be ____and the wet bulb temperature must be ____. |
unsaturated, at or below freezing
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In the winter you read in the newspaper that a large section of the Midwest is without power due to downedpower lines. Which form of precipitation would most likely produce this situation? |
freezing rain
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Which of the following might be mistaken for hail? |
graupel
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The primary method used in preventing the growth of large, destructive hailstones is to inject a thunderstormwith large quantities of |
silver iodide.
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An amount of precipitation measured to be less than one hundredth of an inch (0.25 mm) is called |
a trace.
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On average, the water equivalent of 10 inches of snow is about ____ inches of water. |
1 |
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In a typical advancing winter storm, which of the following sequences of precipitation types is most likely tooccur? |
rain, freezing rain, sleet, snow
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The main difference between a cloud drop and a raindrop is its |
size |
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A typical raindrop is about ____ than a typical cloud droplet. |
one hundred times larger
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Saturation vapor pressure ____ as temperature increases. |
increases
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Large cloud droplets fall faster than small cloud droplets because |
the ratio of the drop's surface area to its weight is smaller.
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Satellites measure rainfall from space using which instrument? |
radar
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