Weather Formation
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each of the black spaces below before clicking
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| What are the characteristics of stable air? | Poor visibility and steady precipitation.
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| A weather report indicates you can expect a low-level temperature inversion with high relative humidity. What weather conditions would you expect? | Smooth air, poor visibility, fog, haze, or low clouds.
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| The average lapse rate in the troposphere is | 2.0°C per 1,000 feet.
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| What is meant by the term "dewpoint"? | The temperature to which air must be cooled to become saturated.
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| The passage of which type of front poses the highest risk to small UA operations? | Cold front
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| In what part of the atmosphere does most weather occur? | Troposphere.
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| The suffix "nimbus," used in naming clouds, means | a rain cloud.
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| Steady precipitation preceding a front is an indication of | stratiform clouds with little or no turbulence.
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| When there is a temperature inversion, you would expect to experience | An increase in temperature as altitude is increased.
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| What would decrease the stability of an air mass? | Warming from below.
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| What is the primary cause of all changes in the Earth's weather? | variation of solar energy received by the Earth's regions.
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| One weather phenomenon which will always occur when flying across a front is a change in the | wind direction.
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| What causes variations in altimeter settings between weather reporting points? | Unequal heating of the Earth's surface
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| What are the characteristics of an unstable atmosphere? | What are the characteristics of an unstable atmosphere?
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| At approximately what altitude above the surface would you expect the base of cumuliform clouds if the surface air temperature is 77°F and the dewpoint is 53°F? | 5,500 feet AGL.
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| Which weather conditions should be expected beneath a low-level temperature inversion layer when the relative humidity is high? | Smooth air, poor visibility, fog, haze, or low clouds.
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| What measurement can be used to determine the stability of the atmosphere? | Actual lapse rate.
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| Clouds, fog, or dew will always form when | water vapor condenses.
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| The ratio of the existing water vapor in the air, as compared to the maximum amount that could exist at a given temperature, is called | relative humidity.
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| What are characteristics of a moist, unstable air mass? | Turbulence and showery precipitation.
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| Every physical process of weather is accompanied by, or is the result of | heat exchange.
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| A characteristic you would expect to see with a stable air mass is | poor surface visibility.
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| Which will produce the least favorable conditions for the operation of a small UA? | Warm, moist air.
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| At approximately what altitude above the surface would you expect the base of cumuliform clouds if the surface air temperature is 33°C and the dewpoint is 15°C? | 7,200 feet AGL.
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| One of the most easily recognized discontinuities across a front is | a change in temperature.
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| Some of the characteristics you would expect to see with an unstable air mass are | turbulence and good surface visibility
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| If the temperature/dewpoint spread is small and decreasing, and the temperature is 62° F, what type weather is most likely to develop? | Fog or low clouds.
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| Which clouds have the greatest turbulence? | Cumulonimbus
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| The boundary between two different air masses is referred to as a | front
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Created by:
Azxaviern