FAA KNOWLEDGE TEST WEATHER QUESTIONS BASIC …

FAA KNOWLEDGE TEST WEATHER QUESTIONS . BASIC WEATHER THEORY. Earth's atmosphere is composed of;. 1. 78% Nitrogen, 21% Oxygen, 1% other gases 2. 21% Nitrgon, 1% oxygen, 78% other gases 3. Even % of Nitrogen, Oxygen, and Carbon Dioxide Name 1 other gas in atmosphere [Argon, Co2]. Water vapor accounts for what percentage of the total volume [0-5%]. Four layers of atmosphere 1. Troposphere 2. Stratosphere 3. Mesosphere 4. Thermosphere The movement of air around the surface of the Erath is known as [atmospheric circulation]. Every physical process of WEATHER is accompanied by, or is the result of, a 1. movement of air. 2. pressure differential 3. heat exchange. Simple convection model for heating Earths surface is . [Earth is warmed by energy radiation form the sun causes circular vertical motion ( warm air is replaced by cooler air]]. Why does warm air rise and cool air decend ? [warm expands and less dense and lighter than surrounding air.)

3. Evaporation and sublimation. Which conditions result in the formation of frost? 1. The temperature of the collecting surface is at or below the dewpoint of the adjacent air and the dewpoint is below freezing. 2. The temperature of the surrounding air is at or below freezing when small drops of moisture fall on the collecting surface. 3.

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