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_______ cannot be an indication to the passage of a frontal syst

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When the A/C flies from one airmass into another, an airmass wit

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The boundary between airmasses is called a _______ .

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An air mass is a body of air that _______ .

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A high cloud is composed mostly of _______ .

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Low clouds usually consist almost entirely of _______ .

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Fair weather cumulus clouds often indicate _______ .

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The _______ is a large body of air with fairly uniform temperatu

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Turbulence will occur when aircraft in flight encounter _______.

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_______ clouds indicate a fairly deep layer of unstable air. The

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