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h. (1) The air currents rise.

(2) The air currents produce the rounded tops of cumulus clouds.
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i. (1) The warm air mass advances.

(2) The warm air mass slides over the wedge of cold air.
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j. (1) The warm front air rises and cools.
(2) The warm front air forms cirrus clouds up to 500 miles in advance of the front.

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k. (1) The wing tip vortices counter-rotate.
(2) The wing tip vortices extend to the rear of the aircraft.

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l. (1) The aircraft land and depart.
(2) The aircraft may experience temperature inversion wind shear.

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