As air rises, it expands. It expands because it moves to
A) a region of higher air pressure.
B) a region of lower air pressure.
C) an area of greater humidity.
D) an area of cooler air temperature.
Question 2
Rising air expands and cools. If the air mass cools below its dew point temperature, the air mass
A) reaches 100 relative humidity, and water vapor evaporates.
B) reaches 100 relative humidity, and water vapor may condense to form clouds.
C) stops moving upward and relative humidity climbs to 100.
D) continues to cool at the environmental lapse rate.
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One pathway of primary succession in Alaska’s Glacier Bay region.