The weather associated with a Low can be significantly different than that of a High. The differing vertical motions account for
some of these differences. Vertical motions lead to temperature changes in the rising or sinking air. The temperature changes occur because air warms when it is compressed and cools when it expands. In the open atmosphere, air pressure is less at increasing altitudes. Consequently, air expands and cools when ___________. Air is compressed and warms when ___________. A. ascending, descending
B. descending, ascending
C. ascending, ascending
D. descending, descending
In a High, air shows descending motion. The sinking air experiences (increasing, decreasing) atmospheric pressure. Therefore, the descending air (expands is compressed) and its temperature (increases,decreases)
In a Low, air exhibits ascending motion. rising air experiences (increasing, decreasing atmospheric pressure. The ascending air (expands, compressed) and its temperature (increases,decreases)
