1 .		A lapse rate is a change of ___________ with height.
2 .		Suppose an air mass warms as it moves over a land surface, but no water vapor is added or lost. The relative humidity will ___________ while the specific humidty will ____________.
3 .		The Peru Current is a cold ocean current off the west coast of South America. If a warm, moist air mass passed over this current, ____________ might result.
4 .		____________ is most likely when the environmental lapse rate is large (for example, 12 degrees C/km).
5 .		Descending air always warms at the _____________.
6 .		The ____________ is the ratio of the actual amount of water vapor in the atmosphere to the maximum amount of water possible at that temperature.
7 .		Air that returns to its original position after an initial vertical displacement is called __________.
8 .		A(n) _________ is an aggregation of tiny moisture droplets and ice crystals suspended in the air.
9 .		Clouds are usually classified on the basis of __________ and __________.
10 .		Clouds that are flat and layered are in the general group called __________.
11 .		The __________ process is the predominant cloud-forming process in the tropics, where clouds form above freezing temperatures.
12 .		The foggiest region of the United States is the ___________.
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