Identify and Discuss the Characteristic That Defines a Desert

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The Answer is Deserts are defined by their aridity, or dryness. There are two guidelines that define a region as being dry enough to be a desert. The region must receive less than 25 centimeters (10 inches) of precipitation annually. The second guideline is more useful, and identifies deserts by means of an aridity index, that is, a ratio of a region's potential annual evaporation to its recorded average annual precipitation. An area is considered a desert if its aridity index is greater than 4.0, which means that its potential evaporation is at least four times greater than the average annual precipitation.

Identify and Discuss the Characteristic That Defines a Desert

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Identify and Discuss the Characteristic That Defines a Desert

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Correct Answer:
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