What is a perched water table, and what causes it?
A perched water table is an accumulation of groundwater above an aquiclude that lies above the regional water table. It can occur where a shallow aquiclude is present above an aquifer containing the zone of saturation. Local infiltration is prevented from reaching the regional water table, pooling instead above the shallow aquiclude.
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In middle latitudes, which of the following cloud types has the highest base?
A. cumulonimbus B. cirrostratus C. cumulus D. altostratus
Dry air is 78.08% nitrogen, 20.95% oxygen and 0.93% argon with the 0.04% being other gases. If the atmospheric pressure is 760.0 torr, what is the partial pressure of nitrogen in dry air?
A) 78.08 torr B) 166.6 torr C) 593.4 torr D) 760.0 torr
The zonation of flora and fauna along an altitudinal transect similar to that found along latitudinal transects is an expression of the
A) altitudinal zonation principle. B) vegetation similarity theory. C) altitude-latitude hypothesis. D) life zone concept.
Alcohol and pickling solutions were probably widely developed because they
A. Have more interesting flavors than other solutions for seasoning B. Are effective insecticides in the home C. Preserve food due to their pesticidal properties D. Neutralize toxins in foods E. All of these are good reasons why alcohol and pickling solutions were used