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EL 100 quiz 3

QuestionAnswer
Desertification The formation and expansion of degraded areas of soil and vegetation cover in arid, semiarid, and seasonally dry areas, caused by climatic variation and human activities.
Humus A dark brown or black, spongy residue of organic matter that remains after the bulk of dead leaves, wood, or other organic matter has decomposed. It is extremely valuable in enhancing the physical and chemical properties of soil
Saltwater intrusion the phenomenon of seawater’s moving back into aquifers or estuaries.
irrigation artificially adding water to crops.
condensation The collecting of molecules from the vapor state to form the liquid state.
aquifer An underground layer of porous rock, sand, or other material that allows the movement of water between layers of nonporous rock and clay.
Created by: mikeparsell
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