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QR Challenge: ch. 20

Question	Answer
the process by which water is brought to an area for use on crops is called: desalination, purification, irrigation, sedimentation	irrigation
The largest consumer of water in the United States is: agriculture, industry, urban centers, residential areas	agriculture
In the home, most water is used for: cooking, drinking, personal hygiene, washing dishes	personal hygiene
Water that is fit for use as drinking water is said to be: polluted, runoff, contaiminated, potable	potable
The type of irrigation that makes use of sprinkler systems is: flood irrigation, drip or trickel irrigation, furrow irrigation, overhead irrigation	overhead
The most wasteful and inefficient type of irrigation is: flood irrigation, drip or trickle irrigation, overhead irrigation, subirrigation	flood
Many reservoirs are fed by underground water supplies flowing in: pipes, aquifers, streams, runoff	aquifers
The water-treatment process in which water is forced into the air is called: purification, aeration, sedimentation, filtration	aeration
Particles in the water are able to settle out by: filtration, aeration, sedimentation, boiling	sedimentation
Two chemicals used to purify water are: bicarbonate and calcuim, sulfur and oxygen, fluorine and sodium, ozone and chlorine	ozone and chlorine
True/False? distillation is the process used by water-treatment plants to kill dangerous microorganisms	False
True/False? reverse osmosis is a method of aeration?	false
True/False? groundwater can be a source of surface water	true
True/False? subsidence can result when overdraft occurs?	true
True/False? Coagulantes are used to aid in sedimentation?	true