ENVH CH 9
Card Set Information
ENVH CH 9
Which of the following are involved in the hydrological cycle?
-Sun, atmosphere, earth, water
All of the above
Which of the following is NOT a process normally associated with the hydrological cycle?
Plants add water to the atmosphere, in a process called __________.
Water covers ____ of the earth's surface.
_____ of the total amount of water on earth is salt water contained within the oceans and seas.
Less than _____ of the earth's water exists as accessible freshwater, available for human use.
Water comprises approximately _____ of the human body.
Which of the following is NOT normally a major factor in how a country manages its water resources ?
-Wild animal population of the country, economy of country, available tech, level of industry, agriculture
wild animal population of the country
Which of the following is not normally an effective water management technique?
_______ often consumes the largest portion of the freshwater supply.
Over ______ of the world's water demand is used for irrigation.
Groundwater sources supply drinking water to approximately ____ of the people living in the United States.
Which of the following are potential sources of groundwater contamination?
-Accidental spills, stormwater runoff, wastewater, aquifer water, agricultural runoff
a. accidental spills
b. stormwater runoff
e. agricultural runoff
Which of the following are types of pollutants found in groundwater?
synthetic organic chemicals
Water stress occurs when more than ________ of the available fresh water is being used.
Which of the following inorganic compounds is NOT of particular health concern in the water system?
Agriculture demands an average of _____ of the world's fresh surface waters, making it the largest consumer of fresh water.
The main steps of water treatment include which of the following?
Which of the following is NOT normally used for water disinfection?
Primary treatment of wastewater is largely a _________ process.
T/F: The heat absorption from the sun to transform water into different states is an important component of the hydrological cycle.
T/F: It is believed that most of the easily accessible sources of fresh water are currently in use.
T/F: Our current water supplies can NOT meet the huge demand of water.
T/F: Water scarcity and unclear water rights can cause or exacerbate national and international conflict.
T/F: The countries most affected by water scarcity are developing countries.
T/F: Sustainable water use implies that current needs are met without diminishing the resource for future generations' use and at no expense to environmental need.
T/F: 60% of the water used in agriculture is lost to evaporation or runoff.
T/F: The bulk of domestic water use in the United States serves for flushing toilets, showering, and watering lawns.
T/F: Desalinization is NOT yet being used in this world to obtain fresh water.
T/F: Many of the claims on bottled water, such as "pure" and "natural" are meaningless, as these terms are NOT regulated by any government agency.
T/F: Many industrial discharges are considered point sources, as they enter waterways at a single location.
T/F: After the treatment of sedimentation, coagulation-flocculation, filtration, and disinfection, the water should be free of most contaminants.
List the three major categories of water consumers in the world.