CHAPTER 11: WATER

Parasitic worms would be classified as which type of water pollutant?

• pathogen
• inorganic chemicals
• organic matter
• heavy metals

Which of the following is not a true statement about the social & environmental impact of dams?

• Dams are built to resolve disputes between countries.
• Environmental concern is 1 reason for decreased construction
• Dams allow a river’s power to be converted into energy.
• Land behind the dam changes b/c of the change in river flow

What is the purpose of adding chlorine to water during the water treatment process?

• to filter and remove large debris
• to kill bacteria, as well as prevent future bacterial growth
• form flocs that bacteria and other impurities will cling to
• to remove unwanted gases

The _________ is the continuous movement of water between Earth and its atmosphere 

• rain cycle
• cloud cycles
• water cycle
• vapor cycle

An effective approach to preventing future shortages of usable water should focus on

• emphasizing the additive effect of individual conservation
• developing and refining new ways to produce fresh water
• reducing pollution of water sources by education/enforcement
• All of the above

The largest watershed in the United States is the

• Mississippi River. 
• Colorado River.
• Yukon River.
• Rio Grande.

An area of land through which water percolates to be stored as groundwater is known as a(n)

• percolation zone
• top soil zone
• recharge zone 
• groundwater zone

Disease-causing bacteria and viruses that can contaminate a water supply are known as 

• disease carriers
• germs
• pathogens
• microbes

How is fresh water used in industry?

• in manufacturing processes
• to generate power
• in the disposal of waste products
• All of the above 

Which of the following is one way a person could conserve water?

• take a long bath instead of a shower
• use a low-flow showerhead and take short showers
• wash laundry in small, partial loads
• water your lawn daily and at mid-day