1. The area of a lake that contains open water that does not receive sunlight is called the _______zone.
a) Littoral
b) Benthic
c) Limnetic
d) Profundal
2. A confined aquifer is defined as…?
a) An aquifer that traps porous rocks between layers of less permeable substrate
b) An aquifer that traps porous rocks under one layer of less permeable substrate
c) An aquifer with porous rocks resting on bedrock
d) An aquifer with no upper layer
3. Arid countries tend to use their water mostly for…?
a) Developing industries
b) Agriculture
c) Households
d) Export to rich countries
4. Which of the following statements is not a benefit of dams?
a) Habitat alteration
b) Power generation
c) Crop irrigation
d) Shipping
5. Pollution is defined as “the release of matter or energy into the environment that causes ______”?
a) Undesirable impacts on human health
b) Undesirable impacts on other organisms
c) Undesirable impacts on human well-being
d) All of the above are included in the definition
6.Which of the following is a nonpoint source of water pollution?
a) A factory
b) Sewer pipes
c) Agricultural fields
d) All are nonpoint sources
7. Primary treatment of wastewater includes…?
a) Treating water with chemicals
b) Stirring and aerating water
c) Degradation of wastes by bacteria
d) Physical removal of contaminants
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