2. QUESTION: Review The picture shows a(n) …… ? a) Estuary b) Wetland
c) Oxbow lake
d) River delta
Answer: c

3. QUESTION: Review
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
Answer: d

4. QUESTION: Review A confined aquifer is defined as…?
An aquifer that traps porous rocks between layers of less permeable substrate
An aquifer that traps porous rocks under one layer of less permeable substrate
An aquifer with porous rocks resting on bedrock
An aquifer with no upper layer
Answer: a

5. QUESTION: Review Arid countries tend to use their water mostly for…?
Developing industries
Agriculture
Households
Export to rich countries
Answer: b

6. QUESTION: Review
Which of the following statements is not a benefit of dams?
Habitat alteration
Power generation
Crop irrigation
Shipping
Answer: a

7. QUESTION: Review
Pollution is defined as “the release of matter or energy into the environment that causes ______”?
Undesirable impacts on human health
Undesirable impacts on other organisms
Undesirable impacts on human well-being
All of the above are included in the definition
Answer: d

8. QUESTION: Review
Which of the following is a nonpoint source of water pollution?
A factory
Sewer pipes
Agricultural fields
All are nonpoint sources
Answer: c

9. QUESTION: Review Primary treatment of wastewater includes…?
Treating water with chemicals
Stirring and aerating water
Degradation of wastes by bacteria
Physical removal of contaminants
Answer: d

10. QUESTION: Interpreting Graphs and Data
What is the relationship between water consumption and the amount of land that is irrigated?
Irrigation has grown more slowly than demand
Irrigation and demand have both increased
Growth of demand and irrigation will slow
The U.S. does not follow this graph
Answer: b

11. QUESTION: Interpreting Graphs and Data
Which conclusion can you draw from this graph?
a) It is more water efficient to produce vegetables
b) It is more water efficient to produce meat
c) Vegetable and meat production are relatively alike in water consumption
d) There is little correlation between water consumption and our diet
Answer: b
From The Science behind the Stories

12. QUESTION: Viewpoints
In 2001, angry farmers disobeyed a federal order to divert irrigation water downstream to save endangered species of fish. What should happen to the farmers?
Nothing; they need the water for their crops
They should be fined for breaking the law
They should be paid subsidies so they can continue farming
They should be paid to plant different crops that do not require so much water
Answer: any

13. QUESTION: Viewpoints
Should cities in dry areas such as Las Vegas be allowed to increase their populations, so that they will require more water?
Yes; it’s not the American way to limit what cities can do
Yes, but the people will have to pay the true cost of water
Yes, but only if the people are required to use drastic conservation measures
No; enough is enough, and cities in arid environments simply cannot continue growing
Answer: any