Question 1

The gases produced as a byproduct of anaerobic decomposition include

Accepted Answer

A)  Hydrogen sulfide and ethane. 
B)  Hydrogen sulfide and propane. 
C)  Hydrogen sulfide and butane. 
D)  Hydrogen sulfide and methane. 
A)  Hydrogen sulfide and ethane. 
B)  Hydrogen sulfide and propane. 
C)  Hydrogen sulfide and butane. 
D)  Hydrogen sulfide and methane.

Question 2

An oxygen sag curve describes how oxygen in a body of water is consumed by organisms,such as fish.

Accepted Answer

A) True 
 B)False

Question 3

Breakdown of organic matter in the absence of oxygen is this type of decay.

Accepted Answer

A)  Aerobic 
B)  Anaerobic 
C)  Biochemical 
D)  Eutrophic 
A)  Aerobic 
B)  Anaerobic 
C)  Biochemical 
D)  Eutrophic

Question 4

Eutrophication of water is accelerated by

Accepted Answer

A)  Increased sediment load from erosion. 
B)  Addition of oxygen. 
C)  Reduction in phosphate input. 
D)  Reduction in nitrate input. 
A)  Increased sediment load from erosion. 
B)  Addition of oxygen. 
C)  Reduction in phosphate input. 
D)  Reduction in nitrate input.

Question 5

A factory illegally dumps arsenic-rich wastewater into a lake,where the residence time of the arsenic is 10 years.If the dumping stops,after 30 years,the amount of arsenic in the lake will be one-third what it was when the dumping was stopped.

Accepted Answer

A) True 
 B)False

Question 6

In an agricultural region,

Accepted Answer

A)  Spring planting and application of fertilizers and herbicides can result in concentration spikes of these chemicals in rivers, due to spring rains. 
B)  Crops generally use the fertilizer applied to enhance their growth very efficiently. 
C)  Herbicides and pesticides are retained in the soil and do not present a water-pollution threat. 
D)  The use of filter strips in riparian zones (areas adjacent to streams) has not been demonstrated to be effective in reducing nutrient loading of streams. 
A)  Spring planting and application of fertilizers and herbicides can result in concentration spikes of these chemicals in rivers, due to spring rains. 
B)  Crops generally use the fertilizer applied to enhance their growth very efficiently. 
C)  Herbicides and pesticides are retained in the soil and do not present a water-pollution threat. 
D)  The use of filter strips in riparian zones (areas adjacent to streams) has not been demonstrated to be effective in reducing nutrient loading of streams.

Question 7

Improper agricultural techniques increase erosion rates nine times higher than normal resulting in

Accepted Answer

A)  Sediment erosion. 
B)  Sediment pollution. 
C)  Sediment aggregation. 
D)  Sediment increase. 
A)  Sediment erosion. 
B)  Sediment pollution. 
C)  Sediment aggregation. 
D)  Sediment increase.

Question 8

Nonpoint pollution sources are more diffuse and thus harder to monitor and control than are most point sources.

Accepted Answer

A) True 
 B)False

Question 9

Thermal pollution differs from most chemical pollution in that

Accepted Answer

A)  Despite being called "pollution", it causes no real harm. 
B)  It is localized in impact and short-lived. 
C)  It has by now effectively been eliminated as an environmental hazard. 
D)  All of the choices are correct. 
A)  Despite being called "pollution", it causes no real harm. 
B)  It is localized in impact and short-lived. 
C)  It has by now effectively been eliminated as an environmental hazard. 
D)  All of the choices are correct.

Question 10

The dose-response curve for arsenic

Accepted Answer

A)  Shows no benefit to low concentrations and great harm from high concentrations. 
B)  Shows that arsenic is beneficial to humans when consumed in low quantities, but toxic at high quantities. 
C)  Was a major factor in setting the new, lower drinking-water standard for dissolved arsenic of 10 ppb in public water supplies. 
D)  Shows that microorganisms can be very helpful in decontaminating a site with high arsenic levels. 
A)  Shows no benefit to low concentrations and great harm from high concentrations. 
B)  Shows that arsenic is beneficial to humans when consumed in low quantities, but toxic at high quantities. 
C)  Was a major factor in setting the new, lower drinking-water standard for dissolved arsenic of 10 ppb in public water supplies. 
D)  Shows that microorganisms can be very helpful in decontaminating a site with high arsenic levels.

Question 11

A possible consequence of eutrophication is

Accepted Answer

A)  Reduction of nutrient levels in a body of water. 
B)  Fish kills, because of the lowered dissolved oxygen in the water. 
C)  An increase in the biodiversity of the body of water. 
D)  Sequestration of dissolved toxins in lake sediments. 
A)  Reduction of nutrient levels in a body of water. 
B)  Fish kills, because of the lowered dissolved oxygen in the water. 
C)  An increase in the biodiversity of the body of water. 
D)  Sequestration of dissolved toxins in lake sediments.

Question 12

Use of settling ponds below farm fields reduces sediment pollution of surface runoff water.

Accepted Answer

A) True 
 B)False

Question 13

Chemical surveys by aircraft can help identify sites of particularly high probability of toxic-element contamination,such as areas affected by acid mine drainage.

Accepted Answer

A) True 
 B)False

Question 14

A lake may be described as "dead" when its condition is

Accepted Answer

A)  Eutrophic. 
B)  Aerobic. 
C)  Anaerobic. 
D)  Saline. 
A)  Eutrophic. 
B)  Aerobic. 
C)  Anaerobic. 
D)  Saline.

The gases produced as a byproduct of anaerobic decomposition include

An oxygen sag curve describes how oxygen in a body of water is consumed by organisms,such as fish.

Breakdown of organic matter in the absence of oxygen is this type of decay.

Eutrophication of water is accelerated by

A factory illegally dumps arsenic-rich wastewater into a lake,where the residence time of the arsenic is 10 years.If the dumping stops,after 30 years,the amount of arsenic in the lake will be one-third what it was when the dumping was stopped.

In an agricultural region,

Improper agricultural techniques increase erosion rates nine times higher than normal resulting in

Nonpoint pollution sources are more diffuse and thus harder to monitor and control than are most point sources.

Thermal pollution differs from most chemical pollution in that

The dose-response curve for arsenic

A possible consequence of eutrophication is

Use of settling ponds below farm fields reduces sediment pollution of surface runoff water.

Chemical surveys by aircraft can help identify sites of particularly high probability of toxic-element contamination,such as areas affected by acid mine drainage.

A lake may be described as "dead" when its condition is

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Exam 17: Water Pollution

The gases produced as a byproduct of anaerobic decomposition include

An oxygen sag curve describes how oxygen in a body of water is consumed by organisms,such as fish.

Breakdown of organic matter in the absence of oxygen is this type of decay.

Eutrophication of water is accelerated by

A factory illegally dumps arsenic-rich wastewater into a lake,where the residence time of the arsenic is 10 years.If the dumping stops,after 30 years,the amount of arsenic in the lake will be one-third what it was when the dumping was stopped.

In an agricultural region,

Improper agricultural techniques increase erosion rates nine times higher than normal resulting in

Nonpoint pollution sources are more diffuse and thus harder to monitor and control than are most point sources.

Thermal pollution differs from most chemical pollution in that

The dose-response curve for arsenic

A possible consequence of eutrophication is

Use of settling ponds below farm fields reduces sediment pollution of surface runoff water.

Chemical surveys by aircraft can help identify sites of particularly high probability of toxic-element contamination,such as areas affected by acid mine drainage.

A lake may be described as "dead" when its condition is

Planet and Population: An Overview

Rocks and Minerals-A First Look

Plate Tectonics

Earthquakes

Volcanoes

Streams and Flooding

Coastal Zones and Processes

Mass Movements

Ice and Glaciers,wind and Deserts

Climate-Past, present, and Future

Ground Water and Water Resources

Weathering, erosion, and Soil Resources

Mineral and Rock Resources

Energy Resources-Fossil Fuels

Energy Resources-Alternative Sources

Waste Disposal

Air Pollution

Environmental Law and Policy

Land-Use Planning and Engineering Geology

Filters