EVR Chapter 12

25 July 2022
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question
Which of the following groups is least likely to support the use of offshore oil rigs as artificial reefs?
answer
sierra club
question
If offshore oil rigs are used as artificial reefs in California, which of the following is most likely?
answer
the rigs will be colonized naturally
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Which of the following is the biggest reason oil companies approve of using offshore oil rigs as artificial reefs?
answer
to save money
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You are a marine biologist interested in learning more about the use of rigs as artificial reefs. Which of the following places would be best for you to see how well this process works?
answer
gulf of mexico
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If rigs-to-reefs gains popularity in California, which of the following will most likely be true?
answer
the artificial reefs will be good for diving and for fishing
question
One reasonable way to prevent sinkholes might be to ________.
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increase groundwater recharge by constructing artificial wetlands that use treated municipal wastewater
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Which of the following statements is true?
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most of earth's fresh water is frozen
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What is the spatial relationship between the distributions of water and people?
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populations and water resources too often have an inverse relationship
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Humans use more fresh water for ________ than for any other purpose.
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irrigating crops
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Pathogens and waterborne diseases enter drinking water supplies from ________.
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poorly treated wastewater and animal wastes from feed lots
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The fish in the lake at the local park are dying, and a professor from the local college comes to investigate. First, she measures the levels of dissolved oxygen in order to check for ________.
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hypoxia
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Which of the following statements about Earth's fresh water is true?
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most of earth's fresh water is in polar ice caps, glaciers, and underground aquifers and thus is not easily accessed for human use
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It is the second longest river in the world and responsible for about 20 percent of the freshwater that flows into the world's oceans.
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amazon
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The La Plata River Basin includes the _____ river.
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paraná
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The Amazon River Dolphin inhabits both the Amazon and Orinoco Rivers. What is the climate in the region of the Orinoco?
answer
tropical savanna
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The source of the Amazon River is the Peruvian Andes in this part of the mountain range.
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cordillera occidental
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The Negro River is the largest blackwater river in the world. "Blackwater" refers to the fact that it is a deep river that flows slowly through forested swamps and wetlands, with dark-colored waters as a result of tannins that are leached out of decaying vegetation. What country does this blackwater river flow through?
answer
brazil
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What does the Murphree Water Treatment Plant use to disinfect the water?
answer
chlorine
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What federal agency regulates the bottled water industry?
answer
food and drug administration
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Which of the following is considered to be the safest drinking water source?
answer
the groundwater
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What is the next frontier in the drinking water industry?
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desalination
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Once a groundwater supply is contaminated with marine water, how long will it remain contaminated?
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forever
question
What are the two types of aquifers?
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confined and unconfined
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Sinkholes can result from ________.
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overconsumption of water from aquifers
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Ocean water is 96.5% water by mass. Most of the remainder consists of __________.
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ions from dissolved salts
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"Biosolids" produced at a wastewater treatment plant are often ________.
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used as crop fertilizer
question
Classify each pollutant based on the category that best describes its impact on waterways.
answer
toxic chemicals: acid drainage, herbicide pathogens and waterborne diseases: medical waste thermal pollution: frigid water nutrient pollution: nitrogen-rich grass, phosphorous-rich fertilizer sediment: clay soil, eroded topsoil
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Which is the correct term to describe fish and other ocean organisms that are caught accidentally along with the targeted fish?
answer
bycatch
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Currently, the greatest ecological crisis facing marine food webs is ________.
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overharvesting
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Which of the following is a systematic shift in atmospheric pressure, sea surface temperature, and ocean circulation patterns in the tropical Pacific Ocean that alters weather patterns on a worldwide scale?
answer
el niño-southern oscillation (ENSO)
question
Freshwater wetlands provide important ecosystem services, including ________.
answer
all of the above
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Which of the following is a nonconsumptive use of water as a resource?
answer
hydroelectric power
question
What can be concluded from the graph? Select all that apply.
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in the last 20 million years of earth's history, the average pH has never gone below 8.0 average ocean pH has fluctuated over the millennia from just over 8.0 to about 8.3
question
How could this data be best represented graphically?
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line graph
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The following graphs represent the future projections from Part B. Drag the labels to their appropriate locations on the graphs.
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y-axis (300-900): atmospheric CO2 (ppm) y-axis (7.6-8.2): oceanic pH x-axis: year yellow: optimistic purple: middle ground red: pessimistic
question
Drag the terms on the left to the appropriate blanks on the right to complete the sentences.
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1. 400, 8.1 2. 600 3. 700 4. 800 5. 8.0 6. negatively (or inversely) 7. positively (or directly)
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Drag "True" or "False" to the end of each statement.
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1. true 2. true 3. false 4. false 5. true 6. false
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____________ is the rising of deep, cold, dense water toward the surface.
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up-welling
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For the strategies below, decide whether they are best described as demand-side solutions or supply-side solutions to meeting human needs for fresh water. Remember that a demand-side solution reduces demand for fresh water, whereas a supply-side solution increases the supply of fresh water. Drag each description to the appropriate bin.
answer
supply-side solutions: desalinating sea water damming a river a nation invading demand-side solutions: raising water prices providing tax breaks requiring low-flow replacing inefficient
question
What is the direct cause of death for aquatic animals during eutrophication?
answer
a loss of dissolved oxygen in the water
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A watershed is ________.
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the area of land that drains into a river or lake
question
According to the Federal Emergency Management Agency, the number of human-induced sinkholes has doubled since 1930. Insurance claims increased 1200% from 1987 to 1991, costing nearly $100 million. A major reason for this is ________.
answer
increased water consumption through development and urbanization
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Upwelling ________.
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bring benthic nutrients to the ocean surface promoting high primary productivity
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What does the y-axis show?
answer
percent of recovery compared to natural wetlands
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What does the red graph line represent?
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plant biomass
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After 20 years, how much plant biomass does a restored wetland contain?
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about 80% of the biomass of a natural wetland
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After 55 years, how does the capacity of a restored wetland to absorb nutrients compare to that of a natural wetland?
answer
about 40% of natural wetland capacity
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Is the following statement supported or not supported by the data shown in the graph? Most of the productivity of a wetland can be restored within 50 years, but it takes much longer to restore soil fertility.
answer
supported
question
Natural wetlands provide many ecosystem services. When a wetland is restored, which of the following ecosystem services returns most rapidly?
answer
providing food for fish and wildlife
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Is the following statement supported or not supported by the data shown in the graph? The restoration of a wetland takes about 100 years.
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cannot be determined from the graph
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The exceptionally strong warming of the eastern Pacific is referred to as ________.
answer
el niño
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Many present-day fisheries managers ________.
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wish to set aside areas of ocean where systems can function without human interference
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What is the most cost-effective solution for groundwater depletion and land-level subsidence?
answer
allowing no more water to be withdrawn from an aquifer than is naturally recharged
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The area that underlies the shallow water bordering continents is called the ________.
answer
continental shelf
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Which of the following wetland environments only occurs for a short period of time each year?
answer
vernal pools
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Water currents along the coastline of Chile pull up deep water that is __________.
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cold and high in nutrients
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The largest fishery on Earth, located along the west coast of Chile, consists of __________.
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1% of the ocean and provides 20% of the world's total fish catch
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In which one of the following locations is the ocean current flowing from the north toward the equator?
answer
west coast of the united states
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A boat floating along the eastern shore of Florida is expected to drift __________.
answer
northwards toward the new england states
question
Which of the following will contribute to water conservation?
answer
watering lawns at night and landscaping with native plants
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What caused the Aral Sea, the fourth largest lake on Earth, to lose four-fifths of its volume in 40 years?
answer
overconsumption by cotton farmers
question
What type of coastal feature experiences fluctuations in salinity with daily and seasonal variations?
answer
estuaries
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The region of a lake where plants are able to attach to the bottom and still reach above the surface is known as the __________.
answer
littoral zone
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Water bodies where rivers flow into the oceans, mixing fresh water with saltwater, are called ________.
answer
estuaries
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Which of the following types of pollution is most responsible for large numbers of deaths worldwide because of unsafe drinking water?
answer
pathogen pollution
question
Thomas Flint and Christine Stallard cite multiple benefits of dams. Which of the following statements represents their primary argument for the importance of dams?
answer
global water use has increased at twice the rate of population growth, and dams can provide water
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Sara Nicholas presents the case for dam removal by offering a variety of reasons. Which of the following reasons is her primary argument for removing dams?
answer
all dams harm riparian environments
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Which of the following environmental concerns do both essay discuss?
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dams block passage for migratory fish
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The essay in support of dam removal avoids one key environmental benefit touted by dam advocates. If the authors were participating in a debate, how might dam advocates state this benefit?
answer
dams use a renewable "fuel" (water) to generate clean electricity
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You are part of a panel that reviews dam permits for renewal. Your panel hears testimony from both pro-dam and pro-dam removal advocates. Which of the following scenarios is least likely to be controversial?
answer
removal of a mill dam for a now defunct mill operation
question
What technology is used to extract freshwater from ocean water?
answer
desalinization
question
The following answers for the Causes and Consequences features are examples and are not intended to represent a comprehensive list. In addition, the sequence of items is not meant to connote relative importance. Sort the examples below into the appropriate bin.
answer
causes: oil spills, plastic debris, nutrient pollution consequences: animals, birds and fish, formation solutions: tightening, reduction, prevention
question
Most of Earth's liquid fresh water is found ________.
answer
underground
question
What is a marine protected area?
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any portion of the ocean that is protected from some human activities but may be open to others, such as the laying of cables and some fishing
question
Zooxanthellae are ________.
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symbiotic algae that provide energy to many species of corals
question
A septic system is ________.
answer
a rural method of processing wastewater
question
The following answers for the Causes and Consequences features are examples and are not intended to represent a comprehensive list. In addition, the sequence of items is not meant to connote relative importance. Sort the examples below into the appropriate bin.
answer
causes: groundwater, domestic, population growth consequences: altered plant, water shortages, salinization solutions: development, improvement, deployment
question
As a result of humans' increased use of the water in the Colorado River, __________.
answer
fisheries in the upper gulf of california have been hurt
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In the past 50 years, the global hydrological environment has experienced great change due to __________.
answer
the construction of more than 40,000 new dams
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Which of the following is a promising way to reduce global water consumption?
answer
avoiding waste and mismanagement
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All of the following are examples of point sources of pollution except ________
answer
a large farm
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Which term describes a regular periodic change to the ocean's height due to the gravitational influence of the moon and the sun?
answer
tides
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The rapid melting of Greenland's ice cap could disrupt the NADW formation by ________.
answer
adding huge amounts of less-dense fresh water to the surface of the system
question
If the captain of a fishing fleet wanted to catch fish over a vast expanse of ocean, which of the following would be an effective method to do so?
answer
driftnets
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What is the name of an area of land that is drained by a river and all of its tributaries?
answer
watershed
question
Which of the following best describes a floodplain?
answer
a region of land that is periodically flooded when a river overflows
question
Recent research that analyzed the content of commercial bottled water indicates that ________.
answer
bottled water is no safer or purer than most samples of tap water
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Precipitation that falls on Earth's surface ________.
answer
may take a variety of pathways through surface water or groundwater flow
question
We build dams to ________.
answer
generate electricity, prevent flooding, and provide irrigation and drinking water
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Oceans have absorbed approximately one-third of the excess carbon dioxide that humans have added to Earth's atmosphere so far. This has slowed the progression of global climate change, but it has led to ________.
answer
a decrease in the pH (ocean acidification)
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The Earth's atmosphere is composed mostly of ________.
answer
nitrogen and oxygen
question
What information is given on the x-axis?
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time in 4-hour intervals
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What does the red line represent?
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temperature
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What was the temperature at 9:00 A.M. on Day 1?
answer
12 celcius
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Which day had the greatest range in temperature?
answer
day 2
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What is the best description of the relative humidity between 9:00 A.M. and 5:00 P.M. on Day 1?
answer
the relative humidity dropped from 100% to 55%
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In which part of Days 1 and 2 was the humidity lowest?
answer
late afternoon/evening
question
When was it most likely to have been foggy?
answer
day 2 between 5
question
Most water taken out of the natural world is used for __________.
answer
irrigation