Only around 2.5% of every the water top top our earth is freshwater, however, ________.

A) many of this is in secret aquifers

B) most of this is in polar ice caps, glaciers, and also underground aquifers and is not easily accessed for human use

C) over fifty percent of this is extremely hard water and also is virtually unusable because that drinking or agriculture

D) most of this is in large, freshwater lakes

E) over half of this is in wetlands near coastlines and also is coming to be contaminated through saltwater

most of this is in polar ice cream caps, glaciers, and also underground aquifers and also is not easily accessed for human use

Of the following, ________ characterize(s) an oligotrophic lake or pond.

A) high nutrient levels

B) low oxygen concentrations

C) high oxygen concentrations

D) short nutrient levels

E) Both C and also D

Precipitation that falls on Earth"s surface ________.

A) might take a selection of pathways through surface water or groundwater flow

B) is usually already unusable because of acid rain

C) is largely taken up by tree or various other organisms

D) greatly runs off into salt marshes or the ocean

E) practically entirely filter down into the secret aquifers

One-fifth that Earth"s complete fresh water it is provided is in ________.

A) estuaries

B) groundwater

C) ponds

D) the ocean

E) the tundra

Freshwater wetlands provide important ecosystem services, consisting of ________.

A) slowing runoff

B) to reduce flooding

C) recharging aquifers

D) filtering pollutants

E) all of the above

An artesian fine occurs when ________.

A) one aquifer is trapped under pressure in between two layers the are less permeable

B) granite is overlain by a sandy substrate, permitting percolation right into the aquifer

C) a water-bearing, porous great of rock, sand, or gravel has built up groundwater end a long period of time

D) there are numerous aquifers that have actually merged

E) a well is dug v layers of sand and gravel right into the water table

Humans allocate about 70% of their annual freshwater usage for ________.

A) agricultural irrigation and also providing water for livestock

B) washing and also home use

C) electrical production

D) mining and industrial processes

E) drinking and also cooking

Water bodies whereby rivers flow into the oceans, mixing new water v saltwater, are dubbed ________.

A) upwellings

B) estuaries

C) littoral ecosystems

D) salt marshes

E) mangroves

Of the following, ________ finest describes floodplains.

A) an area wherein flood irrigation of plants is used, such as a rice paddy

B) an area that is incidentally flooded when farming or mining operations adjust the course of rivers

C) a an ar of soil that has been deliberately, permanently flooded due to human disturbance, such as in dam building

D) a an ar of land that is regular flooded when a flow overflows

E) an area the is regular flooded because humans have transformed the landscape

an area that is regularly flooded because humans have altered the landscape

Oceans have took in approximately one-third that the overfill carbon dioxide that people have added to Earth"s environment so far. This has slowed the progression of an international climate change, but it has led to ________.

A) expansion of oyster populations worldwide

B) lose of oxygen indigenous the oceans

C) a diminish in the pH (ocean acidification)

D) rise in the pH the the world"s oceans

E) boosts in expansion of coral reefs

a to decrease in the pH (ocean acidification)

We construct dams to ________.

A) drainpipe wetlands for urban development

B) improve habitat for aboriginal fish

C) manage the spread out of water borne diseases

D) transform watersheds right into farms, towns, and recreational areas

E) generate electricity, avoid flooding, and provide irrigation and drinking water

generate electricity, avoid flooding, and administer irrigation and drinking water

Dam removal in this nation ________.

A) will probably continue because the eco-friendly impacts the dams space reviewed periodically

B) will certainly probably increase rapidly as we relocate to a much more fossil-fuel-dependent society

C) is controversial since dams provide such an excellent habitats for native species

D) offers many brand-new jobs and opportunities and so is financially beneficial

E) will aid with our change to much more natural develops of renewable energy

will more than likely continue due to the fact that the environmental impacts that dams room reviewed periodically

Data suggest that the current rate the freshwater usage in most occurred countries is ________.

A) raising groundwater storage and also decreasing surface ar water storage

B) irrelevant, together water is not at this time limiting

C) just a problem in areas not top top the coast

D) sustainable because that the foreseeable future

E) unsustainable


Why to be the watering of Soviet cotton farming work a problem?

A) There to be governmental the contrary that minimal water access, killing crops.

You are watching: Xeriscaping can save water by ________.

B) the angered neighborhood resort communities, which did not desire farming in the region.

C) watering water come from rivers feeding into one that the biggest lakes ~ above Earth and also resulted in significant contamination of the source.

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D) that was, for the many part, not a problem.

E) it drained the Aral Sea and resulted in the lose of 60,000 fishing jobs
It drained the Aral Sea and resulted in the ns of 60,000 fishing jobs

Water in the surface ar zone the the ocean is, for the most component ________.

A) the saltiest

B) the coldest

C) the densest

D) depleted of oxygen

E) well-mixed


Which the the complying with will contribute to water conservation?

A) Planting non-native wetland plants because that landscaping

B) Watering lawns throughout peak sunshine hours, as soon as plants need water most

C) Watering lawns in ~ night, utilizing low-flow faucets, landscaping with aboriginal plants

D) using aerial sprays for crop irrigation

E) Washing dishes by hand

Watering lawns in ~ night, utilizing low-flow faucets, landscaping with aboriginal plants

The area that underlies the shallow water bordering continents is referred to as the ________.

A) groundwater aeration zone

B) pelagic zone

C) water table

D) benthic zone

E) continental shelf

continental shelf

Of the following, ________ is among the major pollutants the groundwater.

A) carbon dioxide

B) house garbage

C) acid rain

D) fertilizer from farming fields

E) treated sewer from cities

fertilizers from agricultural fields

Pathogens and also waterborne illness enter drinking water offers from ________.

A) oil and also chemical spills

B) overfill nitrogen and also phosphorus as agricultural runoff

C) poorly treated wastewater or from pet wastes from feeding lots

D) upwelling

E) pesticides entering groundwater

poorly treated wastewater or from animal wastes from feeding lots

You want to maintain a healthy and balanced pond at your school site. Last year an additional pond came to be eutrophic; to avoid that, you want to ________.

A) boost the carbon-based fertilizer in the littoral zone

B) avoid boosting phosphorus runoff right into the limnetic zone

C) diminish the calcium easily accessible in the profundal zone

D) increase the ozone in the littoral zone

E) carry out nitrogen for great nutrient mix in the benthic zone

avoid raising phosphorus runoff into the limnetic zone

All that the adhering to are instances of suggest sources that pollution except ________.

A) a big farm

B) a drain pipe

C) a factory discharging wastes right into a lake through a huge outlet

D) a automobile repair shop dumping waste oil into the storm drain

E) an overturned tanker truck that spills into a creek
a big farm

Wastewater the is stirred and also aerated so the aerobic bacteria consume many of the small pieces the organic issue in the wastewater is being based on ________.

A) pre-treatment

B) major treatment

C) simple treatment

D) tertiary treatment

E) an additional treatment

secondary treatment

The "blue-baby" syndrome the suffocates babies is a consequence of overfill ________ in the water supply.

A) phosphates

B) E. Coli

C) chlorine

D) carbon

E) nitrates


The primary impact of thermal pollution on aquatic ecosystems is ________.

A) lowering the pH that the water

B) lowering the water table

C) causing a huge increase in tree productivity

D) enhanced evaporation

E) depleting dissolved oxygen

depleting liquified oxygen

Zooxanthellae are ________.

A) bacteria that resolve nitrogen in s sediments

B) symbiotic birds that carry out energy come many types of corals

C) one invasive kelp species in the Indian Ocean

D) an endangered types of fish in the Aral Sea

E) supplied in the therapy of wastewater

symbiotic algae that administer energy come many types of coral

The initial repercussion of falling water tables would certainly be the loss of ________.

A) birds that live in upland areas

B) agricultural irrigation water

C) trees that do ideal with low precipitation

D) deep lakes

E) mammals that grow in dry habitats
agricultural irrigation water

A septic system is ________.

A) a rural technique of dealing with sewage

B) a 2nd level device to remove bacteria in ~ a wastewater therapy plant

C) a toxicity or badly polluted waterway

D) very early version that a wastewater treatment plant

E) the usage of natural wetlands to clean wastewater
a rural an approach of managing sewage

In a municipal water treatment plant, the major treatment step consists of ________.

A) filtering the sewage

B) chlorinating the sewage

C) stirring the sewer to boost oxidation

D) letting sewage sit in huge tanks for this reason suspended solids settle out

E) adding bacteria to the sewage

letting sewer sit in large tanks therefore suspended solids work out out

lot of the biosolids product that is the end product the a water treatment plant is ________.

A) used as chop fertilizer in the unified States

B) trucked to unique biohazard landfills because that disposal

C) loaded onto barges and sent to underdeveloped nations to use as fertilizer

D) placed in deep injection wells to save it out of the water table

E) provided as part of the "fill" to develop wetlands into agriculture or real estate areas

used as crop fertilizer in the united States

The exceptionally strong warming the the eastern Pacific is described as ________.

A) cyclonic storm formation

B) downwelling

C) La Niña

D) the Coriolis effect

E) El Niño

El Niño

Upwelling ________.

A) is the circulation of warmth water upward towards the ocean surface

B) wake up in areas where there room no currents

C) transports oxygen from deep to surface ar waters

D) brings benthic nutrients to the s surface cultivating high main productivity

E) occurs when winds punch at right angles to a coastline
brings benthic nutrients to the s surface fostering high main productivity

Overpumping underground water in coastal areas can cause ________ to move right into aquifers, make the water undrinkable.


B) saltwater

C) untreated sewage

D) difficult water ions

E) rely solids


Xeriscaping have the right to save water through ________.

A) developing wetlands rather of landscaping

B) eliminating landscape plantings, instead of plants with rocks, sand and sculpture

C) planting invasive exotic tree species

D) collecting rain water and storing it in cisterns or tanks

E) planting indigenous or drought-resistant tree with tiny or no water requirements

planting native or drought-resistant plants with tiny or no water requirements

Recent research study that analyzed the contents of advertisement bottled water suggests that ________.

A) all surveyed brands had information around the resource and exactly how it to be treated

B) bottled water has no air pollution from hormone mimic plasticizers

C) bottled water consumes less fossil fuel in getting to the consumer than insanity water does

D) bottled water is significantly cheaper than tap water

E) bottled water is no more secure or purer than most samples that tap water

bottled water is no safer or purer than most samples that tap water

Artificial wetlands ________.

A) are the major program for replacing lost herbal wetlands

B) purify water for usage as bottled drinking water

C) can help purify water and also also administer recreational opportunities

D) room a resource of arsenic contamination in Bangladesh

E) are developed using xeriscaping methods
can aid purify water and also also carry out recreational opportunities

Salt marshes are ________ ecosystems, while mangroves are ________.

A) temperate intertidal; discovered on subtropical and also tropical shorelines

B) overcame by kelp; found in coral reefs

C) tropic intertidal; found on pleasant shorelines

D) benthic; freshwater dry ecosystems

E) freshwater; pelagic

temperate intertidal; found on subtropical and also tropical shorelines

Bycatch ________.

A) refers to the accidental catch of animals

B) is the practice of return female and also young fish earlier to the ocean

C) is fishing because that two varieties of fish concurrently

D) is fishing only at deep levels of the ocean

E) is fishing just at the surface of the ocean

refers to the accidental capture of animals

Many present-day fisheries supervisors ________.

A) donate short-term services to naval ecosystem problems

B) want all laws concerning fishing to it is in abolished

C) favor taxes on commercial fishing boats

D) wish to set aside locations of s where systems can role without human being interference

E) favor defense of commercially valuable varieties and no others

wish to set aside areas of ocean where solution can function without person interference

Most naval protected locations ________.

A) prohibit the installation if oil pipelines and fiber-optic cable lines within them

B) ban fishing and also extractive activities

C) have been established without the consent that the unified States

D) room in the open up oceans

E) are along the coasts of emerged nations

space along the coasts of developed nations

The rapid melting the Greenland"s ice cap might disrupt the NADW formation by ________.

A) reversing the El Niño-La Niña cycle

B) adding heat and also salt come deep ocean waters

C) adding large amounts that less dense fresh water to the surface of the system

D) acidifying s water

E) including excess nutrient to cold north waters
adding huge amounts of less thick fresh water come the surface of the system

In thermohaline circulation of global current systems, surface ar water is ________.

A) warm and dense

B) pushed by winds from phibìc to south

C) saltier and also colder

D) much less salty, less dense, and warmer

E) cold and also dense

less salty, much less dense, and also warmer

A 2003 study reported the ________% that large-bodied fish and also sharks were shed in the very first decade of established fishing.

A) 50

B) 20

C) 40

D) 10

E) 90


Currently, the biggest ecological crisis facing naval food webs is ________.

A) abandoned fishing nets

B) radiation

C) oil spills

D) overharvesting

E) plastic dumping