which of the following best describes the effects of water pollution on aquatic ecosystems? a. it can result in fish kills and restrictions on human consumption. b. it can change the physiology of fish. c. it can cause long-term alterations of aquatic ecosystems. d. all of the above
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get which of the following best describes the effects of water pollution on aquatic ecosystems? a. it can result in fish kills and restrictions on human consumption. b. it can change the physiology of fish. c. it can cause long-term alterations of aquatic ecosystems. d. all of the above from EN Bilgi.
Which of the following best describes the effects of water pollution on aquatic ecosystems? a. It can result in fish kills and restrictions on human consumption. b. It can change the physiology of fish. c. It can cause long
Which of the following best describes the effects of water pollution on aquatic ecosystems? a. It can result in fish kills and restrictions on human consumption. b. It can change the physiology of fish. c. It can cause long-term alterations of aquatic ecosystems. d. All of the aboveNone
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Which of the following best describes the effects of water pollution on aquatic ecosystems? a. It can result in fish kills and restrictions on human consumption. b. It can change the physiology of fish. c. It can cause long-term alterations of aquatic ecosystems. d. All of the above
-- 7 months ago
Answers
The correct answer for the above question is D. all the above
Effects of water pollution on aquatic ecosystems include; results in fish kills and restrictions on human consumption, can change the physiology of fish and also can cause a long term alterations of aquatic ecosystems.
Explanation;
Water pollution involves dumping of wastes such as plastics, emissions from industries, a change in pH due to agricultural wastes to aquatic environments such as rivers, seas and oceans, most of which results from human activities. This brings about negative effects to the aquatic ecosystems, For example; Due to acidity, the aquatic environment becomes less sustaining for any form of life with shells such as mollusks. It may also result to permanent loss of biodiversity and aquatic species, such as coral reefs which are some of the most diverse ecosystems with many complex interactions.
Answerd by bhjones
4 months ago 192 4.9
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Water Pollution pretest Flashcards
Memorize flashcards and build a practice test to quiz yourself before your exam. Start studying the Water Pollution pretest flashcards containing study terms like sorry I couldn't add more. I passed the pretest., Which of the following factors determines how harmful an introduced chemical will be on the environment? a. type of chemical b. concentration c. weather conditions d. all of the above, Nonpoint source pollution is difficult to control because it _______. a. comes from a direct point of origin b. comes from a variety of sources c. remains the same over time d. none of the above and more.
Water Pollution pretest
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Which of the following factors determines how harmful an introduced chemical will be on the environment?
a. type of chemical b. concentration c. weather conditions d. all of the above
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d. all of the above
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Terms in this set (11)
sorry I couldn't add more. I passed the pretest.
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Which of the following factors determines how harmful an introduced chemical will be on the environment?
a. type of chemical b. concentration c. weather conditions d. all of the above d. all of the above
Nonpoint source pollution is difficult to control because it _______.
a.
comes from a direct point of origin
b.
comes from a variety of sources
c.
remains the same over time
d. none of the above b.
comes from a variety of sources
The principle difference between point source and nonpoint source water pollution is _______.
a.
whether the pollution is organic or inorganic
b.
the number of sources of pollution
c.
the amount of pollution
d.
whether it is from commercial or agricultural sources
b.
the number of sources of pollution
Point source pollution is much more difficult to track and clean up than nonpoint source pollution.
F. false
Which of the following best describes the effects of water pollution on aquatic ecosystems?
a.
It can result in fish kills and restrictions on human consumption.
b.
It can change the physiology of fish.
c.
It can cause long-term alterations of aquatic ecosystems.
d. All of the above d. All of the above
Changing your toilet can reduce water pollution because _______.
a.
the sewage is partially treated in the toilet before entering the sewer system
b.
chemicals added by new toilets neutralize the pathogens in the water
c.
more efficient plumbing uses more water and creates larger volumes of waste
d.
more efficient plumbing uses less water and creates smaller volumes of waste
d.
more efficient plumbing uses less water and creates smaller volumes of waste
How does de-icing roads with salt negatively impact the environment?
a.
The road salt attracts deer that are then hit by motor vehicles.
b.
It removes necessary salt from the local water courses.
c.
The high salinity of the surface runoff is harmful to freshwater ecosystems.
d.
The salt harbors salt eating bacteria that are toxic to animals.
c.
The high salinity of the surface runoff is harmful to freshwater ecosystems.
Which of the following is true concerning sources of water pollution?
a.
Mine wastes and heavy metals become water pollution through storm water runoff.
b.
Biodegradable materials like food, wood, and leaves are not considered pollution.
c.
Petroleum byproducts and fuels end up as pollution principally from oil spills.
d.
Pesticides and herbicides do not commonly become water pollutants.
a.
Mine wastes and heavy metals become water pollution through storm water runoff.
Which of the following is the most serious effect of water pollution for humans?
a. infectious diseases b. algal blooms c.
toxic food chain effects
d. low-oxygen water a. infectious diseases
Introduced sewage in water systems _______.
a.
decreases levels of phosphorus and nitrogen
b.
increases oxygen levels
c.
increases concentrations of solids
d.
leads to decreases in the temperature
c.
increases concentrations of solids
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Water Pollution Facts, Types, Causes and Effects of Water Pollution
Our rivers, reservoirs, lakes, and seas are drowning in chemicals, waste, plastic, and other pollutants. Here’s why―and what you can do to help.
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Water Pollution: Everything You Need to Know
Our rivers, reservoirs, lakes, and seas are drowning in chemicals, waste, plastic, and other pollutants. Here’s why―and what you can do to help.
May 14, 2018 Melissa Denchak
Jump to Section
What Is Water Pollution?
What Are the Causes of Water Pollution?
Categories of Water Pollution
The Most Common Types of Water Contamination
What Are the Effects of Water Pollution?
What Can You Do to Prevent Water Pollution?
British poet W. H. Auden once noted, “Thousands have lived without love, not one without water.” Yet while we all know water is crucial for life, we trash it anyway. Some 80 percent of the world’s wastewater is dumped—largely untreated—back into the environment, polluting rivers, lakes, and oceans.
This widespread problem of water pollution is jeopardizing our health. Unsafe water kills more people each year than war and all other forms of violence combined. Meanwhile, our drinkable water sources are finite: Less than 1 percent of the earth’s freshwater is actually accessible to us. Without action, the challenges will only increase by 2050, when global demand for freshwater is expected to be one-third greater than it is now.
Sip a glass of cool, clear water as you read this, and you may think water pollution is a problem . . . somewhere else. But while most Americans have access to safe drinking water, potentially harmful contaminants—from arsenic to copper to lead—have been found in the tap water of every single state in the nation.
Still, we’re not hopeless against the threat to clean water. To better understand the problem and what we can do about it, here’s an overview of what water pollution is, what causes it, and how we can protect ourselves.
What Is Water Pollution?
Water pollution occurs when harmful substances—often chemicals or microorganisms—contaminate a stream, river, lake, ocean, aquifer, or other body of water, degrading water quality and rendering it toxic to humans or the environment.
What Are the Causes of Water Pollution?
Water is uniquely vulnerable to pollution. Known as a “universal solvent,” water is able to dissolve more substances than any other liquid on earth. It’s the reason we have Kool-Aid and brilliant blue waterfalls. It’s also why water is so easily polluted. Toxic substances from farms, towns, and factories readily dissolve into and mix with it, causing water pollution.
Categories of Water Pollution
Groundwater
When rain falls and seeps deep into the earth, filling the cracks, crevices, and porous spaces of an aquifer (basically an underground storehouse of water), it becomes groundwater—one of our least visible but most important natural resources. Nearly 40 percent of Americans rely on groundwater, pumped to the earth’s surface, for drinking water. For some folks in rural areas, it’s their only freshwater source. Groundwater gets polluted when contaminants—from pesticides and fertilizers to waste leached from landfills and septic systems—make their way into an aquifer, rendering it unsafe for human use. Ridding groundwater of contaminants can be difficult to impossible, as well as costly. Once polluted, an aquifer may be unusable for decades, or even thousands of years. Groundwater can also spread contamination far from the original polluting source as it seeps into streams, lakes, and oceans.
Surface water
Covering about 70 percent of the earth, surface water is what fills our oceans, lakes, rivers, and all those other blue bits on the world map. Surface water from freshwater sources (that is, from sources other than the ocean) accounts for more than 60 percent of the water delivered to American homes. But a significant pool of that water is in peril. According to the most recent surveys on national water quality from the U.S. Environmental Protection Agency, nearly half of our rivers and streams and more than one-third of our lakes are polluted and unfit for swimming, fishing, and drinking. Nutrient pollution, which includes nitrates and phosphates, is the leading type of contamination in these freshwater sources. While plants and animals need these nutrients to grow, they have become a major pollutant due to farm waste and fertilizer runoff. Municipal and industrial waste discharges contribute their fair share of toxins as well. There’s also all the random junk that industry and individuals dump directly into waterways.
Ocean water
Eighty percent of ocean pollution (also called marine pollution) originates on land—whether along the coast or far inland. Contaminants such as chemicals, nutrients, and heavy metals are carried from farms, factories, and cities by streams and rivers into our bays and estuaries; from there they travel out to sea. Meanwhile, marine debris—particularly plastic—is blown in by the wind or washed in via storm drains and sewers. Our seas are also sometimes spoiled by oil spills and leaks—big and small—and are consistently soaking up carbon pollution from the air. The ocean absorbs as much as a quarter of man-made carbon emissions.
Point source
When contamination originates from a single source, it’s called point source pollution. Examples include wastewater (also called effluent) discharged legally or illegally by a manufacturer, oil refinery, or wastewater treatment facility, as well as contamination from leaking septic systems, chemical and oil spills, and illegal dumping. The EPA regulates point source pollution by establishing limits on what can be discharged by a facility directly into a body of water. While point source pollution originates from a specific place, it can affect miles of waterways and ocean.
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