11.3 Water Pollution Review

What is the main difference between point-source and nonpoint-source pollution?

• Point-source pollution is easier to control than nonpoint-source pollution.
• Point-source pollution comes from natural sources, while nonpoint-source pollution comes from human activities.
• Point-source pollution is less harmful to the environment than nonpoint-source pollution.
• Point-source pollution comes from a single, identifiable source, while nonpoint-source pollution comes from multiple, diffuse sources.

Organize these water pollutants into the right categories.

Groups:

(a) Pathogens

,

(b) Organic Matter

,

(c) Physical Agents

,

(d) Chemicals

• Viruses

• Fertilizers

• Heat

• Feces

• Pesticides

• Paper

• Bacteria

Heavy Metals are another major category of water pollutants. Which of the following is NOT an example of a heavy metal water pollutant?

• Mercury
• Arsenic

• Oxygen

• Lead

Why is groundwater pollution so difficult to clean up?

• Lack of technology to treat groundwater pollution
• Groundwater pollution is not actually difficult to clean up
• Hard to access and slow cycling of water through the ground

• Groundwater pollution does not exist

Which of the following are major sources of ocean pollution?

• Plastic waste, industrial discharge, and oil spills
• Household waste, deforestation, and nuclear accidents
• Agricultural runoff, wind erosion, and volcanic eruptions
• Air pollution, light pollution, and noise pollution

Which of the following is NOT a major effect of pollution on ecosystems?

• Disruption of food chains
• Biomagnification

• Habitat destruction
• Increase in biodiversity

Which of the following correctly describes the process of biomagnification?

• Decrease in the concentration of a pollutant as it moves up a food chain.

• Biomagnification only affects organisms at the top of a food chain.

• Accumulation of a pollutant as it moves up a food chain.

• Biomagnification only affects non-living organisms.

Which of the following is NOT a major law designed to improve water quality?

• Clean Water Act

• Water Quality Act

• Oceans Act

• Endangered Species Act

What is eutrophication?

• Decrease in water temperature due to excessive sunlight exposure
• Increase in the population of fish and other aquatic animals due to lack of food
• Rapid decline of algae and other aquatic plants due to lack of minerals and nutrients
• Increase in growth of algae and other aquatic plants due to mineral and nutrient enrichment

What is the difference between eutrophication and artificial eutrophication?

• Eutrophication is caused by natural factors, while artificial eutrophication is caused by aliens
• Eutrophication is a natural process, while artificial eutrophication is the accelerated process caused by human activities.

• Eutrophication is the process of water purification, while artificial eutrophication is the process of water contamination
• Eutrophication is the result of pollution, while artificial eutrophication is caused by excessive rainfall