Water Pollution

A lake that averages 20 feet of water depth experiences extreme eutrophication. In this lake, we would expect to find abundant fish, high oxygen levels, slightly cloudy water. dead fish, low numbers of living fish, low oxygen levels, and very cloudy water. fewer fish than usual, lower oxygen levels, and very clear water. abundant fish, high oxygen levels, and very clear water.

dead fish, low numbers of living fish, low oxygen levels, and very cloudy water.

In order to prevent diseases transmitted by water, All of these wastes should be collected and treated. public water supplies should be purified. public preparation of food should be sanitary.

All of these

Which of the following methods of fighting eutrophication will not increase sunlight to the bottom of a pond and protect aquatic organisms? Applying herbicides Filtering runoff Harvesting Aerating

Applying herbicides

What do wastewater treatment facilities primarily depend upon for the breakdown of pathogenic organisms and organic materials in wastewater? Lots of chlorine bleach Bacterial decomposers and detritus feeders Large amounts of antibiotics and disinfecting chemicals The neutralizing effects of high levels of oxygen

Bacterial decomposers and detritus feeders

Which of the following wastewater pollutants is removed during primary treatment? Dissolved Organic Matter Dissolved Inorganic Matter Debris and Grit Pesticides

Debris and Grit

Which of the following wastewater pollutants is removed during secondary treatment? Dissolved Inorganic Matter Debris and Grit Dissolved Organic Matter Heavy Metals

Dissolved Organic Matter

Which of the following is an indicator of eutrophication? A dried up pond. Green, cloudy water from phytoplankton and algae growth. Clear water with lots of diversity. Murky water filled with suspended sediments.

Green, cloudy water from phytoplankton and algae growth.

Which Revolution led to a drastically increased amount of chemicals and sewage being dumped into rivers? Fertility Revolution Technology Revolution Neolithic Revolution Industrial Revolution

Industrial Revolution

Which of the following is not a type of water pollution? Sediments Nutrients Pathogens Molecular Oxygen

Molecular Oxygen

Which of the following best illustrates a point source of pollution? Fertilizer from farm lands emptying into a nearby river Raw sewage released into a river fom a wastewater treatment plant Yard pesticides entering nearby streams Storm-water drainage from the parking lot around a football stadium

Raw sewage released into a river from a wastewater treatment plant

Which one of the following represents a way to reduce point-source pollution contributing to cultural eutrophication? Remove nutrients from sewage-treatment discharge pipes Increase the use of contour farming and crop rotation Include roadway runoff detention ponds in subdivisions Require that CAFO waste be treated before going into waterways

Remove nutrients from sewage-treatment discharge pipes

Which one of the following best illustrates a nonpoint source of pollution? Storm-water drainage from the parking lot around a football stadium Raw sewage released into a river fom a wastewater treatment plant Oil leaking into the ocean from an oil rig Wastewater from a coal-fired power plant

Storm-water drainage from the parking lot around a football stadium

The increasing abundance of mercury in larger fish is an example of final cleansing. bed load. eutrophication. biomagnification.

biomagnification.

A new gravel road is cut into the side of a mountain just north of Anchorage, Alaska. As the snow melts in June, the fine gravel and sediments of the disturbed region quickly tumbles into the bottom of nearby streams and shades out light. The addition of this fine gravel and sand changes the stream by decreasing the number of plants and animals that live there. increasing the number of plants but decreasing the number of animals that live there. decreasing the number of plants but increasing the number of animals that live there. increasing the number of plants and animals that live there.

decreasing the number of plants and animals that live there.

The water conditions in an oligotrophic lake reveal a body of water that most likely has low levels of nutrients and low levels of oxygen. high levels of nutrients and low levels of oxygen. high levels of nutrients and high levels of oxygen. low levels of nutrients and high levels of oxygen.

low levels of nutrients and high levels of oxygen.

Sediments move in the water by quantum and thermal loads. bed and quantum loads. suspended and quantum loads. suspended and bed loads.

suspended and bed loads.

Sediments act as water pollutants because create new surfaces above water. they reduce light penetration. promote increased plant growth. they increase light penetration.

they reduce light penetration.

High concentrations of nutrients become pollutants because they promote only the growth of land plants. they directly feed marine animals. they stimulate undesirable plant growth. they prevent undesirable plant growth.

they stimulate undesirable plant growth.