Apes 13 and 14 module test

A point source discharges organic waste into a stream. Which of the following graphs best depicts the expected pattern for dissolved oxygen (DO) in this stream as a function of distance from the discharge point?

(refer to graph)

What is the approximate dosage for the LD50 amount? (Enter answer as only a number)

100 (refer to graph)

At 50 mg/kg, what percentage of the population would have died from this chemical? (Enter your answer as a number)

20 (refer to graph)

What law was implemented in reaction to Love Canal?

CERCLA (Superfund)

In the U.S., any pollution that is deposited into lakes, rivers and streams is regulated by the:

Clean Water Act

Alligators in a Florida lake polluted by high levels of dioxins (chlorinated hydrocarbons) had low testosterone levels and failed to reproduce. Scientists came to the conclusion that the dioxins were acting as which of the following?

Endocrine disruptors

Dead zones in lakes and oceans are characterized by a lack of ____.

Oxygen

Which of the following best describes a way that persistent organic pollutants ( POPs ) cause harm in the environment?

Persistent organic pollutants are soluble in fat, so they accumulate in an organisms' fatty tissues.

Which law regulates how hazardous materials need to be tracked and reported?

Resource Conservation and Recovery Act (RCRA)

Which of the following is the usual cause of cultural eutrophication in surface waters of both developed and developing countries?

Runoff of nitrate compounds into bodies of water

The superfund process involves identifying, investigating, and cleaning up sites contaminated with hazardous waste.

True

All of the following could/should be used to deal with the side effects of eutrophication in lakes EXCEPT

adding nitrates

What is by far the leading cause of water pollution?

agriculture activities

Waste that includes paper, food wastes, cans, bottles, yard waste, glass, wood, and similar items is called ____.

municipal solid waste

Plastic is made from ____.

organic molecules derived from oil and natural gas

Of the following materials, the most difficult to recycle is

plastic

Much of the e-waste in the United States not buried or burned is ____.

shipped to Asia or Africa

Obstacles to recycling in the United States include

tax breaks for mining virgin materials lack of inclusion of environmental costs in market prices. lack of large, steady markets for recycled materials. (All of the above)

The world's largest producer of municipal solid waste (MSW) is ____.

the United States

The Superfund program pays

to clean up inactive or abandoned hazardous-waste dump sites.