; 2007 AP® ENVIRONMENTAL SCIENCE FREE-RESPONSE QUESTIONS
Documents
Resources
Learning Center
Upload
Plans & pricing Sign in
Sign Out

2007 AP® ENVIRONMENTAL SCIENCE FREE-RESPONSE QUESTIONS

VIEWS: 1,945 PAGES: 2

  • pg 1
									      2007 AP® ENVIRONMENTAL SCIENCE FREE-RESPONSE QUESTIONS

                            ENVIRONMENTAL SCIENCE
                                   Section II
                               Time – 90 minutes

   1. Read the Fremont Examiner article below and answer the questions that
      follow.

                           CITY COUNCIL SWEAGE VOTE

Last night the Fremont City Council,           Ramos noted that the upgrade was
by a 4 to1 vote, approved an upgrade           needed to protect the water quality of
of the town’s sewage treatment plant,          the Fremont River. A local
which currently discharges one                 environmental science, Dr. Goodwin
million gallons of treated wastewater          advised the council members that
into the Fremont River daily, will be          sewage treatment plants may solve a
upgraded from primary to secondary             water quality problem, but they create
treatment next year. Councilperson             a solid –waste problem.


   (a) Identify ONE component of the sewage that is targeted for removal by
       primary treatment and ONE component of the sewage that is targeted for
       removal by secondary treatment.
   (b) For EACH of the pollutants that you identified in part (a), describe how the
       pollutant is removed in the treatment process.
   (c) Explain how sewage treatment plants create the solid waste problem that Dr.
       Goodwin mentioned in the article.
   (d) Two common methods of disposing of solid waste from sewage treatment
       plants are transporting it to a landfill or spreading it onto agricultural lands.
       Describe an environmental problem associated with EACH of these methods.
   (e) The final step in sewage treatment is disinfection. Identify ONE pollutant that
       is targeted during disinfection and identify ONE commonly used method for
       disinfection.
   (f) Identify ONE United States federal law that requires monitoring the quality of
       the treated sewage that is discharged into the Fremont River.
       2003 AP® ENVIRONMENTAL SCIENCE FREE-RESPONSE QUESTIONS

                             ENVIRONMENTAL SCIENCE
                                    Section II
                                Time – 90 minutes

Directions: Answer all four questions, which are weighted equally; the suggested
time is about 22 minutes for answering each question. Write all you answers on the
pages following the questions in the pink booklet. Where calculations are required,
clearly show how you arrived at your answer. Where explanations or discussion is
required, support your answers with relevant information and/or specific examples.

   1. Read the Fremont Examiner article below and answer the questions that
      follow.

                                   Worm Invasion

A researcher studying the ecology of           accumulation of slowly decomposing
the deciduous forest outside of                leaves. Dr. Tate explained that “the
Fremont has made an alarming                   leaf litter is critical to the survival of
discovery. While taking an inventory           local species of forest plants.” Dr. Tate
of the species present on the forest           has found the Asian worms, unlike
floor, Professor Peter Tate discovered         their indigenous cousins, consume the
many earthworms of an Asian species            entire layer of leaf litter in a single
not previously known to live in this           season. He said, “This sets the stage
area. The Asian worm, unlike native            for the takeover by invasive exotics
worms, have voracious appetites.               such as Japanese stilt grass.” Dr. Tate
The forest floor is home to a myriad of        and other scientist are exploring
species that live in the leaf litter,          strategies for the control of the Asian
which is composed of several years’            worms.


   (a) support Dr. Tat’s assertion that “the leaf litter is critical to the survival of
       local species of forest plants.”
   (b) Describe THREE abiotic changes that would be likely to result if the exotic
       worms consumed all the leaf litter in a single year.
   (c) For one of the changed you identified in part (b), explain how the change
       could set the stage for the takeover of Japanese stilt grass or other exotic
       species.
   (d) Design a controlled experiment to determine whether the worms, in fact, do
       change the forest ecosystem. Identify the environmental factor you will
       measure, and include the specific hypothesis you will test and the data you
       will collect.

								
To top
;