Environmental Studies Exam 3

Environmental Studies Exam 3

Environmental Studies Exam 3



1.       Define the term toxicology.


2.       What is the difference between an LD50 and an ED50?



3.       What federal agency is responsible for regulating possible toxic substances in the environment?


4.       How does the term “half-life” apply to toxicology?



5.       What is the difference between “bioaccumulation” and “biomagnification”?





6.       Why are the possible impacts of indoor air quality more of a concern now than 50 years ago?



7.       Disease is the single-most common mortality factor in humans. Which is more important? Circle One:  1. Infectious   2.  Aids    3. Malaria     4. Non-infectious


8.       Give an example of a non-infectious disease that is common in modern people



9.       What is the difference between “acute” and “chronic” exposure?



10.   Why is it often difficult to identify the real risks of chronic exposure to a certain chemical?




11.   What is meant by the term “synergistic effect”?




12.   What is a precise definition of the term “wetland”?




13.   What is the difference between a “swamp” and a “marsh”?





14.   List 2 things mentioned in class that make wetlands very valuable natural areas.

a.       ___________________________________________________________

b.       ___________________________________________________________

15.   Define the term “watershed”




16.   What exactly is meant by the term “runoff”?




17.   Define the term “hydroperiod”. Be specific




18.   Briefly, how do ocean currents affect the earth’s climate?






19.   Coral reefs are important for a great many living organisms. Why?




20.   Coral reefs are very sensitive to oceanic conditions. List 2 conditions that greatly affect their ability to live.

a.       ___________________________________________________

b.       ___________________________________________________


21.   If something is “pelagic”, where does it live?



22.   What kind of organism cannot live in the profundal zone?



23.   What would make a water body eutrophic?




24.   Where exactly is the benthic  zone?




25.   What is the littoral zone AND why is it important? ANSWER BOTH PARTS




26.   What is the significance of the Hadley cells?




27.   In which atmospheric zone does all of our weather occur in?




28.   In which atmospheric zone does the “ozone layer” occur in?



29.   Why is this layer so important to life on earth?



30.   What is “acid rain”?



31.   How does acid rain form?




32.   Why is it important?





33.   What gas makes up almost ¾’s of the earth’s atmosphere?



34.   What is the second-most abundant gas?________________________________

35.   Greenhouse and other gases in the atmosphere make up approximately how much of the remainder?



36.   Which federal agency established under the Clean Air Act has the responsibility for monitoring and regulating air pollutants




37.   What causes smog specifically?




38.   What, specifically, is the difference between weather and climate.




39.   There are 2 major ways that we handle the waste we produce. Name them

a.       ___________________________________________________________

b.       ____________________________________________________________

40.   Briefly describe how your answer in (a) works






41.   Briefly describe how your answer in (b) works








42.   There are problems associated with both of these methods. List one problem, in order (a) and (b) for each

a.       ___________________________________________________________________

b.       ___________________________________________________________________









43.   What constitutes most of our municipal waste?


There are 3 steps to any municipal recycling program that have to work properly for the overall program to be successful.  List them:

44.   __________________________________________________________

45.   __________________________________________________________

46.   __________________________________________________________


47.   The German woman in the TED talk video we watched was not a proponent of recycling. What was the solution she proposes?


48.   She talked about 3 main parts to her solution that, if followed, would make it work. Name one.


49.   Name one thing that would be considered a “single-use” item


50.   What is “composting”?