Name ________________________ EEOS 120 Midterm 2—Part I Individual Part (50 points) Due Before Class, 11:00 am, Nov 8th, 2012 Please make 2 copies of your exam (one to turn in, one to use for Part II)...

Name ________________________

EEOS 120



Midterm 2—Part I
Individual Part (50 points) Due Before Class, 11:00 am, Nov 8th, 2012
Please make 2 copies of your exam (one to turn in, one to use for Part II)

Instructions:


A.) You may use any source of information except human resources (
you are to complete Part I of the exam without consulting any other person
). Textbook, web sources, library sources, etc. are fine. Please list the sources that you have used at the end of each question.
B.) Please type if possible. Feel free to write in figures, drawings, and equations if necessary by hand.
C.) As a rule of thumb, you are not expected to spend more than 1.5 hours per question. This means that you might spend ~1 hour researching the question and 30 minutes writing your answers.
D.) Please provide detailed support for any of your statements or answers. In other words, a simple “yes” or “no”, “agree” or “disagree”, or “I think it is clean”, is not a complete answer and will not receive credit. A complete answer takes the form of “Yes, because … and therefore...” or “I think it is clean because ….”.
E.) There is not necessarily any right or wrong answers to these questions. You will be graded on your ability to think and write critically in addressing these environmental issues. More detailed, supportive responses will be more valued than generalizations.
F.) Please staple all answers together and write your name on each page.
Once you have completed the exam:


Please sign the following statement
: “I have not consulted any other person in completing this INDIVIDUAL Part I of the exam.”
___________________________
For information purposes only (this will not affect your grade), how much time (hours) did you spend on this exam?
______________

1.) BIODIVERSITY

1. Place a hula hoop (real or imagined) (a hula hoop is a 1 m diameter circle) around a vegetated area in your backyard (park, school). [This is a real assignment, not an imaginary one. Do it! Spend at least 5 minutes examining your area.] How many species do you count? Describe them. (2 points)

b.) Choose one of the species in the hula hoop. Describe its ecological niche. (3 points)
c.) If you were to shade this area with an umbrella for a month, how would the species distribution change? Explain your reasoning. (2 points)
d.) Name one species that you found in your hula hoop (could be the same or different from the one in (b)). How can you alter abiotic or biotic conditions to promote the success of that one species at the expense of the others? (3 points)

1. 
   CLIMATE
   

a.) What factors determine the mean (average) monthly temperatures at Great Blue Hill (located in Canton, MA, 6 miles southwest of Boston)? Which of these factors are regional factors? Which are global? (3 points)
b.) Is this year’s temperature record at Great Blue Hill an indication of Global Warming? Why or why not? (4 points)
c.)What else would you need to know in order to answer (b) better? (3 points

3.) OZONE

Below is a graph of total Global Ozone Change (red line) compared with a 15-year average (straight black line) taken before the recent decline.

1. Explain how the manufacture and release of certain chemicals has influenced this graph. Specifically, why did total global ozone start decreasing around 1980? Why has it leveled off in the early 1990s? (6 points)

b.) Describe the processes that create a maximum of ozone around 15 km in the October average from 1967-1971. What were the processes that decreased these values at 15 km in the 1986 and 2001 curves? (4 points)

4.) PLATE TECTONICS

a.) Why is there a bimodal distribution of elevations on the surface of the earth? (4 points)
b.) Why is there so much of the earth’s surface at or near sea-level? (3 points)
c.) Why hasn’t Mt. Everest eroded down to sea-level? Why hasn’t the Mariana Trench filled up with sediment? (3 points)

5.) COASTAL GEOMORPHOLOGY

a.) Identify the coastal features in the photo on the left (A). What processes formed these features? Explain. (3 points)
b.) Identify the coastal features in the photo on the right (B). What processes formed these features? Explain. (3 points)
c.) What might be the future of (A) and (B) in 1, 10, and 100 years? Why? (4 points)