Score: ___________/45 points
Name: ____________________________
Biogeochemical Cycles
Nitrogen, Phosphorous, Carbon, and Water
Part I: Multiple Choice/Fill in the Blanks (1 Point Each)
1.
Which of the following organisms performs nitrogen fixation?
a. Plants
b. Animals
c. Bacteria
d. All of the above
2.
The process of denitrification converts ____________ to ______________ (both are
types of nitrogen).
3.
What chemical form does carbon mostly move around in?
a. Water
b. Cellulose
c. Methane
d. Carbon dioxide
4.
What is one thing that organisms use water for in their bodies/cells?
______________________________________________________________________________
______________________________________________________________________________
5.
Which of the following is one of the uses for phosphorous inside of cells?
a. ATP
b. DNA
c. Protein synthesis
d. Bones
e. All of the above
Part 2: Short Answer: Answer each of the following questions about each nutrient cycle (10
points each)
1.
In detail, connect our study of the water cycle to something else we have done this year.
Write a paragraph or draw a diagram. There are many different answers to this question, so take
some time and think about why the water cycle is relevant to YOU!
2.
Describe the link between the carbon cycle and the greenhouse effect.
3.
Why is phosphorous considered a one-way cycle for human purposes? How does this
connect to another unit we have discussed this year?
4.
What does it mean if I say that nitrogen is the limiting nutrient in a pond? How might that
pond receive a surplus of nitrogen? What might that pond look like afterward and what is that
process called?