AP Biology Dissolved Oxygen Lab
Name: ______________________________
Watch the Bozeman Biology Dissolved Oxygen Lab Video. Google it or use one of the links
below:
http://www.bozemanscience.com/ap-bio-lab-12-dissolved-oxygen
https://www.youtube.com/watch?v=XEcBQurjUQ4
1. Explain the lab procedure in your own words.
2. What does the lab tell us about dissolved oxygen?
Next, go to the Pearson Classic Biology Lab Bench and find the Dissolved Oxygen lab. Or
follow this link:
http://www.phschool.com/science/biology_place/labbench/lab12/intro.html
1. Answer: Why did the fish in the aquarium die?
2. How is oxygen concentration in water affected by:
a. temperature
b. photosynthetic activity
c. decomposition activity
d. mixing and turbulence
e. salinity
3. Which environment has the greater concentration of dissolved oxygen: salt or fresh
water?
4. Which environment has the greater concentration of dissolved oxygen: warm or cool
water?
5. Which environment has the greater concentration of dissolved oxygen: a clear pond or a
pond with lots of algae?
6. Compare and contrast net and gross productivity.
7. What are the 3 ways to measure primary productivity? Which way does this lab
measure?
AP Biology Dissolved Oxygen Lab
Name: ______________________________
8. What is the percent oxygen saturation for a water sample at 10°C that
has 7 mg O2/l?
9. What is the percent oxygen saturation for a water sample at 25°C that
has 7 mg O2/l?
10. Explain the lab procedure in your own words.
Complete the lab quiz online and record yours answers below.
11. In which aquatic environment would you expect dissolved oxygen to be
highest?
12. Below is the correct graph of the data you were given in the Sample
Problem. Study this graph to answer the following question:
At what light intensity do you expect there to be no net productivity?
13. What is meant by "net productivity" and how is it calculated in a sample
aquatic environment?
14. A biology class used two aquatic cultures as described below for the
experiment with screens that reduce light. They measured dissolved
oxygen initially, and then after 24 hours. What results would you predict for
this experiment?