# VIRTUAL LAB--dissolved oxygen primary productivity

```VIRTUAL LAB—DISSOLVED OXYGEN &amp; AQUATIC PRIMARY PRODUCTIVITY
Go to the following website:
http://www.phschool.com/science/biology_place/labbench/lab12/intro.html
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What type of oxygen do aquatic organisms use?
What are the 2 purposes of this lab?
How does temperature affect dissolved oxygen?
How does light availability affect dissolved oxygen?
How does decomposition affect dissolved oxygen?
How does turbulence affect dissolved oxygen?
How does salinity affect dissolved oxygen?
TAKE THE 3 QUESTION QUIZ (IDEAL CONDITIONS FOR MAX. DISSOLVED OXYGEN). Write
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11. Name AND define the 2 aspects of primary productivity.
12. Why can’t we measure gross primary productivity directly?
13. How can we measure net primary productivity?
14. How can respiration without photosynthesis be measured?
15. Type in the equation for photosynthesis, check your answer, AND write it here:
16. Name 3 ways in which primary productivity can be measured.
17. Which method are we using in this lab?
18. Attach the graph of the data for Dissolved Oxygen &amp; Temperature.
19. What does a nomograph measure?
20. What is the % oxygen saturation for a water sample at 10 C that has 7 mg/oxygen/Liter?
21. Using a straight edge, what is the % oxygen saturation for a water sample at 25 C that
has 7 mg/oxygen/Liter?
22. As depth increases in a body of water, what happens to light available for
photosynthesis?
23. How do we model this condition in this lab? STUDY THE DIAGRAM FOR THIS
PROCEDURE.
24. Describe what is happening in the light bottle based on the animation.
25. Describe what is happening in the dark bottle based on the animation.
26. What are you measuring AFTER the first day of the lab?
27. As results are analyzed, how is respiration calculated?
28. How is gross primary productivity calculated?
29. How is net primary productivity calculated?
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SAMPLE PROBLEM:
*****Work through the sample problem with your teacher.
*****ALSO, graph your data on graph paper.
*****TAKE THE 4 QUESTION LAB QUIZ, WRITE DOWN YOUR ANSWERS, THEN CHECK