Explanation should include the effects of
- pollution
- water temperature
- manufactured aeration
- wind
- photosynthesis
- decomposition (e.g., eutrophication).
Process/Skill Questions:
- How do dissolved oxygen levels affect water quality and aquatic life?
- What methods are used to measure dissolved oxygen?
- How do different organisms respond to lower or higher dissolved oxygen levels?
- What are signs of dissolved oxygen deficiency?
- How can dissolved oxygen deficiencies be corrected?