Purpose:
- To be able to measure the amount of dissolved oxygen in water samples at different temperatures
- To be able to analyze the effect of varying amounts of light on primary productivity
- To fully understand what the ideal light conditions are for O2 to be dissolved in H2O
Procedures:
| 1. | The aquatic sample must be rich in photosynthetic organisms — water that is so algae-rich it appears green is good for this activity. |
| 2. | Keep the water samples in a very bright light during the 24-hour period. Fluorescent bulbs do not give off much heat, but if you use an incandescent light bulb, you will need to place a heat sink (such as a beaker filled with water) between the light bulb and your bottles. |
Typical results:
Lab bench questions:
Lab bench quiz: See in paper copy (could not attach on blog as it was saved as a PDF)
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