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An investigation was carried out to study the effect of light and dark conditions on gas exchange in an aquatic plant using hydrogencarbonate indicator solution.
Method
Method
1. Fill a test tube with hydrogencarbonate indicator solution. 2. Place a piece of aquatic plant (e.g., Elodea) in the test tube. 3. Place the test tube in bright light for 10 minutes and observe the color change. 4. Repeat the experiment by placing the test tube in complete darkness for 10 minutes and observe the color change. 5. Record the color changes in both conditions.
| Variable | Description |
|---|---|
| Independent variable | |
| Dependent variable | |
| Control variables |
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