| Explore | 1) Plant stems grow toward light and away from the ground. Or they display photo and gravitropisms. 2) Plants are green which means they reflect green light. Chlorophyll absorbs blue and red light better than green. |
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| Research Question | Does the wavelength of light affect the rate of photosynthesis? |
| Predictions | Blue light will have the fastest rate followed by red and green will be the slowest. |
| Experimental Design | Wrap three cups with colored cellophane red, blue and green. Keep a fourth cup unwrapped. In each cup there will be 100ml of 0.2% Baking soda solution and 10 spinach leaf disks. Measure photosynthesis by counting how fast the disks float over time. Prior to beginning the experiment each of the leaf disks will be infiltrated with the baking soda solution using a 10ml syringe. |
| Conclusion |
