Question 22
Investigate how light intensity, varied by the distance of a freshwater plant from a light source, affects the rate of photosynthesis. Materials: freshwater plant (such as elodea, cabomba or hydrilla), beaker, test tube, water, ruler, light source such as a lamp, timer or stopwatch. Using your observations and results, complete the following sentence: As the distance of the lamp from the plant increases, the light intensity __________.
