Final answer:
Without specific data, numerical calculations for the volume change and rate of photosynthesis for Elodea under various light conditions cannot be made. However, conceptually, photosynthesis rates are expected to be higher under blue light compared to green light due to chlorophyll's absorption properties.
Step-by-step explanation:
The student's question pertains to calculating the rate of volume change and the rate of photosynthesis for Elodea in different light conditions. However, in order to calculate these rates, specific data regarding initial and final volumes over time, and potentially the oxygen production which could be a proxy for photosynthesis rate under each light condition, are required. Without this quantitative data, providing a numerical answer is not possible. Nevertheless, conceptual understanding can be conveyed. For instance, the different colors of light will have varying effects on the rate of photosynthesis due to chlorophyll's absorption spectrum, with blue light generally being more effective than green light.
Photosynthesis rates for Elodea could be predicted to be higher under blue light rather than green light because chlorophyll, the pigment responsible for photosynthesis, absorbs blue light more effectively. In the absence of data, we cannot quantify the volume change or photosynthesis rates but can anticipate trends based on biological principles. If the student can provide specific measurements, these calculations could then be performed and recorded in their laboratory data.