Table 5 is repeated below. The leaf discs in the investigation are green. Explain the results in Table 5 for blue light and for green light. Use data from Figure 10 and Table 6.

The explanation requires linking the data from all three sources. **For Blue Light:** * **Result (Table 5):** The time taken for the discs to rise is short (115 seconds). A short time indicates a fast rate of photosynthesis. * **Reason (Figure 10 & Table 6):** Table 6 shows blue light has a wavelength of 450-499 nm. Looking at Figure 10, both chlorophyll a and b show high percentage absorption in this range. Because a lot of blue light is absorbed, there is a lot of energy for photosynthesis, leading to a high rate of oxygen production, which makes the discs rise quickly. **For Green Light:** * **Result (Table 5):** The time taken is very long (831 seconds). A long time indicates a very slow rate of photosynthesis. * **Reason (Figure 10 & Table 6):** Table 6 shows green light has a wavelength of 500-570 nm. Figure 10 shows a large dip in absorption for both chlorophylls in this range. This is because green light is mostly reflected by chlorophyll, not absorbed (which is why leaves appear green). With very little light energy being absorbed, the rate of photosynthesis is very low, oxygen is produced very slowly, and thus it takes a long time for the discs to become buoyant and rise.