The student clearly explained how the data was collected and processed, including repeated trials, mean gas volumes, and rate calculations. Tables and figures were appropriately presented, and the processing of rates and uncertainties was relevant to the research question. However, the student did not adequately explain or justify the timing uncertainty, nor did they account for the 5-second recording intervals and the delay before timing, so the impact on the calculated rates was unclear. The student supported the conclusion with repeated measurements, calculated rates, and a clear trend, with no major omissions or inconsistencies identified.
