The student clearly states the independent variable (temperature) and the dependent variable (volume of oxygen produced) in the research question. The methodology is well described, with detailed steps and relevant materials that enable reproducibility. The student identifies and addresses various safety, ethical, and environmental issues associated with the investigation, demonstrating awareness and responsibility. However, the student needs to clarify the choice of measurement techniques and provide a rationale for the selected temperature settings, as well as discuss the number of trials conducted to enhance the reliability of the results. Overall, while the student has a solid foundation, there are areas for improvement in justifying methodological choices.
