The student clearly stated the independent variable as the concentration of Zinc Oxide and the dependent variable as the Sun Protection Factor (SPF) in the research question. The methodology for analysis was well-defined, utilizing UV-Visible Spectrophotometry to measure the effects of varying Zinc Oxide concentrations on SPF. The background theory was thoroughly explained, linking relevant concepts to the research question, and the choice of techniques for measuring the variables was justified, demonstrating an understanding of the experimental design. The student effectively addressed controlled variables, safety, ethical, and environmental issues, ensuring a comprehensive approach to the investigation. Additionally, the methodology was presented in a transparent and reproducible manner, free from irrelevant information.
