The student clearly stated the independent variable as the concentration of Zinc Sulfate and the dependent variable as the voltage of the electrochemical cell in the research question. They described the method of analysis, focusing on how varying concentrations affect voltage, and provided a solid background theory relevant to the investigation. The student explained their choice of techniques and sampling method, detailing the rationale behind their selected concentrations and the importance of controlled variables. However, the student failed to address safety, ethical, and environmental issues associated with the investigation, which were essential components that needed improvement. Overall, the methodology was well-described and allowed for reproducibility, with no irrelevant information included.
