The student clearly stated the independent variable as the temperature of the copper(II) sulfate electrolyte and the dependent variable as the mass of copper deposited at the cathode. The posed research question effectively described the method of analysis, detailing the measurement of copper deposition over time. A comprehensive background theory was provided, connecting electrolysis principles to the experiment, and the choice of techniques for measuring both variables was well-explained. The methodology was thoroughly described, including controlled variables and safety, ethical, and environmental considerations, ensuring that the investigation would be reproduced without irrelevant information.
