The student clearly identified the independent and dependent variables in the research question, specifying the brewing methods and coffee bean origins as independent variables, and the volume of NaOH needed to reach a pH of 8 as the dependent variable. However, the student did not describe the method of analysis conducted in the research question, which should have included details on how the titration was performed. The methodology was well-detailed, including the choice of sampling techniques, controlled variables, and safety considerations, which allowed for the reproducibility of the investigation. While the student addressed environmental issues related to the investigation, they failed to identify any ethical concerns, which should have been acknowledged. Overall, the student's work demonstrated a solid understanding of the research context and methodology; however, some improvements were needed in clarity regarding the analysis method, and consideration of ethical implications was required.
