The student clearly stated the independent variable as the different chloride salts and the dependent variable as the temperature change in the research question. However, the research question lacked a specific description of the method of analysis, which should have included how measurements would be taken. The student provided a comprehensive theoretical background relevant to the investigation, along with a detailed methodology that facilitated reproducibility. The methodology was well-structured, with no irrelevant or repetitive information, and the student successfully identified and addressed safety, ethical, and environmental issues associated with the investigation. Additionally, the student effectively discussed the choice of trials and controlled variables, although there was a need for greater clarity on the measurement techniques employed.
