The student clearly states the independent and dependent variables in the research question, identifying the varying masses of potassium chloride as the independent variable and the cooling rate of the solutions as the dependent variable. However, the student does not describe the method of analysis used to measure the cooling rate, which is essential for clarity and reproducibility. The student provides a thorough background theory section relevant to the research question and explains the choice of techniques for measuring the variables, including a justification for their selections. While the methodology is well-detailed and allows for reproducibility, the student fails to address safety, ethical, and environmental issues related to the investigation, which are important aspects to consider. Additionally, there is a lack of discussion on the choice of the number of trials and measurement precision, which impacts the reliability of the results.
