The student does not clearly state the independent and dependent variables in the research question, which affects the clarity of the investigation. Additionally, the method of analysis is not explicitly mentioned in the research question, and the choice of techniques for measuring the variables lacks sufficient explanation. The sampling technique is not adequately described, and there is no discussion regarding the number of trials and their precision. However, the student successfully identifies safety, ethical, and environmental issues associated with the investigation, and provides a detailed methodology that allows for reproducibility. Overall, while some aspects are well addressed, there are significant areas for improvement in clarity and justification throughout the investigation.
