The student did not clearly state the independent and dependent variables in the research question, as the concentration of sodium bicarbonate was omitted, leading to ambiguity. Additionally, the research question lacks a description of the analytical method for measuring the rate of photosynthesis, which should include specific details such as the duration of observation. There is also insufficient explanation regarding the choice of techniques for measuring the variables and the rationale behind selecting the sodium bicarbonate concentrations. Furthermore, while the student mentions conducting five trials, there is no discussion on this choice or the implications for data reliability. Overall, while the student demonstrates understanding in areas such as controlled variables, safety, ethics, and methodology, the clarity and completeness of the research question and related explanations require improvement.
