The student provides a focused and detailed description of the main topic, which is the investigation of the relative calcium content of different types of milk that underwent different types of processing. The student also provides a well-organized background information section that explains the key concepts necessary for understanding the investigation. The chemistry of the experiment is clearly explained, and the methodology is appropriate for answering the research question. The student also demonstrates full awareness of safety hazards, ethical concerns, and environmental issues that can arise during the experiment. However, the student could have provided a more pronounced statement of the aim of the investigation in the introduction and added more information on the significance and properties of calcium and/or milk in the background section. Additionally, including a greater variety of controlled variables in the methodology could have improved the experiment.
