The student provides a focused and detailed description of the main topic, specifically addressing the calcium carbonate content in eggshells from different bird species. However, the description of the research question lacks clarity and could benefit from rephrasing to enhance focus. While the student includes relevant chemical background, it falls short in contextualizing the significance of calcium carbonate in relation to sustainability. The methodology employed is appropriate and effectively structured to answer the research question, demonstrating a clear understanding of the experimental design and ensuring the validity of the results. The student also shows a comprehensive awareness of safety, ethical, and environmental issues related to the experiment.
