The student clearly states the independent variable as the temperature of the copper (II) sulphate solution and the dependent variable as the adsorption of copper ions, demonstrating a solid understanding of the research question. However, the student fails to describe the method of analysis in the posed research question, which could enhance clarity. The background theory is well-developed, covering relevant concepts such as the chemical structure of eggshells and the Beer-Lambert Law, while the choice of techniques for measurement is explained effectively. The methodology is detailed and reproducible, although the student does not adequately address safety, ethical, or environmental issues associated with the investigation, which are important for a comprehensive assessment.
