The student clearly describes how the data was obtained and processed, ensuring each procedural step is easily understood. They conducted an experiment to measure the mass of a petri dish with and without caffeine, presenting the results in a table and the observations in the qualitative data section. The analysis and discussion section provides a detailed analysis of the results, including the calculation of mass of caffeine, average and standard deviation values, and a graph presenting the results. The document also includes clear considerations of the impact of uncertainties on the data and results, demonstrating a thorough understanding of how uncertainty can affect the validity of results. Additionally, the student conducts relevant data processing that accurately addresses the research question, providing clear and useful insights into the caffeine content of various tea brands. However, the student is recommended to include the unit used to express the mass of caffeine at the end of the equation and to incorporate additional variables/trials to ensure that at least 25 data points are being investigated in order to ensure a full point for this subcriterion.
