The student provides a focused and detailed description of the main topic, clearly stating the aim of the experiment to determine the effect of changing the concentration of sucrose on the volume of carbon dioxide produced. They also provide relevant background information on brewing fermentation that contributes to the reader's understanding of the topic. The student explains the science behind yeast fermentation well enough for the reader to easily understand it without the need for rereading. The methodology used in the investigation, including the use of a CO2 sensor, is highly appropriate to the topic and focused on 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 null hypothesis is not stated, which could be improved.
