The student provides a focused and detailed description of the main topic, explaining the investigation of the effect of increasing Fe (III) concentration on the growth of duckweed in terms of change in the number of leaves over 5 days. The research question is also present. The background information provided is relevant and focused, giving an extensive introduction to the concepts explored in the study. The biology of the experiment is well-explained, including the biology of duckweed and the significance of iron for plants. However, the student only includes the alternative hypothesis and should also include the null hypothesis. The methodology of the investigation is highly appropriate to the topic, as the student measures the change in the number of leaves of the duckweed plant over time and plots it on a scatter plot to determine the impact of iron chloride concentration on the growth of duckweed. The methodology correctly identifies the independent and dependent variables and includes appropriate steps to assure the relevancy and validity of the obtained results. However, the student should label their consideration of environmental issues more clearly. Overall, the student demonstrates a good understanding of the criteria.
