Exemplars

May 2023
7
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Examiner's summary

Criterion A [1/2]:

The student demonstrates a clear personal interest in the topic by linking the investigation to real-world applications, such as the use of saline water in industrial processes. The aim to explore the effects of fine salt on the specific heat capacity of water reflects curiosity about both scientific principles and practical implications. Additionally, the historical context provided about Joseph Black adds depth to the student's motivation for the research. The student designs an experimental setup, including measurements of salt concentrations and systematic trials to ensure accuracy. The student incorporates multiple trials and accounts for variables such as temperature and energy transfer, showcasing a thoughtful approach to data collection and analysis. The use of a digital balance for accurate measurements illustrates the student's commitment to precision in the investigation.

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Criterion B [5/6]:

The student identifies a focused investigation into the effects of fine salt on the specific heat capacity of water, as evidenced by the clear aim and research question. However, the research question could be more specific by including detailed values for the independent variable and the method for measuring the dependent variable. The physics is explained well, with clear definitions and logical reasoning, and the methodology is presented in a structured format, with clear steps and safety considerations. The student also demonstrates awareness of safety hazards and ethical issues relevant to the procedure. However, the discussion lacks detailed steps on how environmental resources will be conserved or disposed of responsibly, which could be addressed to strengthen the environmental aspect of the methodology.

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Criterion C [0/0]:

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Criterion D [0/0]:

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Criterion E [0/0]:

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