Criterion A: The choice of the topic is justified through apparent personal significance, interest, or curiosity

Comment: 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.

Criterion A: Evidence of personal input and initiative in the designing, implementation, or presentation of the investigation is present

Comment: To strengthen this student's personal input and initiative, they are advised to further conduct a preliminary experiment to see if this collected information is applied to the design and implementation of this investigation. The student is advised to include the description of the preliminary experiment and their reflection on any methodological issues present in the original version of the experimental procedure and correct them to minimize the possibility of errors. The student is advised to dedicate a preliminary experiment section prior to the Methodology section.

Criterion B: A focused and detailed topic of the investigation is identified

Comment: The student identifies the topic in the IA with the title "Investigating the effects of fine salt on the specific heat capacity of water." In the Introduction, the student articulates the research question: "How does the concentration in (g/ml) of fine salt (NaCl) in water influence the solution’s specific heat capacity in (J/kg°C)?" This shows an understanding of the investigation's aim and the relationship between the independent and dependent variables.

Criterion B: A relevant and fully focused research question is clearly described

Comment: While it identifies the independent variable (concentration of fine salt in water) and the dependent variable (specific heat capacity), it has lack of specific values for independent variable and method for measuring the dependent variable. To make the research question more specific and focused, the student should be revised as:"How does the concentration of fine salt (NaCl) in water, ranging from 0.1 g/mL to 1.0 g/mL, influence the solution's specific heat capacity (J/kg·°C), as measured using a calorimeter at room temperature (25°C) under constant pressure?". This revision provides detailed values for the independent variable, specifies the measurement method, and includes the experimental conditions, ensuring the question fully meets the criteria.

Criterion B: The physics is explained well enough for the reader to fully and easily understand it without the need of rereading

Comment: The physics is explained well for the reader to understand it without the need of rereading. The student provides a clear definition of specific heat capacity and explains the relationship between salt concentration and heat capacity using logical reasoning. The student supports the hypothesis with theoretical explanations, including how salt affects molecular motion in water. The student outlines the experimental setup and calculations, facilitating an understanding of the processes involved. Additionally the student provide a diagram that help the reader.

Criterion B: The physics is explained well enough for the reader to fully and easily understand it without the need of rereading

Comment: The physics is explained well for the reader to understand it without the need of rereading. The student provides a clear definition of specific heat capacity and explains the relationship between salt concentration and heat capacity using logical reasoning. The student supports the hypothesis with theoretical explanations, including how salt affects molecular motion in water. The student outlines the experimental setup and calculations, facilitating an understanding of the processes involved. Additionally the student provide a diagram that help the reader.

Criterion B: The methodology of the investigation is clear and easy to follow

Comment: The methodology of the investigation is presented in a structured format, with headings for each section, including Variables, Experimental Setup, and Apparatus. The student details each step in the experimental process, such as preparing solutions, measuring temperatures, and collecting data. Specific instructions, like ensuring a consistent water volume and using a digital balance for measurements, contribute to the ease of following the methodology.

Criterion B: The methodology of the investigation is clear and easy to follow

Comment: The methodology of the investigation is presented in a structured format, with headings for each section, including Variables, Experimental Setup, and Apparatus. The student details each step in the experimental process, such as preparing solutions, measuring temperatures, and collecting data. Specific instructions, like ensuring a consistent water volume and using a digital balance for measurements, contribute to the ease of following the methodology.

Criterion B: The methodology of the investigation is clear and easy to follow

Comment: The methodology of the investigation is presented in a structured format, with headings for each section, including Variables, Experimental Setup, and Apparatus. The student details each step in the experimental process, such as preparing solutions, measuring temperatures, and collecting data. Specific instructions, like ensuring a consistent water volume and using a digital balance for measurements, contribute to the ease of following the methodology.

Criterion B: The methodology of the investigation is focused on addressing the research question

Comment: The student outlines a clear methodology to investigate the impact of fine salt on the specific heat capacity of water. The IA includes defined steps, such as preparing solutions with varying concentrations of NaCl and utilizing a calorimeter setup to measure temperature changes. The student details the calculation of specific heat capacity using relevant equations, demonstrating a focused approach to addressing the research question. The inclusion of controlled variables strengthens the methodology, ensuring consistency throughout the experiments

Criterion B: The methodology of the investigation includes steps to assure the relevance and reliability of the collected data

Comment: The methodology includes steps such as controlling variables, raw data collection, and processed data calculations to ensure the relevance and reliability of the collected data. The use of control variables and raw data collection from multiple trials enhances the reliability of the investigation. Additionally, The student provides a methodology for the investigation, ensuring the relevance and reliability of the collected data. The student outlines steps for preparing solutions, such as using a digital balance to weigh salt and ensuring a consistent volume of water in each trial. The student describes the use of a magnetic stirrer to create homogeneous solutions, which helps maintain consistency in the experimental setup. The student details the process for measuring and recording temperature changes, along with the measures taken to account for energy losses.

Criterion B: The methodology of the investigation includes steps to assure the relevance and reliability of the collected data

Comment: The methodology includes steps such as controlling variables, raw data collection, and processed data calculations to ensure the relevance and reliability of the collected data. The use of control variables and raw data collection from multiple trials enhances the reliability of the investigation. Additionally, The student provides a methodology for the investigation, ensuring the relevance and reliability of the collected data. The student outlines steps for preparing solutions, such as using a digital balance to weigh salt and ensuring a consistent volume of water in each trial. The student describes the use of a magnetic stirrer to create homogeneous solutions, which helps maintain consistency in the experimental setup. The student details the process for measuring and recording temperature changes, along with the measures taken to account for energy losses.

Criterion B: The methodology of the investigation includes steps to assure the relevance and reliability of the collected data

Comment: The methodology includes steps such as controlling variables, raw data collection, and processed data calculations to ensure the relevance and reliability of the collected data. The use of control variables and raw data collection from multiple trials enhances the reliability of the investigation. Additionally, The student provides a methodology for the investigation, ensuring the relevance and reliability of the collected data. The student outlines steps for preparing solutions, such as using a digital balance to weigh salt and ensuring a consistent volume of water in each trial. The student describes the use of a magnetic stirrer to create homogeneous solutions, which helps maintain consistency in the experimental setup. The student details the process for measuring and recording temperature changes, along with the measures taken to account for energy losses.

Criterion B: The methodology of the investigation is focused on addressing the research question

Comment: The student outlines a clear methodology to investigate the impact of fine salt on the specific heat capacity of water. The IA includes defined steps, such as preparing solutions with varying concentrations of NaCl and utilizing a calorimeter setup to measure temperature changes. The student details the calculation of specific heat capacity using relevant equations, demonstrating a focused approach to addressing the research question. The inclusion of controlled variables strengthens the methodology, ensuring consistency throughout the experiments

Criterion B: The student shows full awareness of safety hazards that can arise during the procedure

Comment: The student correctly identifies safety hazards, such as the need to wear rubber-isolated shoes while conducting the experiment and not touching the circuit while the power supply is on. These precautions demonstrate the student's awareness of potential dangers related to electric current.

Criterion B: The student shows full awareness of the ethical issues that are relevant to the procedure

Comment: The student demonstrates awareness of ethical issues relevant to the procedure by stating, "Special care will be allocated to not waste unnecessary water and salt resources as well as paper sheets." This shows consideration for resource conservation during the experiment. The student highlights safety measures, such as wearing enclosed rubber-isolated shoes and not touching the circuit while the power supply is on.

Criterion B: The student shows full awareness of environmental issues that are relevant to the procedure

Comment: The discussion lacks detailed steps on how these resources will be conserved or disposed of responsibly. The student should include specific methods for minimizing waste and ensuring sustainable practices. For example: clearly outline the disposal process for saltwater solutions to prevent environmental contamination, highlight recycling efforts for materials like paper or aluminum containers, and provide details on how the water usage will be optimized during the experiment. These additions would ensure the criteria are fully met and strengthen the environmental aspect of the methodology.

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