Learner name: ______________________________

Examination number: ________________________

Using Heating and Cooling Curves to Explain Changes of State in a Local Water-Use Context

Submission details

• Submission date: 30/10/2026
• Report length: 5-10 pages (including cover page and references)
• Time available: One month
• Working arrangement: Individual

Research project Details

Your community relies on water for farming, household work and other daily activities. Water changes state when it is heated or cooled, and these changes can be explained using heating and cooling curves. Your project is to investigate the states of matter and to construct a heating curve and a cooling curve for a safe, teacher-approved sample linked to one teacher-confirmed local example. You must use your own honest observations and measurements. Do not invent results. Choose only one local context, such as a water-use or farming situation, and confirm it with your teacher before you start.

Instructions

• Work individually on this project.
• Confirm your chosen local context with your teacher before you start writing.
• Use only safe, teacher-approved samples and apparatus. If an essential item is missing, tell your teacher before starting.
• Record all measurements and observations honestly. Never invent, copy or alter results.
• Cite any printed reference information you use.
• Keep a dated contribution log as you work.
• Follow all safety rules for heating and cooling.

Required work

• A dated individual contribution log with at least four entries.
• A completed safety check note approved by your teacher before any heating or cooling.
• A reference list of any printed reference information used.
• A completed rubric self-check with brief evidence notes.

Resources

• Paper and pen
• Ruler
• Recording sheet
• Clean labelled sample containers
• School-approved apparatus and samples for the safe heating and cooling investigation, including a thermometer and a safe heat/cool source as confirmed by the teacher
• Printed reference information for offline use

Task safety

• Teacher approval and supervision are required before any heating or cooling.
• Use heat-resistant gloves or tongs for hot containers; do not touch hot surfaces.
• Keep water and samples away from electrical sockets and leads.
• Tie back long hair and loose clothing near a heat source.
• Handle glassware and thermometers carefully; report breakages at once.
• Do not taste or inhale samples.
• Wash hands after handling samples or apparatus.
• If using ice or salt, avoid prolonged direct skin contact.

Project requirements

Submit your project work, evidence and project logbook.

• Research and explain the states of matter: solids, liquids, gases and plasma. Include the basic units that make up matter and give local examples of each state. Use your chosen local context to show why knowing the states of matter is useful.

• Design a safe investigation to obtain heating and cooling curve data for a teacher-approved sample. State your aim, the sample you will use, the variable you will change, the variables you will keep the same, the variable you will measure, the apparatus, the safety steps, and the blank data tables you will use.

• Carry out the investigation and record your temperature-time data honestly for the heating stage and the cooling stage. Construct a neat, labelled heating curve and a neat, labelled cooling curve using your data. Label the axes with quantity and unit, and mark any plateaus.

• Analyse your heating and cooling curves. Identify any plateaus and explain what is happening to the particles during those sections. Use your research on states of matter to explain the state changes shown in your curves. Link your explanation to your chosen local context.

• Evaluate your project. Discuss how reliable your data were, at least two limitations, at least two improvements, and a conclusion that answers your project question. State whether your evidence supports your explanation of changes of state in the local context.

Project roadmap

• Confirm local context and research states of matter and basic units.
• Plan a safe heating and cooling investigation and prepare blank data tables.
• Carry out the investigation and record honest temperature-time data.
• Plot and label the heating curve and the cooling curve.
• Analyse the curves and explain state changes using particle ideas.
• Evaluate the method, write a conclusion and submit the report with logbook.

Evidence / logbook

• Date: What did I plan or research today, and why?
• Date: What did I measure or observe today, and what problems did I meet?
• Date: What evidence did I produce today, and how does it help answer the project question?
• Date: What will I do next, and what help do I need?

Keep dated observations and individual contribution records in your logbook.