Thermal Conductivity Exploration

Year Group

Year 10 (ages 14–15)

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National Curriculum Links

Key Stage 4 Science – Physics: Energy

• Pupils should be taught about:
  • Different methods of energy transfer by conduction, convection, and radiation
  • The concept of thermal conductivity of materials and how this relates to their uses

(Reference: National Curriculum for England – Science Programmes of Study – Key Stage 4 – Physics – Energy)

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Lesson Duration

60 minutes

Class Size

25 students

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Learning Objectives (WALT)

• WALT: Understand and explain thermal conductivity as a method of heat transfer through materials
• WALT: Identify materials with different thermal conductivities and explain suitability for different uses
• WALT: Conduct a practical investigation to compare the thermal conductivity of various materials

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Success Criteria

Students will be able to:

• Define thermal conductivity and distinguish it from other methods of heat transfer
• Categorise materials as conductors or insulators based on their properties
• Correctly carry out and record results from a thermal conductivity experiment
• Explain why certain materials are used in everyday objects due to their thermal conductivity

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Resources Needed

• Metal rods (e.g., copper, aluminium, iron) and wooden/plastic rods for comparison
• Heat sources (e.g., water baths or hot plates with temperature controls)
• Thermometers or digital temperature probes
• Stopwatch or timer
• Heatproof gloves and safety equipment
• Worksheets summarising definitions and instructions
• Dyslexia-friendly reading sheets with clear fonts (e.g., OpenDyslexic font or Comic Sans) and coloured overlays
• Whiteboard and markers
• Visual aids such as diagrams/images of heat transfer methods
• Interactive quiz software or printed quiz sheets

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Lesson Breakdown

1. Starter (10 minutes)

• Activity: Engage pupils by showing contrasting images of items like a metal saucepan and a wooden spoon.
• Discussion: “Why is a metal pan used to cook food but a wooden spoon is used to stir it?”
• Present WALT and success criteria clearly on the board.
• Recap briefly different methods of heat transfer, focusing attention toward conduction. Use visual aids.

2. Explanation/Instruction (10 minutes)

• Define thermal conductivity: "The rate at which heat passes through a material."
• Explain the difference between conductors and insulators.
• Discuss real-life examples: cooking utensils, thermal clothing, house insulation.
• Use a chart showing thermal conductivity values for common materials.
• Dyslexia-friendly reading handout distributed summarising this definition and examples.

3. Practical Activity (25 minutes)

• Investigation: Measuring Thermal Conductivity
• Pupils work in groups of five (5 groups): each group receives one metal rod and one wooden/plastic rod.
• Set up experimental apparatus: one end heated, use thermometers to measure temperature rise at the far end over time.
• Students record temperature change every 1 minute for 5 minutes.
• Compare results for different materials.
• Group discussion to analyse data: Which material conducted heat faster? Why?

4. Plenary and Application (10 minutes)

• Groups share their results with the class.
• Teacher draws conclusions linking back to WALT and success criteria.
• Interactive quiz or quick-fire questioning to recap key terms and concepts.
• Highlight everyday material choices based on thermal conductivity.

5. Extension and Homework (5 minutes)

• For advanced learners: Research and present on materials with extreme thermal conductivity (e.g., diamond, aerogels). Propose new applications in industry using these materials.
• For others: Write a short paragraph explaining why buildings are insulated and what materials might be used for this purpose.
• Dyslexia-friendly summary sheets given to all for home revision.

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Differentiation Strategies

• Visual and kinaesthetic learners: Use diagrams, experimental apparatus, and hands-on activities.
• EAL (English as an Additional Language) learners: Simplified vocabulary handouts with images.
• Students with Dyslexia: Dyslexia-friendly reading materials, multi-sensory learning, coloured overlays if needed, and oral instructions supplemented by texts.
• Lower ability learners: Provide partially completed data tables and sentence starters.
• Higher ability learners: Encourage hypothesis formulation before experiments and in-depth data analysis including rate calculations.

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Assessment

• Formative: Teacher observes group discussions and practical skills during the experiment.
• Summative: Quick quiz at plenary assessing understanding of thermal conductivity and related vocabulary.
• Homework paragraph to assess applied understanding.

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Teacher Reflection Notes

• Time management for practical could be tight; prepare apparatus in advance.
• Encourage collaborative discussion to deepen scientific reasoning.
• Monitor safety carefully during heating activities.
• Use technology (digital probes, if available) to engage tech-savvy students.

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This lesson plan combines investigative work, conceptual understanding, and differentiation, all closely aligned with the National Curriculum for England for Year 10 Physics energy topics, ensuring both engagement and rigour.