Lesson Plan

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Lesson Plan
Grade: Date: 25/02/2026
Subject: Chemistry
Lesson Topic: Describe the uses of metals in terms of their physical properties, including: (a) aluminium in the manufacture of aircraft because of its low density (b) aluminium in the manufacture of overhead electrical cables because of its low density and good e
Learning Objective/s:
  • Describe how the low density of aluminium makes it suitable for aircraft structures.
  • Explain why aluminium’s combination of low density and conductivity is advantageous for overhead power lines.
  • Identify the corrosion‑resistant properties of aluminium that allow its use in food packaging.
  • Compare copper’s high conductivity and ductility and justify its use in electrical wiring.
Materials Needed:
  • Projector and screen
  • Whiteboard and markers
  • Printed worksheet with property‑use matching
  • Sample aluminium foil and copper wire
  • Handout of the summary table
  • Quiz cards for exit ticket
 Introduction:
Begin with a short video showing an aircraft wing and power lines, prompting students to consider why these structures are made of aluminium. Recall prior knowledge of density and conductivity from previous lessons. Explain that today’s success criteria are to link specific physical properties of metals to real‑world applications.
Lesson Structure:
  1. Do‑now (5'): Students match metal properties to uses on a worksheet.
  2. Mini‑lecture (10'): Teacher presents key properties of aluminium and copper using slides and the summary table.
  3. Demonstration (8'): Show aluminium foil and copper wire, discuss corrosion resistance and ductility.
  4. Group activity (12'): Teams analyse case studies (aircraft, power lines, food cans, wiring) and create a brief justification poster.
  5. Whole‑class discussion (8'): Groups share findings; teacher highlights correct links.
  6. Formative check (5'): Quick exit ticket – list one property and its corresponding use for aluminium and copper.
Conclusion:
Summarise that the choice of metal in engineering depends on matching physical properties to functional requirements. Ask students to write one example of a metal and its property on an exit slip. For homework, assign a short research task to find another everyday product that uses aluminium or copper and explain why.