| Lesson Plan |
| Grade: |
Date: 25/02/2026 |
| Subject: Chemistry |
| Lesson Topic: Describe the uses of alloys in terms of their physical properties, including stainless steel in cutlery because of its hardness and resistance to rusting |
Learning Objective/s:
- Describe how alloying alters physical properties such as hardness and corrosion resistance.
- Explain why stainless steel’s hardness and rust‑resistance make it ideal for cutlery.
- Identify common alloys and match each to its typical applications.
- Analyse the role of the chromium‑oxide layer in preventing rust on stainless steel.
- Apply knowledge to evaluate material choices for everyday objects.
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Materials Needed:
- Projector and screen
- Printed handout of alloy table
- Sample stainless‑steel cutlery (or high‑resolution images)
- Worksheet with matching activity
- Whiteboard and markers
- Exit‑ticket slips
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Introduction:
Begin with a quick question: “What material is your fork made of and why isn’t it pure iron?” Connect to prior knowledge of metals and their properties. State that by the end of the lesson students will be able to describe key alloy properties, explain why stainless steel is used for cutlery, and match alloys to real‑world uses.
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Lesson Structure:
- Do‑now (5'): Students list familiar metals and predict why cutlery needs a different material.
- Mini‑lecture (10'): Definition of alloys, reasons for alloying, overview of physical properties (hardness, strength, corrosion resistance).
- Group activity (12'): Using the handout, groups match alloys to typical uses and justify their choices.
- Case study – stainless steel (10'): Discuss composition, chromium‑oxide layer, and its relevance to cutlery; show diagram.
- Demonstration (5'): Examine a stainless‑steel fork, discuss hardness and rust resistance.
- Check for understanding (8'): Quick quiz or exit‑ticket question on key properties.
- Summary & reflection (5'): Teacher recaps objectives and students share one new insight.
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Conclusion:
Recap the link between alloy composition, physical properties, and everyday applications, emphasizing stainless steel’s hardness and rust resistance for cutlery. Students complete an exit ticket writing one property that makes stainless steel ideal for cutlery. For homework, each student researches another alloy, its key property, and a real‑world use to share next class.
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