| Lesson Plan |
| Grade: |
Date: 25/02/2026 |
| Subject: Physics |
| Lesson Topic: Describe the pressure and the changes in pressure of a gas in terms of the motion of its particles and their collisions with a surface |
Learning Objective/s:
- Describe how particle collisions with container walls generate pressure.
- Explain how temperature, volume, and amount of gas affect pressure using particle‑motion concepts.
- Apply the ideal‑gas relationship to predict pressure changes when variables are altered.
- Identify and correct common misconceptions about gas pressure.
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Materials Needed:
- Projector and screen
- Whiteboard and markers
- Printed diagram of gas particles colliding with walls
- Worksheet with practice questions
- Calculators
- Gas syringe (or syringe demo) for a hands‑on illustration
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Introduction:
Begin with a quick demonstration of a sealed syringe being compressed to show a pressure increase. Ask students what they think causes the rise in pressure, linking to prior knowledge of force and area. Explain that today they will explore how invisible particle motion creates pressure. Success will be measured by their ability to predict pressure changes when temperature, volume, or amount of gas is varied.
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Lesson Structure:
- Do‑now (5'): short quiz on the definition of pressure and the formula p = F/A.
- Mini‑lecture (10'): introduce the particle model and how collisions produce pressure; display the diagram.
- Interactive simulation (10'): students manipulate temperature, volume, and moles to observe pressure changes.
- Guided practice (10'): worksheet questions on qualitative effects and calculations using pV = nRT.
- Misconception check (5'): discuss common errors and have students correct statements.
- Summary & exit ticket (5'): each student writes one sentence explaining pressure in terms of particle collisions.
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Conclusion:
Recap that pressure arises from particle collisions and is influenced by temperature, volume, and amount of gas. For the exit ticket, students state the particle‑level reason for a pressure change. Assign homework to complete additional problems applying the ideal‑gas equation to real‑world scenarios.
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