| Lesson Plan |
| Grade: |
Date: 25/02/2026 |
| Subject: Physics |
| Lesson Topic: assess the uncertainty in a derived quantity by simple addition of absolute or percentage uncertainties |
Learning Objective/s:
- Describe absolute and percentage uncertainties and how they are expressed.
- Apply the correct rule to combine uncertainties for addition/subtraction and multiplication/division.
- Calculate the uncertainty of a derived quantity and report the result with appropriate significant figures.
- Solve practice problems involving voltage addition, work calculation, and SHM speed using uncertainty rules.
|
Materials Needed:
- Projector or interactive whiteboard
- Printed worksheet with practice questions
- Calculator or spreadsheet software
- Example data cards (lengths, voltages, etc.)
- Whiteboard and markers
- Ruler or measuring tape for demonstration
|
Introduction:
Begin with a quick demonstration measuring two lengths and asking students how confident they are in the totals. Recall previous work on absolute and relative uncertainties. Explain that by the end of the lesson they will be able to combine uncertainties correctly and present results with proper significant figures.
|
Lesson Structure:
- Do‑now (5') – Short quiz on definitions of absolute and percentage uncertainty.
- Mini‑lecture (10') – Review rules for combining uncertainties with board examples.
- Guided practice (15') – Work through the length‑addition example together, highlighting each procedural step.
- Independent practice (20') – Students solve the three practice questions, using calculators and recording answers on the worksheet; teacher circulates for support.
- Check‑understanding (5') – Whole‑class poll on remaining misconceptions and brief recap.
|
Conclusion:
Summarise the two key rules for adding absolute versus percentage uncertainties and the importance of proper rounding. Ask students to write one takeaway on an exit ticket. Assign homework: complete a set of additional uncertainty problems from the textbook.
|