Lesson Plan

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Lesson Plan
Grade: Date: 17/01/2026
Subject: Physics
Lesson Topic: Describe the differences between boiling and evaporation
Learning Objective/s:
  • Describe how boiling differs from evaporation in terms of location, temperature, and visual signs.
  • Explain the energy requirements and rate factors for each process.
  • Apply the concepts to predict effects of pressure, surface area, and humidity on boiling and evaporation.
Materials Needed:
  • Projector or interactive whiteboard
  • PowerPoint slides with diagrams of boiling and evaporation
  • Sample beakers of water and a hot plate for demonstration
  • Thermometer
  • Worksheet with comparison table
  • Whiteboard and markers
 Introduction:
Begin with a quick demonstration of a kettle heating water to capture students' curiosity. Ask learners what they notice about the water before it bubbles and after it starts boiling, linking to prior knowledge of phase changes. Explain that by the end of the lesson they will be able to clearly differentiate boiling from evaporation and justify real‑world examples.
Lesson Structure:
  1. Do‑now (5'): Students list everyday examples of water disappearing and discuss in pairs. (Check understanding)
  2. Mini‑lecture with slides (10'): Define boiling and evaporation, highlight key differences using the comparison table.
  3. Classroom demonstration (10'): Heat water on a hot plate, observe bubbling, then let a shallow tray of water evaporate; students note observations.
  4. Guided activity (10'): Complete worksheet comparing the two processes, focusing on temperature, location, energy, and rate factors.
  5. Quick quiz (5'): Exit ticket – one short question asking students to state one condition that favors evaporation over boiling.
Conclusion:
Summarise the main distinctions: boiling occurs throughout the liquid at its boiling point with visible bubbles, whereas evaporation is a surface phenomenon at lower temperatures. Ask each student to write one real‑life example of each process on a sticky note as an exit ticket. Assign homework to research how altitude affects boiling point and report findings.