This lesson covers spec points 4.8P, 4.9P and 4.10P — describing particle arrangement and motion in solids, liquids and gases, and explaining heating curves in terms of kinetic and potential energy.
PowerPoint includes:

Retrieval starter reviewing changes of state and particle theory from prior learning
Direct Instruction (I Do) — particle models for all three states, energy changes during heating explained clearly
Guided Practice (We Do) — heating curve analysis worked through as a class
Independent Practice (You Do) — exam-style questions including heating curve interpretation
Misconception check on particle size during expansion
Review and Reflect exit ticket

Activity Sheet includes:

6 exam-style questions using Edexcel command words
Embedded heating curve diagram (water, ice to steam) with labelled sections A→E for students to interpret
Completion table linking graph sections to particle behaviour and energy changes
Stretch question on kinetic and potential energy during boiling
Full mark scheme for teacher use

This lesson is part of the complete Unit 4 resource pack, available separately at a discounted bundle price.