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Changes of state
| 11–14 years
Everything you need to teach changes of state
Prepare
ResourceStudents’ ideas about changes of state | Beyond appearances
Changes in state need changes in thinking to be understood, explore how to support learners to develop a new way of seeing state changes
ResourceImprove graph skills for chemistry
A diagnostic exercise, practical and worksheet to assess and boost students’ grasp of graphing
Deliver
Class experimentMelting and freezing stearic acid
In this class practical students take the temperature of stearic acid at regular intervals as they heat and cool it. Includes kit list and safety instructions.
ResourceMelting and boiling | Johnstone’s triangle worksheets | 11–14 years
Develop learners’ understanding of melting and boiling with this worksheet, including a teacher demonstration for learners to observe
ResourceMelting and boiling points | Developing understanding | 11–14
Deepen understanding of melting and boiling points and how these are represented at different conceptual levels of thinking
ResourceChanges of state | Structure strip | 11–14 years
Use scaffolded prompts to support learners to write about changes of state
PosterEvaporation in action
Boost your 11–14 students’ knowledge and understanding of separation techniques with this poster, fact sheet and practical activity
PosterThe science of melting chocolate
Use this infographic with your 11–14 students to develop their knowledge of changes of state and their graphing skills
Enrich
Class experimentRate of evaporation
Use this class practical to measure and compare the rate of evaporation of propanone under different conditions
ResourceSalt (for cooking) activities | 11–14 years
Uncover the properties and health implications of salt in our diets
ResourceMaking ice | In Search of More Solutions | 11–14 years
Explore the properties of water and ice in this planning activity
Overview resources for Particle model | 11–14 years
Discover more chemistry teaching resources to engage 11–14 learners with the particle model