Changes of state: energy and evaporation
I can describe and explain what happens when a substance changes state and how evaporation occurs.
Changes of state: energy and evaporation
I can describe and explain what happens when a substance changes state and how evaporation occurs.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- States of matter can have differing amounts of energy.
- Solid states have the least energy, gas states have the most energy.
- A substance in its liquid state can evaporate at temperatures below its boiling point.
- The hotter the water, the more quickly it evaporates.
- Water evaporates at temperatures that are lower than 100℃.
Keywords
Energy - Particles gain or lose energy when a substance changes state.
Evaporation - When a particle of a substance in the liquid state at the surface, has enough energy to change to the gas state and mix with air.
Evaporation rate - The evaporation rate is a measure of how quickly a substance evaporates.
Alcohol - Ethanol is a type of alcohol that has a higher evaporation rate than water.
Common misconception
Evaporation only occurs above the boiling point of a substance.
Give examples of substances other than water.
To help you plan your year 7 science lesson on: Changes of state: energy and evaporation, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 7 science lesson on: Changes of state: energy and evaporation, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
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The assessment exit quiz will test your pupils' understanding of the key learning points.
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Explore more key stage 3 science lessons from the Solid, liquid, gas states and changes of state unit, dive into the full secondary science curriculum, or learn more about lesson planning.
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Starter quiz
6 Questions



Exit quiz
6 Questions
