Solid, liquid, gas states and changes of state
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Threads
Why this why now
This unit builds on pupils’ prior learning from Introduction to states of matter and changing states, where they explored how solids, liquids, and gases change when heated or cooled. It develops their understanding of the particle model, focusing on how particles behave and interact during changes of state, including gas pressure and motion. This positions pupils to deepen their knowledge in the next unit, Solutions, where they will apply these concepts to understand the behaviour of mixtures and how they can be separated, further reinforcing the thread of substance interactions.
Prior knowledge requirements
- Materials can be grouped as solids, liquids or gases.
- Solids hold their shape.
- Liquids form a pool not a pile.
- Gases can escape from an unsealed container.
- Some materials change state when they are heated or cooled.
- Water can evaporate into a gas.
- Water evaporates more quickly when the temperature is higher.
- Water vapour can condense into water.
Threads
Why this why now
This unit builds on pupils’ prior learning from Introduction to states of matter and changing states, where they explored how solids, liquids, and gases change when heated or cooled. It develops their understanding of the particle model, focusing on how particles behave and interact during changes of state, including gas pressure and motion. This positions pupils to deepen their knowledge in the next unit, Solutions, where they will apply these concepts to understand the behaviour of mixtures and how they can be separated, further reinforcing the thread of substance interactions.
Prior knowledge requirements
- Materials can be grouped as solids, liquids or gases.
- Solids hold their shape.
- Liquids form a pool not a pile.
- Gases can escape from an unsealed container.
- Some materials change state when they are heated or cooled.
- Water can evaporate into a gas.
- Water evaporates more quickly when the temperature is higher.
- Water vapour can condense into water.
Chemistry
Solid, liquid, gas states and changes of state
This unit covers the properties of solids, liquids, and gases using the particle model, including gas pressure. It explains changes of state in terms of the particle model while developing skills in using appropriate techniques, apparatus, and materials in lab work.
7 lessons in unit
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