AC9S5U04 • Year 5 Science
explain observable properties of solids, liquids and gases by modelling the motion and arrangement of particles
Students compare shape, volume, flow, compression and diffusion, then use a particle model to explain why solids, liquids and gases behave differently.
Matter is modelled as particles; state differences arise from particle spacing, arrangement and movement, not from particles changing size.
The model explains fixed shape, flow and compressibility. Particles are not drawn to scale and the spaces are model features, not air between particles.
Use the model consistently and state its limitations. A gas still has mass and occupies space even when invisible.
Learning routine: Observe → Model → Investigate → Analyse → Explain → Evaluate
The model explains fixed shape, flow and compressibility. Particles are not drawn to scale and the spaces are model features, not air between particles.
Use the model consistently and state its limitations. A gas still has mass and occupies space even when invisible.
Now transfer the same relationship to a new situation and justify the result with precise vocabulary.
Content description: explain observable properties of solids, liquids and gases by modelling the motion and arrangement of particles.
Build or examine the visual model for solids, liquids and gases, label the parts and explain the relationship.
Use a controlled comparison, data set or source evidence to test the application and record a cautious conclusion.
Apply the explanation to a new case, identify limitations and propose a next question or design improvement.
Core idea: Matter is modelled as particles; state differences arise from particle spacing, arrangement and movement, not from particles changing size.
Learn from the Topic Guide and fixed Teacher Slides, complete the Practice Sheet, use Practice for supported feedback, then take the Test when ready.
Project the fixed branded slide deck one slide at a time.
Open Classroom ViewThe SkillrHub lesson remains the primary learning resource. This optional video reinforces the explanation; you can complete the lesson and practice without watching.
Before you watch:
American Chemical Society — Watch a classroom demonstration linking the properties of solids, liquids and gases to a particle model.
As you watch: How does the particle model explain why a gas can be squeezed more easily than a liquid?
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Try it: Draw particle models for a solid, liquid and gas; use arrows to show movement, including vibration in the solid.
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Mapped skill: explain observable properties of solids, liquids and gases by modelling the motion and arrangement of particles
These references identify matching or closely related learning. Curriculum sequence, terminology and depth vary, so teachers should use the mapped skill and lesson difficulty to confirm suitability.
| Region | Curriculum framework | Closest level or code |
|---|---|---|
| Australia | Australian Curriculum v9.0 | AC9S5U04 · Year 5 |
| Victoria | Victorian Curriculum F–10 Version 2.0 — Science | VC2S6U03 · Levels 5–6 |
| New South Wales | NSW Science and Technology K–6 Syllabus (2024) | ST3-SCI-01 · Stage 3 |
| United States (USA) | Next Generation Science Standards (NGSS) | Grade 5 |
| Canada (Ontario) | Ontario Curriculum — Science | Grade 5 |
| United Kingdom (England) | National Curriculum in England — Science | Year 6, Key Stage 2 |
| India | NCERT / CBSE — Science | Class 5 |
Australian Curriculum v9.0 is the canonical source for this SkillrHub lesson. Victoria and NSW entries name the closest published state codes or outcomes; international entries are planning references rather than claims of identical curricula.
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Topic reference: AC9S5U04 — AC9S5U04: Explain observable properties of solids, liquids and gases by modelling the motion and arrangement of particles
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