
KS3 · Science
Particle Model Explanation
1Total points: 70
Rubric type: Analytic rubric
This rubric evaluates a written or spoken explanation of the properties of solids, liquids and gases, gas pressure, and changes of state using the particle model. It assesses scientific accuracy, explanations of causes, use of evidence and communication at Key Stage 3 level.
2Criterion 1
Weight: 14%
States of Matter
14%
• Solid, liquid and gas particles are shown or described with their spacing, arrangement and movement.
• Fixed shape, fixed or changing volume and ability to flow are linked to the particle arrangements.
• Forces of attraction are compared between the three states.
11%
• Solid, liquid and gas particles are shown or described.
• Shape, volume and flow are linked to particle arrangements, but one property is missing or incorrectly linked.
• Forces of attraction are compared for two states only.
8%
• Two states are shown or described using particles.
• One correct property of shape, volume or flow is linked to particle arrangement.
• Forces of attraction are stated for one state without a comparison.
5%
• One state is shown or described using particles.
• A property of shape, volume or flow is stated without a particle explanation.
• Forces of attraction are not compared.
2%
• A state of matter is named without a particle description.
• Shape, volume and flow are not linked to matter particles.
• Forces of attraction are not mentioned.
3Criterion 2
Weight: 14%
Gas Pressure
4Criterion 3
Weight: 14%
Changes of State
5Criterion 4
Weight: 14%
Energy Patterns
6Criterion 5
Weight: 14%
Scientific Communication