3 Chemical and material behaviour
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3.1 Particle models |
| recognise obvious examples and properties of solids, liquids and gases using a simple model or analogy | explain the grouping of materials into solid/liquid/gas categories with reference to their properties, and use this to describe simple evidence for the existence of gases, e.g. smell
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| explain the grouping of everyday materials into solid/liquid/gas categories with reference to their properties, recognising that changes of state are reversible changes and dependent on temperature | describe and carry out a range of separation techniques, such as filtration or distillation, in familiar contexts
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| justify their own classification of some ‘difficult’ materials, e.g. toothpaste, soap powder
| describe changes of state in terms of a particle model
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