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Chemical Reactions: Evidence and Particle Change

Annotate signs of reaction, reactants, products, particle rearrangement, closed system, temperature measurement and conservation of mass. Distinguish observation from explanation.

Key stage

Key Stage 3

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Science

Time

~5 min

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Free

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Colouring Sheets

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Annotate signs of reaction, reactants, products, particle rearrangement, closed system, temperature measurement and conservation of mass. Distinguish observation from explanation.

Use the parent guidance on page 2. Print on A4 paper at actual size or fit to printable area, then encourage careful colouring and discussion of the learning topic.

Use the guidance and answer key on page 2. Answer or assessment rubric: Possible observations include gas production, precipitate, temperature change and colour change; none alone identifies every reaction. Particle models should show atoms rearranged into products, not created or destroyed. In a closed system total mass is conserved even when a gas forms.

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