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A prerequisite knowledge graph of 1590 learning concepts across 8subjects. Track what you've mastered and see exactly what you're ready to learn next — the topics whose prerequisites you've already met. Built on the Marble Open Skill Taxonomy.

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Reversible Changes

Science · Matter & Materials · conceptual

Demonstrate that dissolving, mixing, and changes of state are reversible changes where no new materials are formed

What mastery looks like

  • Define a reversible change as one where the original materials can be recovered
  • Give at least three examples of reversible changes: melting, freezing, dissolving, evaporating
  • Explain how to reverse each example (e.g. freeze melted chocolate, evaporate a solution)

Check your understanding

Can Reversible Changes explain that melting chocolate or dissolving sugar can be undone — you can get the original material back — because these are reversible changes?