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Education Concept Tracker

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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Conservation of Mass

Science · Matter & Materials · conceptual

Measure and provide evidence that the total weight of matter is conserved regardless of the type of change (heating, cooling, or mixing)

What mastery looks like

  • State the principle that matter is neither created nor destroyed during physical or chemical changes
  • Describe an investigation weighing materials before and after a change to show mass is conserved
  • Explain why dissolved sugar still contributes to the total weight even though it can't be seen

Check your understanding

If Conservation of Mass dissolves sugar in water, can they explain why the total weight of the water and sugar stays the same even though the sugar seems to disappear?