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Chemistry lesson plan: Balancing chemical equations

Topic: Balancing chemical equations and conservation of mass (HS-PS1-7). Adjust the settings, then copy the prompt.

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Planning notes for this lesson

Prerequisite skills to check: reading chemical formulas and subscripts; atoms and molecules (MS-PS1-1); mass is conserved in chemical reactions (MS-PS1-5).

Key vocabulary: reactant, product, coefficient, subscript, conservation of mass, chemical equation.

Warm-up idea: Show steel wool burning on a balance (live or on video) and ask why the mass goes up instead of down.

Exit ticket idea: Students balance two equations and use atom counts to explain why the mass of the reactants equals the mass of the products.

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