Lesson 3 - Law of Conservation of Mass

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4 Terms

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Reactants

Substances before the reaction (left of chemical equation)

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Products

Substances after the reaction (right of chemical equation)

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Law of conservation of mass

In a closed system, matter does not enter or leave the environment but change in forms

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Signs of a chemical change

Bubbling/gas, change of colour, temperature change, new substance is formed (e.g solid forming - precipitate), odour change