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A chemical reaction is where one or more substances change to make another substance(s).

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A precipitate is a solid that is made by a chemical reaction .

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An  exothermic reaction is a chemical reaction where heat is released.

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An  endothermic reaction is where a chemical reaction needs heat to work.

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A chemical reaction written in symbols like H20.

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The law that mass can't be taken away by a normal chemical or physical change.

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The things that make up a chemical reaction.

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The end of a chemical reaction, the final form of the two reactant.