B3. Chemical Changes Vocabulary

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Evidence

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Information that supports an idea.

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Change

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To make or become different.

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Substance

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A form of matter that is the same throughout and has specific properties.

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Chemical Change

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A change that alters the identity of a substance, resulting in new substances with different properties.

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Chemical Reaction

Back

A process in which substances combine to make one or more new substances.

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Physical Change

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A change that affects one or more physical properties of a substance without altering its chemical composition.

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Reactants

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The starting substances in a chemical reaction.

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Products

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The substances formed as a result of a chemical reaction.

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Chemical Property

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A characteristic of a substance that can only be observed during a chemical reaction.

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Physical Property

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A characteristic of a substance that can be observed without changing its identity.