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physical change

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A physical change alters the form or appearance of matter but does not turn any substances in the matter into a different substance.

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chemical change

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A chemical change is a change in matter that produces one or more new substances or a chemical reaction.

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Law of Conservation of Mass

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The Law of Conservation of Mass states that matter is not created or destroyed in any chemical or physical change.

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Matter

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Anything that has mass and takes up space

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Solubility

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How easily a substance dissolves in another substance, such as water

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Atom

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The basic unit from which all matter is made

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Elements

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Substances that are made up of only one type of atom

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molecule

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A group of two or more atoms held together by chemical bonds

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compound

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A substance made of two or more elements that are chemically combined in a set ratio

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mixture

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Made up of two or more substances that are together in the same place, but their atoms are not chemically combined