Basic Concepts of Matter

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Matter

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Anything that has mass and takes up space.

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Substance

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A single kind of matter that always has a specific makeup, or composition.

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Physical Property

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A characteristic of a pure substance that can be observed without changing it into another substance.

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Chemical Property

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A characteristic of a substance that describes its ability to change into a different substance.

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Atom

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Basic unit that makes up all matter.

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Element

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Substances that are only 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.