Properties and Changes of Matter

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physical property

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

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physical change

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A change in a substance that does not involve a change in the identity or composition of the substance.

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chemical property

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

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chemical change

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A change that produces matter with a different composition than the original matter.

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pure substance

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any material that consists of only one type
of matter (an element or a compound)- every particle is the same

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mixture

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A combination of two or more substances that are not chemically combined. The combination of two or more substances that are physically combined in a changeable ratio

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heterogeneous mixture

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A mixture in which the composition is not uniform throughout.

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homogeneous mixture

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A mixture in which the composition is uniform throughout.

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element

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A pure substance made of only one kind of atom.

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atom

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The smallest particle that makes up an element and is capable of chemical interactions.