Basic Chemistry Terms

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Mixture

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A combination of two or more substances where each retains its own properties and can be physically separated.

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Solution

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A homogeneous mixture composed of two or more substances.

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Reaction

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A process in which substances interact to form new substances with different properties.

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Solid

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A state of matter characterized by particles arranged such that their shape and volume are relatively stable.

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Liquid

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A state of matter with a definite volume but no fixed shape, adapting to the shape of its container.

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Gas

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A state of matter without a definite shape or volume, expanding to fill its container.

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Temperature

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A measure of the average kinetic energy of the particles in a substance.

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Physical Change

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A change in which no new substances are formed and which can often be reversed.

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Chemical Change

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A change that results in the formation of new chemical substances.

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Matter

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Anything that has mass and takes up space.