Unit 2: Chemical Reactions

Front

Physical property

Back

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

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Physical change

Back

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

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Chemical property

Back

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

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Chemical change

Back

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

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Density

Back

The mass of a substance per unit volume.

Front

Significant figures

Back

The digits in a measurement that are known with certainty plus the first digit that is uncertain.

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Matter

Back

Anything that has mass and takes up space.

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Solid

Back

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

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Liquid

Back

A state of matter with a definite volume but no definite shape.

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Gas

Back

A state of matter without a definite shape or volume.