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physical change

noun, Chemistry.
a usually reversible change in the physical properties of a substance, as size or shape:
Freezing a liquid is a physical change.
Compare chemical change. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Contemporary definitions for physical-change

any process involving a substance's change from one state (gas, liquid, solid) to another without alteration of the chemical composition; cf. chemical change


Freezing water is a physical change because both water and ice are H2O.

See chemical change's 21st Century Lexicon
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