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Line 1: − A change in which the [[atom]]s or [[molecule]]s in a substance stay the same.<ref>Wile, Jay L. ''Exploring Creation With Chemistry''. Apologia Educational Ministries, Inc. 1998.</ref>+ − − Some examples include changes in the state of matter: melting ([[solid]] to [[liquid]]), evaporation ([[liquid]] to [[gas]]) and [[sublimation]]. Many times, dissolution is also a physical change, such as when [[salt]] is dissolved, as the [[water]] can be evaporated. − − ==References== − − − [[Category:Physics]]
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