During a change of state, matter changes from one physical form to another. Changes of state are cause by a transfer of energy. Though the energy of a substance changes, the identity of the substance does not change. You can change the state of a substance by adding or removing energy. Adding energy causes the particles of a substance to move more quickly. Removing energy causes the particles of a substance to move more slowly. Changes of state does not affect mass of energy. Mass and energy cannot be created or destroyed. Changes of state are condensation, evaporation, and sublimation.
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