Final answer:
Physical changes are reversible changes in matter where the form changes but not the composition. Examples include the melting of ice and dissolution of salt in water which can both be reversed.
Step-by-step explanation:
In Chemistry, a physical change is essentially a type of change in which the form of matter, but not its composition, is altered. Physical changes are typically reversible where the matter can return to its original state. An example of a reversible physical change is the melting of ice. If ice is heated, it changes to liquid water, but if the water is cooled, it can revert back to the ice form which demonstrates the reversibility of the process. Another example would be the process of dissolving salt in water. When salt is added to water it dissolves but if you were to evaporate the water, the salt would remain, returning to its original state.
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