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 Physical changes are changes affecting the form of a chemical substance, but not its chemical composition. Physical changes are used to separate mixtures into their component compounds, but can not usually be used to separate compounds into chemical elements or simpler compounds.Ice melting
Ball deflating
Clay being molded into a new shape
Chopping wood
Melting butter on toast

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Physical changes are those changes in which the composition of the original substance does not change. these changes are usually reversible.
1. melting of ice
2. breaking of glass
3. drying of paint
4. dissolving sugar in water
5. glowing of bulb
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