chemical and physical changes

there is a difference between physical and chemical changes.
the physical change is a change in the appearance of the matter without changing its internal structure while in the chemical change, the structure and the appearance of the matter are changed.
a lot of examples for the physical changes in our daily life like cutting wood, cutting paper, melting of a candle,melting of chocolate and freezing of water.
while burning of sugar, making a cake, fermentation of bread and digestion of food are clear examples for the chemical changes.
finally you should know, the physical change is reversible while the chemical change is inreversible.

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