write the difference between physical and chemical changes
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Physical changes only change the appearance of a substance, not its chemical composition.
Chemical changes cause a substance to change into an entirely substance with a new chemical formula.
Chemical changes are also known as chemical reactions. The “ingredients” of a reaction are called reactants, and the end results are called products.
chemical changeA process that causes a substance to change into a new substance with a new chemical formula.
chemical reactionA process involving the breaking or making of interatomic bonds and the transformation of a substance (or substances) into another.
physical changeA process that does not cause a substance to become a fundamentally different substance.
There are two types of change in matter: physical change and chemical change. As the names suggest, a physical change affects a substance’s physical properties, and a chemical change affects its chemical properties. Many physical changes are reversible (such as heating and cooling), whereas chemical changes are often irreversible or only reversible with an additional chemical change.
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