physical and chemical changes
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Answer:
the properties that can be observed and specified like color hardness rigidity crudity density melting point and boiling point effects are the physical properties the interconversion of states in the physical changes because these changes occur without changes in composition and no changes in the chemical nature of the substance all through eyes water and water vapour all look different and displayed friend physical properties they are chemically and same both water and cooking oil are liquid but their chemical characteristic are different
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.