Examples of Physical Changes:crumpling a sheet of paper,melting an ice,cubecasting silver in a moldbreaking a bottle
Examples of Chemical: Changesburning wood
A physical change is any change NOT involving a change in the substance's chemical identity. Here are some examples: (1) any phasechange. Moving between solid, liquid and gas involves only the amount of energy in the sample (this amount is the subject of future lessons).
Chemical change is any change that results in the formation of newchemical substances. At the molecular level, chemical changeinvolves making or breaking of bonds between atoms. These changesare chemical: iron rusting (iron oxide forms) gasoline burning (water vapor and carbon dioxide form)