|physical change|| do not change the type of the matter. |
ex: could be change in mass, vol., density, are size.
|chemical change||the substance present at the beginning of the change are not present at the end; new substance are formed|
|law of conservation matter||matter is conserved> type of atoms does not change|
|law of conservation of mass|| mass is conserved> amount of atoms cannot change|
nothing is created or destroyed