The density of water is 1 g/cm3(1 gram per cubic centimeter); using this fact as a reference & Table c , how would you determine if an object sinks or float

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.