A chemical compound contains exactly the same proportions by mass regardless of sample size or source. * 5 points

Matter- occupies space and possesses rest massno matter is the opposite

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.