On any given night, provided that the sky is clear, all of the planets which can be seen with the naked eye will not be visible at the same time. this is because they all have different

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.