Is a measure of how closely packed particles of
matter are in a certain amount of space.

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.

Butterfly wingspan is 7.7

The answer is b because a,c,and d are opinons

Idon't know hope someone you