What will be the amount of sugar in milligrams if the size of the milk chocolate bar is reduced from 12.630 g to 3.000 g ?

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.

It could possibly be beneficial if the experiment is successful.

Conservation efforts have been effective in "increasing the number of endangered species, reducing all the negative impacts of human activity, and preserving wildlife habitats".hope my answer has you : )