What mass of aluminum oxide will form when 15.0-g of oxygen combine with excess aluminum in a combination reaction that is 85.0% efficient?
4 Al + 3 O2 → 2 Al2O3

Yes it would be a physical change.

Ithink that the use of creativity in the sciences entails that one produce something out of nothing or from another thing. with this, i think that the he wrote down his results as four parts of the atomic theory is the manifestation of the  creativity of john dalton.