If matter can only change form through physical and chemical changes, where does all the matter we get rid of when losing weight end up in?

Question

If matter can only change form through physical and chemical changes, where does all the matter we get rid of when losing weight end up in?

In: 65

Answer 1

Just as a technicality matter(mass) can also convert to energy. This is not relevant for the process you describing, but very much means that matter doesn’t just change from one form to another.