Methods scientists use to determine if a change is chemical or physical?

It if it chemical they can see if it formed solid or gas. For physical Shape, temperature and finally color can be a sign of both physical and potentially a chemical change.

Hope that is what they were looking for. Good luck and I hope this helps :)

smooth muscle is composed of involuntary muscles found within the walls of organs and structures such as the esophagus, stomach, intestines, and blood vessels. those muscles push materials like food or blood through organs. unlike skeletal muscle, smooth muscle can never be under your control.

that's what i got you can count the number of atoms