It's a physical change. A physical change is when an object can return back to it's previous state, etc. If it was a chemical change, the object would not be able to return back to it's previous shape, state or size, etc.
Answer:
Physical
Explanation:
chemical
Means its structure has completely changed- it is not the same hunk of stuff that it was before, at least atomically.
nuclear
Only deals with (mainly) radioactive elements, whether it be something changing them or it changing that something.
Physical-
Deals with visible changes, such as shape, size, color, or state of matter.
Phase-
A phase is where a material is at right now.
Atomic-
Same with chemical, this would mean a whole change in element.
