Conversation so far:
what are some different ways that you can make a physical change to a piece of string
what are some different ways that you can make a physical change to water
Some examples of physical changes in water include boiling it and freezing it
what constitutes a physical change
A physical change is a type of change in which the form of matter is altered but one substance is not transformed into another.

Question: can the changes be reversible
Self-contained rewrite: can changes be reversible in a physical change