A concept map is a helpful tool that we can use to show the relationship between ideas.

So, here is a concept map of reversible and irreversible changes, showing a variety of changes when substances are mixed, heated or whatever.  It also helps you to use the correct name (term) for a change:

Your task is to follow through each section deciding on the correct term to describe the change that is occurring at that point.

Are you up for the challenge? It'll help you to understand a lot about how different materials behave - honest!