8. What are two physical changes that cooling a hot substance may result in?

Explanation:

Two possible changes are

a phase change. If water is presented in the form of steam, it may change into  liquid, or eventually into a solid. While in a phase change, the temperature might change.a temperature change. Water at 65o what cooled can go down to 5o. There is no phase change, but there is a temperature change.

They are like other investigations? say there was a murder u have to do blood test and finger prints which run through a lab.