Harper Cooper——Studied at the University of Cambridge, Lives in Cambridge, UK.
The key with physical changes is that they are --easily-- reversible. There are many simple examples of physical changes, like melting ice (solid water) to liquid then boiling of water turning liquid to steam (gaseous water).read more >>
QuesHub is a place where questions meet answers, it is more authentic than Quora, but you still need to discern the answers provided by the respondents.