Steph brown : )
chemical change
a change in the identity of substance due to the chemical propeties of that subtance
( you have a new subtance is it reveisible)
http://forums.introversion.co.uk/prisonarchitect/introversion/viewtopic.php?t=19&sta rt=4035
www.corrosionist.com
physical properties
Any charateristic of material that can be observed or measured with out changing the identity or the materrial