About: http://webisa.webdatacommons.org/421344652

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	One way of describing the characteristics of a pure substance is by its chemical properties.?? Physical change is a change in the physical properties of matter.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com