About: http://webisa.webdatacommons.org/147130236

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	The light material floats to the top while the heavy elements, such as iron and nickel, sink to the center of the planet.
http://www.w3.org/ns/prov#wasQuotedFrom	phys.org