Theodor Gray
http://periodictable.com/
copyright Febuary 9, 2010
found October 12, 2010
Mark R.Leach
Meta-synthesis
http://www.meta-synthesis.com/webbook/31_matter/matter.html
copyright 1999
found October 11, 2010
New york times
Chemical and physical change
http://chemistry.about.com/od/lecturenotesl3/a/chemphyschanges.htm
copyright 2010
found October 12, 2010
Russel and Young-Hsee
The planet earth
http://library.thinkquest.org/28327/html/universe/solar_system/planets/earth/interior/layers_of_earth.html
copyright 1999
found October 12, 2010
No comments:
Post a Comment