Atoms and Molecules: http://edinformatics.com/interactive_molecules/mmpart1_jmol.htm
Solids, Liquids, Gases: http://www.chem.purdue.edu/gchelp/liquids/character.html
Solids, Liquids, Gases: http://www.harcourtschool.com/activity/states_of_matter/
Solids, Liquids, Gases: http://www.bbc.co.uk/schools/scienceclips/ages/9_10/gases_fs.shtml
Interactive Quizes: http://www.softschools.com/quizzes/chemistry/
Changing Matter: http://www.bgfl.org/bgfl/custom/resources_ftp/client_ftp/ks3/science/changing_matter/index.htm
Solids, Liquids, Gases: http://www.chem.purdue.edu/gchelp/liquids/character.html
Solids, Liquids, Gases: http://www.harcourtschool.com/activity/states_of_matter/
Solids, Liquids, Gases: http://www.bbc.co.uk/schools/scienceclips/ages/9_10/gases_fs.shtml
Interactive Quizes: http://www.softschools.com/quizzes/chemistry/
Changing Matter: http://www.bgfl.org/bgfl/custom/resources_ftp/client_ftp/ks3/science/changing_matter/index.htm