Oxygen animation
http://www.privatehand.com/flash/oxygen.html
Interactive Periodic Table: www.rsc.org/Chemsoc/VisualElements/pages/pertable_fla.htm
Lesson plan resource: http://www.middleschoolchemistry.com/lessonplans/
(check multimedia for animations and a great search by grade/state)
Matter Webquest http://sciencespot.net/Media/statesofmatter.pdf
http://www.chem4kids.com/files/matter_intro.html
Under a car hood: https://www.youtube.com/watch?v=e9vfMrjitXw&feature=youtube_gdata&app=desktop