Chemical Change

Color:
http://www.youtube.com/watch?v=IGUUjh1Wxxo
Bubble:
http://www.youtube.com/watch?v=AJyS0NSP-aI
Temperature:
http://www.youtube.com/watch?v=8AN_XMcD3yI

Illuminati:

http://www.youtube.com/watch?v=DD6uh01X7Gg&feature=related