16. References Animationfactory.com Matter and Its Properties: Exploring Phases of Matter. United Learning (1999). Retrieved September 3, 2007, from unitedstreaming: http://www.unitedstreaming.com/ Properties of Matter, Part 1and 2. 100% Educational Videos (2003). Retrieved September 3, 2007, from unitedstreaming: http://www.unitedstreaming.com/ Real World Science: Matter: Solids, Liquids, and Gases. AIMS Multimedia (2000). Retrieved September 3, 2007, from unitedstreaming: http://www.unitedstreaming.com/