videos1

making nylon: http://www.youtube.com/watch?v=y479OXBzCBQ&feature=related high-density polyethylene(HDPE): http://www.youtube.com/watch?v=xoBYLwwjr9E polyethylene terephthalate (PET): http://www.youtube.com/watch?v=29Az-dPwtg8&feature=channel testing saturated/unsaturated hydrocarbons: http://www.youtube.com/watch?v=2C_6ax2TsV8&feature=related