I'd love to find this lost video again!  Bonus points to anybody who finds it. 
        Possible key words are:  diffusion, dye, potassium permanganate (the name of the dye),
        bunsen burner, heat, & cold

   C.    Diffusion rates in two Petri dishes -- The ANSWERS
http://video.yahoo.com/video/play?p=diffusion+-music+-rock&toggle=1&cop=&ei=UTF-8&b=4&oid=cd22586105db12aa&rurl=lbs.bw.schule.de&vdone=http%3A%2F%2Fvideo.yahoo.com%2Fsearch%2Fvideo%3Fp%3Ddiffusion%2B-music%2B-rock%26toggle%3D1%26cop%3D%26ei%3DUTF-8

                  What are the three errors in the scientific method that are shown?
                  (1)    When heating the liquid, he fails to _ WEAR SAFETY GLASSES/GOGGLES_
                  (2)    When placing the twin Petri Dishes, he places the Kalt (cold) dish
                                _ (SWITCHED LOCATION)  FIRST ON THE RIGHT, THEN FINALLY
                                 ON THE LEFT__
                  (3)    When adding the dye pellets, he does not _ ADD THEM AT THE SAME TIME _

a    In this demonstration, the independent variable is _ WATER TEMP   _

b    In this demonstration, the  dependent variable is _ RATE OF DYE DIFFUSION  __

        c    To which Petri dish was heat added?                   _HOT FINALLY ON RIGHT _

                   d     In which Petri dish did the molecules move faster?     _____ HOT ______

                   e     In which Petri dish did molecules diffuse faster?         ___ HOT _____

                   f     A general relationship is that the  _ GREATER _ the heat, the _FASTER_ 
                         molecules  move,  the _ GREATER__  the rate of diffusion.

 

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