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BBSCI #2 part 3 mysterious moustache

This one does not require a lot of equipment. The hardest part is making a copy 
 
of a picture of the MONA LISA. If that is not available the name
could be changed to a picture of someone that you can easily find.
The markers require some testing so that you are using three different
water based markers (permanent ones should NOT be used). Try different black 
markers. Put a dot of the marker on a strip of chromatography paper( strips of  

coffee filters about 1/2" to 3/4" wide are fine). You should put each dot about 
 
an inch up from the bottom of the paper. Then
Follow kids directions to separate colors. Some have more blues, some more 
yellows, some more purples etc. Pick the three that you are going to use.
Cut three strips for each child that is going to do the experiment and label 
strips A, B ,and C with PENCIL (this will not separate when the water hits it)  

On each of Strip A put the dot of the first black 
marker, on each strip of B put the dot of the second marker and on Strip C with 
 
the third marker.
This is the most time consuming step, but I did it at the end of lunch for 140  

kids so I know it is not too bad.
The cut a rectangle in the mouth area of the Mona Lisa (or other picture) and 
back it with a strip of filter paper like the ones the kids are using. Then 
draw your BEST MOUSTACHE with One of the markers.
(LABEL all of the three markers A, B, and C.) After the kids bring in their 
homework , you can separate the colors of the moustache and
compare it to the markers of the three criminals. (you can give them names if 
you want) The Strip with the marker that matches the moustache will surely 
reveal the criminal. The only real trick is to choose three
markers in the beginning that have distinctive colors when they separate.
This can lead to discussions of police work, the work of scientists who
observe and match samples etc. 
The kids have a great time with this one and there is a bit of suspense
left until the next day when the 'Criminal' is revealed.
As always, your comments and results are welcome.
Have Fun!



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