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Here's how to make a very quick watershed model.  This is a 
build-in-place project rather than a take-home one.

You need a square foot or so of kitchen aluminum foil, some light 
(colorless) corn syrup, blue food coloring, a small cup, some glasses 
or food  cans or desk items like a stapler or tape dispenser, a tray 
with a lip.

Mix a few tablespoons of corn syrup with enough food coloring to make 
it nicely blue.  Crumple the foil a bit and drape it over the cans or 
glasses or desk items.  Put that assembly on a tray. You're making a 
landscape that isn't totally flat.  I was born in prairie country, so 
I need reminding.

Start pouring the blue corn syrup somewhere near the high point of 
the foil.  Pour rather slowly.  Is a lake forming somewhere?  Where 
does the blue, sticky stuff flow?  How can you change the underneath 
supports to make different sorts of watersheds?

You could clean up by tossing the foil and goo, or you could make a 
blue pudding with milk and cornstarch and eat the remains.

Best from Jane


-- 
Jane Snell Copes	  Science Outside the Box 
www.scienceoutsidethebox.com        651-357-3316 (cell)

Science Outside the Box is a tiny business that celebrates the 
scientist in every one of us.  I am a writer and teacher, and I have 
fun with science every single day.  I'm especially fond of designing 
classes and science magic shows for kids and parents.


Science questions?  Ask Professor Sepoc:  [log in to unmask]

"To be an inventor, you need a good imagination and a big pile of 
junk."  Edison

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