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Check it out! Take a different size cookie sheet or other oject that makes
a higher or lower sound and wack it (all other variables constant) and see
if the lines are still there, or closer or further apart...etc. This is a
perfect set up for a fun experiment.

Informal Science Education Network <[log in to unmask]>
writes:
>ISEN-ASTC-L is a service of the Association of Science-Technology Centers
>Incorporated, a worldwide network of science museums and related
>institutions.
>*****************************************************************************
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>
>In an attempt to show that sound vibrations can move objects, I put a bit
> of 
>salt and pepper  on a piece of plastic wrap which was stretched  tight
>over 
>the top of an aluminum can.  I then held a metal cookie  sheet a few
>inches 
>above the wrap, and whacked it with a metal spoon.   Indeed, the salt and
>pepper 
>jumped!
> 
>I then continued to whack the cookie sheet ten more times, and the salt
>and  
>pepper started to line up in rows!  When I was done, I had three or four 
>neat 
>lines of salt and pepper on my plastic wrap.
> 
>Were the salt and pepper bits lining up based on the frequency of the  
>vibrations I was creating?  Or was something else going on?
> 
>Thanks so very much!
> 
>Lisa  
>
>
> 
>Lisa Jo Rudy, Writer/Consultant
>625 Chelten  Hills Drive
>Elkins Park, PA 19027
>_www.lisarudy.com_ (http://www.lisarudy.com/) 
>215-635-9735
>
>
>_About  Guide to Autism_ (http://www.autism.about.com/) 
>
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Deborah Massey
Head of School and Teacher Programs
Rochester Museum & Science Center
657 East Avenue
Rochester, New York 14607-2177
(585) 271-4320, ext. 521
[log in to unmask]

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More information about the Informal Science Education Network and the
Association of Science-Technology Centers may be found at http://www.astc.org.

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