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From:
Paul Orselli <[log in to unmask]>
Reply To:
Informal Science Education Network <[log in to unmask]>
Date:
Wed, 16 Jan 2008 17:29:26 -0500
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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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Hi Alissa,

Here's something else to consider in addition to where to get real  
(or facsimile) teeth:

Will an experiment of submerging "teeth" into various liquids  
actually demonstrate what you want, and in a way that is interesting  
to visitors?

The reason I ask is that my 12 year old son is just concluding such  
an experiment using his old baby teeth (my wife saves all our kids'  
baby teeth --- don't ask me why, but it came in handy this time!)  
submerged in test tubes containing Coke, Diet Coke, Mott's Apple  
Juice, and Water.  After three weeks the teeth in the soda pop have  
lost just a few hundredths of a gram each --- barely noticeable.  (I  
was really surprised, since I've always heard that a tooth dropped  
into a bottle of soda would dissolve overnight.  At this point, I'd  
say that's bunk.) Coke sure stains teeth, but dissolves them?

The liquid in the tubes has discolored and gotten cloudy, but  
basically this approach strikes me as a big snore as either a class  
activity or as an exhibit.  Aside from all the time factor issues (no  
visitor is going to see anything actually happen)  You might as well  
introduce a "paint drying" and/or "ice melting" display as well from  
an excitement standpoint! ;-0

My two take-aways from this that might be useful from an exhibit  
standpoint:

1) Tooth enamel is really tough, even again sugary stuff, and

2) You can purchase very nice, brand new, digital scales suitable for  
museum use, accurate to hundredths of a gram on EBay for around ten  
bucks!

----------------------------------------------------------

Paul Orselli, President and Chief Instigator

Paul Orselli Workshop (POW!)
1684 Victoria Street
Baldwin, NY  11510

<http://www.orselli.net>

(516) 223-1043  voice
(516) 238-2797  mobile

You don't subscribe to the ExhibiTricks blog?
<http://exhibitricks.blogspot.com/>







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