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Hi Mary,

I have a pretty good one about how to find the center of gravity of  
an odd-shaped flat object.  You can use Masonite and cut it into odd  
shapes and paint the pieces with chalkboard paint.  Drill some holes  
along the edges of the shapes in various places.  Hang a weight from  
a string with a hook above it.  Then hang the shape on the hook and  
draw a line where the shape meets the string.  Turn the shape and  
hang it from a different hole.  Make another chalk line that  
intersects the first.  You can do it a third time.  If you put a  
dowel where all the lines intersect, you should be able to balance  
the shape on the dowel.  Be sure to have people erase their lines so  
someone else can try it.

Good luck!
Anna


On Sep 23, 2008, at 1:28 PM, Mary Catherine Campbell wrote:

> ISEN-ASTC-L is a service of the Association of Science-Technology  
> Centers
> Incorporated, a worldwide network of science museums and related  
> institutions.
> ********************************************************************** 
> *******
>
> I need help in teaching center of gravity / balance concepts to
> elementary students.  I'm looking for ways to demonstrate finding the
> CoG as well as ways that students can display the concept.  Any  
> activity
> ideas or background information would be greatly appreciated.
>
>
>
>
>
> Mary Catherine Campbell
>
> Home School Connections Coordinator
>
> Educational Services Coordinator
> PHONE: 602-716-2000 ext 2556 |  FAX: 602-716-2088
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__________________________________
Anna Grace
Exhibit Coordinator
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Our mission: "We engage people in science experiences that touch all  
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For information about the Association of Science-Technology Centers and the Informal Science Education Network please visit www.astc.org.

Check out the latest case studies and reviews on ExhibitFiles at www.exhibitfiles.org.

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