I always liked the "guinea feather" demonstration -- in a vacuum, a
feather will fall at the same speed as a coin (the "guinea" part of the
name I remember from jr. high school science class)

Dale
--
"Curiosity is the very basis of education and if you tell me that
curiosity killed the cat, I say only the cat died nobly."
          - Arnold Edinborough


On Tue, 21 May 2002, Lawrence Lile wrote:

> Tomorrow I have to put on a show for some first grade 7 year olds in my lab.
> In the past, I trotted out this old vacuum chamber that we never use for
> anything else.  I usually boil some room temperature water in it, then take
> it out and drink it down, put a small ballooon in it and watch it get big
> under vaccuum, and the like.  This time I'm thinking about putting a candle
> flame inside and watching it go out.
>
> I'm trying to think of some other cool things one can do in a modestly
> equipped lab that impress first graders.  Without maiming any of the little
> rugbiters.

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