From: Laura Witham (lwnjr@yahoo.com)
Date: Wed Aug 18 2004 - 21:41:41 EDT
Next message: jann: "Re: [Channel-talkchemistry] first day labs"
Dear Loretta,
I would be interested in hearing more about the
mothball observation--could you describe the set-up?
Thank you
Laura Rotondo
Wellesley High School, MA
--- Loretta Ekoniak <loretta@zoominternet.net> wrote:
> Hi everyone
> I love the glue-ball idea for the first day of chem
> class. I've also
> done a similar activity with cornstarch and water
> demonstrating change
> from liquid to solid depending on whether you are
> slowly stirring it or
> sharply hitting it. Also another good observation
> first day is
> mothballs in a tall graduated cylinder with CaCl_2
> and HCl ...then have the students oserve what
> happens ...good
> observation vs inference!
> I've been watching for postings but havent seen any
> new ones since the
> last class in Jan.
> Loretta E
>
>
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