From: William (exhibits@catawbascience.org)
Date: Fri May 23 2003 - 15:33:43 PDT
Message-ID: <01C32159.D6F82B20.exhibits@catawbascience.org> From: William <exhibits@catawbascience.org> Subject: RE: Fwd: Volcano Demonstration Question Date: Fri, 23 May 2003 18:33:43 -0400
Kay & Madeliene
I believe the sodium bicarbonate mixture one was the standard "kids" model
demo that was done when I was going through school. It doesn't give you a
good explosion but it does give you a continuous "lava" flow. Any acid and
base will do, but vinegar and baking soda are the standard.
http://www.sunsationalkids.com/scienprojvol.html
or....(not sure about the following link....
www.columbuslibrary.org/cmlscif/searchresults.cfm?searchterm=348&type=b -
28k -
www.volcano.und.nodak.edu/vwdocs/frequent_questions/grp13/question1509.html
Of course to make it explode a bit more....simply make sure it's all in a
central tube, and cap the tube with something (a really small version
could use those little plastic containers film comes in). A great cap
would probably be something like a dried red sugary compound. Hmmm....if
you really wanted to do that type of cap you could probably use a
hypodermic needle (into the cap) to insert the vinegar onto the baking
soda...or use a small container in the base that mixed when you shook
it...that way you could "paste" the cap into place...that one would take a
fair amount of finesse though...
Do a Google search of "baking soda volcano science project" and you'll
probably see a long list....
-William
William Katzman "The important thing is to never stop
questioning." -A. Einstein
Director of Exhibits "Are you sure about that Al?" -His wife.
Catawba Science Center
ph: (828) 322-8169 x307
fax:(828) 322-1585
exhibits@catawbascience.org
-----Original Message-----
From: Kay Lancaster [SMTP:kay@fern.com]
Sent: Friday, May 23, 2003 12:41 AM
To: webhead-l@eskimo.com
Cc: pinhole@exploratorium.edu; brendanjwatson@yahoo.com
Subject: Re: Fwd: Volcano Demonstration Question
On Thu, 22 May 2003, John or Jan Lahr wrote:
> >hello Madeleine, i am a mid-high school science teacher working in Nth
> >Sumatra, in Indonesia. One of our lower school classes is doing a
> >'vulcanos' topic at present, and are building a model for such. I
> >wanted to show them the 'real' thing, with a small explosion and
> >over-flow of 'lava' from the crater.
The old faithful demo when I was a kid used the thermite reaction,
but it's not exactly safe.
http://jchemed.chem.wisc.edu/JCESoft/CCA/CCA1/R1MAIN/CD1R1870.HTM#1870
http://chemed.chem.purdue.edu/demos/main_pages/5.3.html
Ammonium dichromate is another common demo; again, not something
you want kids to try hands-on, most likely, as chromium compounds
are commonly classed as carcinogenic.
http://www.chem.uiuc.edu/clcwebsite/ammvol.html
http://chemistry.about.com/cs/demonstrations/a/aa033003a.htm
http://www.chem.ox.ac.uk/vrchemistry/FilmStudio/volcano/HTML/page01.htm
Sugar and sulfuric acid might do in some circumstances, but again,
demo only:
http://www.chem.leeds.ac.uk/delights/animations/sugar.html
I spotted this one, from the UK -- the red candle wax doesn't
sound spectacular, but it's got some good pedagogic points:
http://www.earthscienceeducation.com/handouts/
The%20Dynamic%20Rock%20Cycle.pdf
Thinking out loud... how about sodium bicarbonate and a
mixture of a thickener like carageenan or methylcellulose and
vinegar or other dilute acid, plus food color, if this is going
to be a hands on activity?
Kay Lancaster kay@fern.com
This archive was generated by hypermail 2.1.3 : Mon Aug 04 2003 - 16:18:13 PDT