Teacher resources and professional development across the curriculum

Teacher professional development and classroom resources across the curriculum

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Sub Image2:Macro to Micro Structures
1) Atoms and Molecules2) Macro to Micro Structures 3) Energetics and Dynamics 4) Theory and Practice in Chemical Systems 5) Chemical Design 6) The Chemistry of Life 7) Chemistry and the Environment 8) Chemistry at the Interface
From: raemont@optonline.net
Date: Thu Feb 06 2003 - 18:52:30 EST

That's a great idea. Thanks so much.

----- Original Message -----
From: Steve Gustafson <sgustafson@glidden.k12.wi.us>
Date: Thursday, February 6, 2003 1:28 pm
Subject: Re: [Channel-talkchemistry] program 2

> Suggestion for the ziplock bag lab: I have my students put the liquids
> together in a small regular sandwich bag which they then stuff
> into the
> zoplock bag without spilling. Then they invert the whole thing and
> squeezeout the liquid from the inside bag. You don't need quick
> reactions and if
> the ziplock doesn't work just right, it doesn't matter.
> Steve G.
> on 2/3/03 9:19 PM, raemont@optonline.net at raemont@optonline.net
> wrote:
> > We use a different activity to start discussions about chemical
> reactions that
> > has worked well for us. The students do a quick experiment
> where they combine
> > water, bromthymol blue, sodium bicarbonate and calcium chloride.
> They make
> > observations of all four substances before they begin. They
> they combine the
> > two solids in a plastic ziplock baggie, and make observations.
> They combine
> > the two liquids in a beaker, and make observations, and finally
> add the
> > liquids to the solids in the ziplock and quickly seal it. Heat
> is generated,
> > gas is produced as well as a great color change from blue to
> yellow. After
> > making all their observations, students are then told to
> determine exactly
> > which combination of substances produces each change they
> noticed. The kids
> > seem to like it and it really gets them talking about what is
> occurring.>
> > Would love any suggestions.
> >
> > Rae
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