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: Janeen.Laborde (Janeen.Laborde@maps.k12.wi.us)
Date: Wed Jun 18 2003 - 09:38:10 EDT

  • Next message: Carol Smith: "[Channel-talkchemistry] Workshop 4 problem"

    When we discuss solutions, the class of course tells me 50ml +50 ml = 100ml.
    I show them that 50ml of water + 50 ml of alcohol does not = 100ml. We
    discuss why. I have a student measure out 50 ml of marbles in a plastic
    grad. cyl. I have a second student measure out 50 ml of small glass beads
    in another cylinder. We then pour the beads into the marbles and mix....of
    course the volume is less than 100 ml. This allows the students to see how
    different molecules take up various amounts of space. Depending on the
    class dynamics, we discuss polarity at this time too.

    --Janeen LaBorde
    Chemistry Teacher
    Merrill High School
    Merrill WI

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