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Tuesday, April 19, 2011

Do molecules attract?

All matter is made up of molecules. 

Here's a simple activity to observe if molecules attract.


Materials

  • water
  • container for water (paper cup, etc.)
  • waxed paper
  • dropper
  • pencil





    Directions

    • Use the dropper to place a few drops of water on a piece of waxed paper.
    • Review the meaning of attract (to pull together).
    • Have students predict if the water molecules will attract each other.
    • Use a pencil to push 2 drops of water together. Do this slowly.
    • Observe how the water drops pull together to form one drop.
    • This attraction of molecules is what holds matter together.



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