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Unit 10: Electricity                                                                   Page 21

               slide and then touch something                     name "Ghost Poop"... ) Rub

               grounded (like your mom).                          packing peanuts with wool or your
                                                                  hair to build up a strong, quick
               You steal electrons and take on a                  static charge. Stick the stryfoam to
               negative charge when you scuff                     the wall to spell out words. How

               along the carpet in socks.                         long do they stay attached to the
               Remember that just like magnets,                   wall? Does humidity matter? (Try
               ‘like’ charges (negative-to-negative               spritzing with a light mist of
               or positive-to-positive) repel, and                water).
               opposite charges (negative-to-
               positive) attar, which is why you                  Expt. 8: Static Bubbles Blow a
               can make your hair stand up on                     few big, round bubbles (use store-
               end by scuffing around a lot. The                  bought bubble solution, or make
               hairs all become negative, trying to               your own with 12 cups cold water
               get as far away from each other as                 and 1 cup clear Ivory dish soap
               they can.                                          and a wire coat hanger stretched

                                                                  into a diamond shape). Chase your
               Expt. 6: Electric Tail Feathers                    bubbles with a charged balloon -
               Cut a sheet of tissue paper into 12                what happens? Try the comb
               thin strips, about 1/2" wide and 8-                rubbed with wool - which works

               12" long. Straighten out a wire                    better? What other two things can
               coat hanger (snip off the hook                     you use to change the path of the
               part), or find yourself a 10g piece                soap bubble?
               of metal uninsulated wire. Tape the
               strips to the end of a wire coat                   Expt. 9: Fluorescents
               hanger (make sure your coat                        Unplugged In a dark room, rub
               hanger do not have plastic                         the length of a fluorescent bulb
               insulation around it - use                         with a piece of plastic wrap (or
               sandpaper to sand off any clear                    polyethylene bag or wool sweater)

               enamel if you're not sure). Attach a               vigorously and then pull your arm
               piece of plastic with tape or clay to              away - the bulb should light up
               the center of the rod, making a V-                 momentarily. What other materials
               groove so the handle sits better on                cause it to glow?
               the wire. Bring a very charged
               balloon near the end of the wire -                 Why do these experiments
               what happens?                                      work?


               Expt. 7: Ghost Words (Although                     The triboelectric series is a list
               this experiment has also held the                  that ranks different materials



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