Snap Crackle Hop An edible activity on static idea adapted from Snap Crackle Jump

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Snap Crackle HopAn edible activity on
staticidea adapted from Snap Crackle Jump

• by Samantha Brooks

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Introduction

• How many of you have ever had a hair raising
  experience?
• By a hair raising experience, I dont mean what
  happens when you watch a really scary movie. I
  mean a real hair raising experience caused from
  static.
• In this activity we will learn more about static.

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Overview

• Cereal appears to leap and hover from the top of
  a table to the bottom of overlying plexiglass
  which has been rubbed with wool to generate a
  negative charge.
• This activity should be used as a follow up
  after a lesson on atoms and can be completed
  individually, in small groups, or in a whole
  group setting.

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Equipment

• hand full of Rice Krispies
• plate of plexiglass, foot squared in
  measurement
• wool, rabbit fur, felt, silk
• wooden blocks or other non-conductive material
  
• to balance the plate about 1-3 inches above
  the
• table
• The table must be non-metallic.

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Make a Prediction!!!
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How to do the experiment

• 1. Put a pile of Rice Krispies on the surface
  of the table.
• Set the wooden blocks on the table. Balance the
  plexiglass above the table and the pile of Rice
  Krispies on the wooden blocks.
• Briskly rub the top side of the plexiglass with
  the wool.
• The Rice Krispies will slowly begin to stand on
  end, then leap from the table to the plexiglass
  and back.

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Explanation

• outcome caused by buildup of static charge
• wool rubbed on plexiglass produces a net negative
  charge on the plexiglass
• net negative charge has the effect of polarizing
  the Rice Krispies on the table, therefore
  positive charges move to the points closest to
  the above plate which is negatively charged
• unlike charges attract, and despite gravity the
  Rice Krispies jump to the plexiglass
• charges dissipate because there is no further
  means of attraction

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Extension

• What other materials could be tested?
• Try these and give your observations.
• Would you get the same results if the height of
  the plexiglass was adjusted?
• Try this and give your observations.

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Additional Information

• For additional information on this topic, click
  on the following links
• http//www.sciencemadesimple.com/static.html
• http//community.discovery.com/groupee/forums/a/tp
  c/f/9701967776/m/2831943808
• http//www.amasci.com/miscon/curstat.html
• http//www.mywiseowl.com/articles/Static_electrici
  ty
• http//www.pei.org/static/
• http//www.jci.co.uk/ControlStatic.html

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Mississippi Framework

• Fourth Grade
• 9.b. identify and explore forms of energy such
  as heat, sound, light, or electricity
• Sixth Grade
• 10.b. investigate forms of energy such as heat,
  sound, light, or electricity

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Assignment

• Use a piece of computer paper to make a poster to
  show the steps you took to make a static charge.
  Fold the paper in half (hamburger style, 2
  times). You now have 4 equal sections. In each
  section show a step of the activity. Be sure to
  include an explanation and labels.