PIRA: 6D30.20


 Lab Equipment  Directions
  1.  2 liter soda bottle with small amount of soap solution
  1.  With your palm over the opening swirl the solution to cover the inside of the bottle, including the opening.
  2. Tip the bottle upright and slide your hand off the opening leaving a thin film across the opening.
  3. Remove the cork from the bottle side and gently blow through the top opening, pushing the bubble down from the neck to the middle of the bottle.
  4. Replace the cork and observe changes in the thin film as time passes.