Science

• Inside the balloon

  1. Air particles move quickly from place to place

  2. Air particles bump into or collide with each other

  3. Air particles collide with the rubber the balloon is made from
• Collisions


  Exert a force on the rubber
• Gas pressure


  The force exerted by the collisions
• Rubber


  • It is stretchy
• Blowing more particles into a balloon


  The balloon expands
• Adding more particles


  Causes more frequent collisions with the walls of the balloon
• More frequent collisions with the walls

  Increases the pressure inside the balloon
• Key words


  • gas pressure
  • collide
  • force
  • particles
  • increases
  • expands
  • collisions