Do you ever wonder why you can only blow so much air into a balloon before the balloon bursts? Or why a volcano erupts and shoots gases, dust, and molten rock high up into the air? This activity will allow you to explore pressure changes similar to these in the safety of your own classroom! Be sure to wear your safety goggles whenever you work with chemical reactions — this activity is a BLAST!


  • Use a computer and a Pressure Sensor to measure your grip strength.
  • See which of your hands has the greater grip strength.
  • Learn what happens to your grip strength as time goes by.
  • Compare your grip strength with your classmates.