Resources What we'll learn about Find out how air leaving a balloon can be used to power the balloon's travel Discover properties that affect that power Compare different paths of motion.

What you'll need

• At least 100cm of string
• drinking straws
• balloons of all shapes and sizes
• bicycle pump
• measuring tape/yardsticks
• scotch tape
• journals/pens

Getting started

• Set up the string as a guide for the balloons by running it through at least one straw. Secure both ends (use table legs and/or walls).
• Mark distances along the string or set up the measuring tape beside it.
• Make predictions in journals as to which size/shape of balloon will go fastest and farthest.
• Inflate the balloons, tape them to the straws and release, timing their travel and measuring the distance.
• Figure out what you can do to make a balloon move faster, slower, or farther.
• Film and/or photograph balloon motion.
  

What next

Creation and invention:

• Find different ways to observe the balloons' power/travel (i.e. different directions, amounts of air)
  
• Calculate the speed at which the balloons travel
  
• Create a chart of sizes/shapes, speeds, and distances
  
  

Discussion:

• Does it matter if the string is taut or loose?
  
• Is it easier to use the pump or inflate balloons yourself?
  
• How do the different sizes and shapes of balloons compare in terms of speed and distance? Why?
  
• How is the balloon moving?
  

Resources

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