7 December Science 7 Experiments with Hot Air Balloons


  1. Find the mass of your balloon (grams). Find the weight (Newtons).
  2. Estimate the volume of your balloon (cubic centimeters, liters).
  3. What is the height of the ceiling in the HOP?
  4. How much work is done on your balloon as it lifts from the floor to the ceiling? (Remember work is force x distance. The force of lifting the balloon up must equal the force pulling the balloon down–gravity–weight?)
  5. What are all the energy transformations–remember that any form of energy involves the capacity to do work?
  6. How could you determine the density of air at room temperature?
  7. What is your explanation for why the balloon flies?
  8. How could your idea be tested?
  9. Take material and equipment to the gym.
  10. 2 experiments from Dr. F. What do you think?
  11. Each group propose an experiment and try.

Everyone focuses. Everyone helps. No distracting or off-task behavior.

If you need something to do while waiting:

  1. Get your digital science notebook complete and up to date.
  2. Examine links and references from previous blogposts on energy and hot air balloons.
  3. Find out more about the history of ballooning and science: http://www.pbs.org/wgbh/nova/space/short-history-of-ballooning.html
  4. Prepare for in-class writing summative assessment for Tuesday. See previous blog for questions.

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