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How do you measure helium?



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The activity can be viewed at: How Heavy Is Your Air?

Hello,
This is a great activity! For this project, it is not necessary to precisely measure the amount of helium in the balloon; the main objective is to measure the rate at which each balloon falls to the ground. Balloon A has purely carbon dioxide gas, while Balloon B has a combination of gases that make up the air we breathe.
Hope this helps!
Carissa