Info to come!
https://www.nasa.gov/sites/default/files/544372main_PS1_BagBalloon_C1.pdf
https://www.nasa.gov/audience/foreducators/topnav/materials/listbytype/Bag_Ballons.html
https://www.homesciencetools.com/article/how-to-make-a-hot-air-balloon-science-project/
https://cdn2.hubspot.net/hubfs/2781691/Downloads/59614-Hot-Air-Balloon-Teachers-Guide-2018.pdf
https://serc.carleton.edu/sp/mnstep/activities/27149.html
https://www.nasa.gov/audience/foreducators/topnav/materials/listbytype/Bag_Ballons.html
https://www.homesciencetools.com/article/how-to-make-a-hot-air-balloon-science-project/
https://cdn2.hubspot.net/hubfs/2781691/Downloads/59614-Hot-Air-Balloon-Teachers-Guide-2018.pdf
https://serc.carleton.edu/sp/mnstep/activities/27149.html