If you let go your balloon in air, Where would it go?

Video recordings of my weather balloon project in Holderness School, NH 2006th www.seungjoo.net



http://www.youtube.com/watch?v=lxX7YxslgSU&hl=en

Thanks To : Flights from thailand and Airline Tickets easy tour and travel riveiew Travel Guidebook Series foxnews-2009