In learning about the Properties of Matter, we made floating lanterns. We made them by lighting up candles with fire and attaching it under a plastic bag, which caused mass to fill up the bag through heat. Our groups buoyancy was even when we tested it out, which means that our lantern was floating evenly (not going up or down too much when letting it go).
The bag creates a container of gas molecules and the candle creates the heat energizing the molecules which caused it to inflate and get hot so it ends up kicking out some molecules. Air inside the balloon increases in volume and is less dense than the air on the outside of the balloon causing it to float .
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December 2016
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