Where does a candle go when it burns?

We know why candles melt - from being lit, of course! But where do candles go when they melt? Do they just disappear into thin air? We asked scientist Fabien Goulay from West Virginia University to help us understand. Got a flicker of a Moment of Um question for us? Send it to us at BrainsOn.org/contact , and we’ll help you light up an answer. See omnystudio.com/listener for privacy information.