The flame on the candle needs the gas oxygen to keep burning. Once we place the glass
container over the lit candle, the oxygen inside begins to get used up. Once all the oxygen has
been used, the flame will go out. However, there are still other gases remaining inside the
glass (nitrogen, argon, carbon dioxide, etc). But these gases have lower pressure inside the
glass when compared to the higher atmospheric pressure on the outside of the glass. This
higher atmospheric pressure from the outside pushes the water from the plate up and into the
glass.