Why Does Water Rise?
Make the water rise just using a candle and a bowl! The flame heats the inside of the container and the hot air inside the container expands quickly. When the flame goes out, the air in the container cools. The cooler air takes up less space and this creates a weak vacuum inside the container. The higher pressure is outside the container pressing down on the water in the dish. The outside air pushes water into the container until pressure is equalized.
WARNINGS & SAFETY
Only the volunteer should handle the candle. The attendee can add food coloring if they wish but should only watch as the volunteer conducts the demonstration.
