We all know that water is a liquid and it follows the properties of a fluid. It is also a substance with mass so gravity is applicable on it. Now, we are going to do an experiment that let water to flow against gravity. Flowing against gravity? Yes of course, we present you our Rising Water Experiment were water flows upward. As this experiment uses fire, we strongly advice you to perform it only under the administration of an adult.
Try it yourself
- Glass tumbler(s)
- Colour (optional)
- Candle(s) and Matchbox (or lighter)
- Coin(s) as stand(s)
- A dish
Step 1: Assuming that you are using two candles and two glass tumblers, stick your candles to a coin each. Coins will serve the purpose of stands.
Step 2: Keep the candles inside the dish. Keep them away from each other.
Step 3: Now mix the colour in water and pour in the coloured water into the dish.
Step 4: Use the matchsticks to lit the candles and allow the fire to catch the candles well.
Step 5: Once the fire is stable on the candles, use the glass tumblers to cover the candles.
You will see that the fire on candles are extinguished and immediately the water in the dish start to rise upwards within the glass tumblers.
What is the logic of this Rising Water Experiment? As the candle burns, the heat produced by the fire causes expansion of fire around the candles and as you cover the candles using the glasses, the expanded air escapes through the openings. Continuing to lit within the glasses, the fire consumes all the oxygen and once the oxygen finishes, the candles dies away. This let the air within the glasses to cool down and contract. Contracting of air within the glasses creates vacuum and the atmospheric pressure pushes the water through the glass tumblers upward.
There is also another rising water experiment that helps you to understand the concept of capillary action. See that experiment here.