Pandai Lab 14 will do a simple experiment and can amaze your kids and students. You want to know what kind of that experiment? Yes, it is a candle in a jar experiment. Your kids will be amazed by this simple burning candle in water science experiment. This rising water experiment will teach your kids the effect of air pressure.
This science experiment is easy to prepare but you have to be more cautious because you will use candles in this experiment. You may be wondering how this Science experiment will work with the candle being under water. Want to know what happened from this experiment. Let’s do it. Here the details for experiment:
Date: 29 December 2020
Title: Candle in Jar Experiment
Materials: Food colourings, candles, plate, water and a glass.
1. Prepare a glass of water. Add 2-3 drops of food coloring to the water.
2. Pour the colored water into the plate. You want about a half-inch (1 cm) deep puddle in the plate.
3. Set the candle straight up in the puddle in the center of the plate.
4. You may add and pour the water into the plate.
5. Get ready, light up the candle.6. Cover the candle with the glass and watch what happens.
6. Water slowly starts collecting inside the glass and when the flame goes off, there is a bigger gush of water going into the glass.
What makes this possible and happened?
Okay, now. Let’s check what happened from this experiment. As we know, when the flame is burning, the hot air expands quickly. As you cover the candle, some of the expanding air escapes from under the glass.. When the flame slowly fades and goes out, the air in the glass cools down and the air contracts, therefore taking up less space. This contraction – low pressure – creates a very weak vacuum in the container. Where’s the higher pressure? Right! It’s outside the container pressing down on the water in the plate. The outside air pushes water into the glass until the pressure is equalized inside and outside the glass. The water stops rising when that pressure equalization is reached. As a result, the high-pressure air outside the glass pushes on the water, forcing the water into the glass. Visually, we can see the water level rising until the air pressure inside the glass is the same as the air pressure outside the glass.
You can check the reference on this link for more details:
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