# Why does the water rise in a glass with a candle?

A fun experiment to make the water rise in a glass with a candle. Impossible, you think? With a touch of science, understand the mechanics of fluids, which will allow you to extinguish the flame without blowing on it while making the water level rise. Surprise your friends, family, and teachers with this fun experiment.

## Let's experiment

Gather the necessary materials

In a plate, pour 50 ml of water and add a coin. You can add a few drops of food coloring to help visualize what is happening.

Now you have a candle, a lighter, and a glass. How do you get your coin back without touching the water?

To do this, place the candle in the center of the plate and light the wick.

Now turn your glass upside down to trap the candle.

What do you observe? Does the water rise in the glass to dry out the plate? If so, you have succeeded in your challenge! Congratulations!

## The flame of the candle goes out in the glass.

When you turn your glass upside down over the lit candle, you can see that it goes out after a few seconds. Immediately afterward, the water in the plate rises into the glass.

The oxygen, an essential gas for maintaining the flame, is consumed in the glass. Oxygen undergoes a chemical transformation during the combustion of the candle. It forms carbon dioxide, a colorless gas that dissolves in water.

## Water rises in the glass as the temperature drops

It is important to know that the temperature of the candle flame is around 1200°C. In other words, it is very hot. The gases in the vicinity expand, i.e., they take up more space. But when the candle is extinguished, the temperature drops immediately. So the gases trapped in the glass contract. A vacuum is created. Basically, you create a vacuum.

## The water rises, rises, rises in the glass!

But since nature likes balance, the pressures inside and outside the glass must balance. So the only way is for the water in the plate to rise into the glass. Thus, the pressure inside the glass is equal to the atmospheric pressure outside it.

## Other fun experiments to do at home

### Decode messages with a red filter

Do you want to send secret messages to your friends, without anyone else being able to read it? Or even send a secret invitation to a lover? Play with light and color transmission to hide your messages. It’s your turn to play! […]

### Yeast’s inflating power

Here is a great and visual experience for you to discover the secret world of bacteria. They are very useful to us and we use them in many cooking recipes, for example. Watch how bacteria turn sugar into alcohol and carbon dioxide using a simple soda bottle and a balloon.
It’s a great way to identify which drinks have sugar and which doesn’t. […]

### The volcano science experiment

Observing a chemical reaction in your kitchen is possible with the volcano science experiment. Build your volcano with sand. And then let’s move on to making lava. […]

Curiokids, official partner of Enseignons.be