Brooke Martin
The underwater candle experiment is a fun activity for kids that demonstrates the wonders of heat energy transference. To perform this experiment, you'll need a few simple materials: a candle, a glass bowl, water, modelling clay or duct tape, and a lighter or matches. The candle should be cut down to a length that is slightly shorter than the height of the bowl. The candle is then secured to the bottom of the bowl using either modelling clay or duct tape, ensuring it stands upright. Water is then carefully poured into the bowl, filling it to just below the top of the candle, taking care to keep the wick dry. The candle is then lit, and the water keeps the outer layer of wax cool, preventing it from melting. This creates a protective wall around the wick, allowing the candle to continue burning even when the flame is below the water level.
| Characteristics | Values |
|---|---|
| Candle type | Tall candle |
| Candle holder | Bowl |
| Candle holder material | Glass |
| Candle adhesive | Modelling clay |
| Water temperature | Cold |
| Water level | Just below the wick |
| Flame position | Below water level |
Explore related products
What You'll Learn
The candle should be stuck tightly to the bowl
To ensure the candle burns underwater, it is important that it is stuck tightly to the bowl. This can be done in a few ways. One way is to use duct tape to fasten the candle to the bottom of the bowl, as suggested by Education.com. Alternatively, Playingwithrain.com recommends cutting the candle down to a length that is just below the height of the bowl and securing it with modelling clay. Gallykids.com also suggests sticking the candle to the bowl with melted wax.
It is important to ensure that the candle is secure and will not topple over, as this could be a safety hazard. Modelling clay, duct tape, and melted wax are all effective ways to secure the candle to the bowl. However, it is important to note that the candle should not be fully submerged in water, as this will cause the flame to blow out. The water level should be just below the wick of the candle.
When using modelling clay, it is recommended to work it into a nice round flat circle and place it on the inside bottom centre of the bowl. The candle can then be attached to the clay by pushing it down gently. This will help to ensure that the candle is secure and will not move.
For the duct tape method, cut four 4" lengths of duct tape and fasten the candle to the bottom of the bowl. This will create a secure base for the candle and ensure that it does not move.
When using melted wax, pour a few drops of melted wax inside the bowl and stick the candle firmly into it. Allow the wax to dry for a few minutes before filling the bowl with water. This will create a strong bond between the candle and the bowl, ensuring that the candle does not move.
By securing the candle tightly to the bowl, you can create a safe and effective underwater candle display. It is important to supervise children at all times when performing this experiment and to ensure that they understand the potential dangers of an open flame.
Creative Candle Melting: A Step-by-Step Guide
You may want to see also
Explore related products
Water level should be just below the candle top
To perform the underwater candle experiment, you will need a candle, a glass bowl, duct tape or modelling clay, and water.
Firstly, cut the candle down to a length that is just below the height of the bowl. You can measure the height of the bowl from the inside bottom to the rim, or you can simply eyeball it. Stand the candle in the centre of the bowl and secure it to the base with duct tape or modelling clay. Make sure the candle is stuck tightly to the bowl.
Now, carefully pour water into the bowl so that the water level is just below the top of the candle. Be careful not to submerge the wick!
Once the candle is burning, watch and wait for several minutes as the wax begins to melt and the candle starts to get shorter. Eventually, the wick and the inside core of the candle will drop below the water level, but the candle will keep burning. This is because the water keeps the outer layer of wax cold enough not to melt, creating a wall of protection around the wick.
Candles and Puppies: A Potentially Deadly Mix
You may want to see also
Explore related products
The water absorbs heat from the flame
The materials required for the underwater candle experiment are simple and easily accessible. They include a candle, a glass bowl, duct tape or modelling clay, and water.
To set up the experiment, begin by securing the candle to the bottom of the bowl. This can be done using duct tape or modelling clay. Ensure that the candle is firmly attached to the bowl, as this will prevent it from floating or moving around when the water is added. Once the candle is secure, carefully pour water into the bowl. Fill it to a level that is just below the top of the candle, ensuring that the wick remains dry.
The key principle behind this experiment is that the water absorbs heat from the flame. When the candle is lit, the water surrounding it plays a crucial role in regulating the temperature. The cold water absorbs the heat generated by the flame, which has two important effects. Firstly, it keeps the exterior of the candle at a cool temperature, preventing the wax from melting. This is in contrast to what happens when a candle burns in the open, where the wax melts and drips down the sides. Secondly, as the water absorbs heat, it creates a protective barrier of solid wax around the wick. This wax wall forms because the water keeps the outer layer of wax cold, preventing it from melting.
The formation of this wax wall is essential to the continued burning of the candle. Even as the wick burns and descends below the water level, the wall of solid wax remains intact. This wall acts as a barrier, preventing the water from reaching the flame and extinguishing it. Thus, the candle continues to burn, giving the appearance of a flame burning underwater.
The underwater candle experiment is a fascinating way to demonstrate the concept of heat energy transference and the high heat capacity of water. It is a simple yet effective way to educate and engage children, providing them with a magical experience while also offering valuable scientific insights.
Candle Dedication: A Step-by-Step Guide to Success
You may want to see also
Explore related products
The wax surrounding the wick doesn't melt
The "underwater candle" experiment is a fun activity to do with kids. It involves lighting a candle that has been fixed to the bottom of a bowl and then filling the bowl with water until it reaches just below the candle's wick. The candle continues to burn even when the wick is slightly below the water level. This is because the water surrounding the candle keeps the exterior of the candle at a cool temperature, preventing the wax surrounding the wick from melting and creating a protective wall around the flame. This phenomenon is due to the high heat capacity of the water, which absorbs the heat from the flame and allows the wax to remain solid.
The key to the success of this experiment is ensuring that the candle is securely attached to the bottom of the bowl and that the water level is high enough to cover the wick without touching it. This can be achieved by using modelling clay or duct tape to fasten the candle in place and then carefully pouring water into the bowl until it reaches just below the wick.
Once the candle is lit, the hot flame melts the wax immediately around the wick. However, the water surrounding the candle keeps the outer layer of wax cool enough to prevent it from melting. This creates a wall of solid wax that protects the flame from being extinguished by the water. The water level rises slightly as the wax on the outer diameter of the candle softens and allows water to leak in, but the candle continues to burn as long as the protective wax wall remains intact.
The "underwater candle" experiment is a great way to demonstrate the high heat capacity of water and how it can absorb heat from the flame, keeping the wax solid and preventing it from melting. This simple experiment captivates both children and adults, providing an entertaining and educational experience for all.
While the candle appears to be burning underwater, it is important to clarify that the flame is not completely submerged. The water level reaches just below the wick, and the wax surrounding the wick remains solid due to the cooling effect of the water. This creates the illusion of a burning underwater candle, but it is crucial to understand that the flame is not directly in contact with the water.
Candling Chicken Eggs: A Step-by-Step Guide
You may want to see also
Explore related products
The water prevents the wax from dripping
The materials required for an underwater candle experiment are simple: a candle, a glass bowl, duct tape or modelling clay, and water. The experiment is a great way to demonstrate the high heat capacity of water and can be performed with adult supervision.
Firstly, cut the candle down to a length that is just below the height of the bowl. Then, fasten the candle to the bottom of the bowl with duct tape or modelling clay. Fill the bowl with water to a level that is just below the top of the candle, ensuring the wick is not submerged. Light the candle, and watch as it burns down below the water level.
The water prevents the wax from melting and dripping by keeping the exterior of the candle at a cool temperature. The cold water surrounding the candle absorbs the heat from the flame, allowing the wax to remain solid. This creates a wall of protection around the wick, which allows the candle to continue burning even when the flame is below the water level.
The candle will eventually burn down and extinguish as the wax softens and allows water to reach the wick. However, before this happens, the experiment demonstrates how the water prevents the wax from melting and dripping, creating an underwater flame.
Citronella Candles: Effective Bug Repellent or Not?
You may want to see also
Frequently asked questions
You will need a candle, a glass bowl, water, and some modelling clay or melted wax.
First, cut the candle so that it is slightly shorter than the glass bowl. Secure the candle in the centre of the bowl with modelling clay or by pouring a few drops of melted wax inside the bowl. Fill the bowl with water to just below the top of the candle, ensuring the wick is not submerged. Light the candle and watch as it burns below the water level.
The water surrounding the candle absorbs the heat from the flame, allowing the wax to remain solid and creating a wall of protection around the wick.
Eventually, the wax on the outside of the candle will soften, allowing water to leak in and fill the area around the wick, causing the flame to extinguish.
