Making Bubbles

Question: What type of soap will make a bigger dry ice bubble?

laundry detergent, dish washing soap, or liquid hand soap?

Hypothesis: We think the dish washing soap will make a bigger dry ice bubble because it makes the most bubbles when we use it in the dish washer.

Our Experiment

Materials:

1.Large bowl or bucket with a smooth rim that is about 12 inches in diameter.
2.hot and cold water
3.Different types of liquid soap.
4.a piece of cloth about 18 inches long
5. gloves
                                                 6. safety glasses
                                                 7. a few pieces of dry ice

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Safety Procedures

Material 1: Always handle with gloves
Material 2: Always wear safety glasses when handling dry ice

Procedure:

1. Fill a bowl with hot water.
2. Put a piece of dry ice into the bowl of water.
3. Take a cup and put cold water in the bowl along with some soap.
4. Take a cloth and dunk it in one of the three different types of liquid soap that is mixed with water.
5. Then take the cloth and spread it across the top of the bowl.
6. If the bubble doesn't appear try the fourth step over again.   






Special Needs:
We will need dry ice to do our experiment at science night along with safety glasses.

The Science behind it

''Dry ice Changes directly from a solid to a gas without ever being a liquid. This process is called sublimation.
When dry ice is put into water it accelerates the sublimation process, creating clouds of fog that fill up your dry ice bubble until the pressure becomes too much and the bubble explodes, spilling fog over the edge of the bowl.''
Science Kids

Conclusion

There is a relationship between what type of soap we use and how big the dry ice bubble gets. When the cloth goes over the lip of the bowl, it creates a dry ice bubble which holds all of the fog that the dry ice makes when it is put in water.The bubble increases in size until the bubble cannot hold any more of the fog. Then it tips over and is no longer a dry ice bubble. Our hypothesis is correct. The dish washing soap did make the biggest dry ice bubbles.

Samara

My name is Samara. I am a fifth grader and I go to Somers Intermediate School. My favorite animal is the panda and my favorite sport is soccer. My best friend Jessica and I love this experiment and we hope you will too!

Jessica

My name is Jessica, I am a fifth grader in Somers Intermediate School. I love pigs,drawing and softball. I do lots of fun things with my friend Samara just like this experiment.