# Size of Balloon That Pops LOUDEST!!

## INTRODUCTION!!!

I decided that I was going to discover what size balloon pops the loudest. My hypothesis was if I pop 5in, 9 in, and 12 in balloons then the 12in balloon will pop the loudest because it has more air pressure trying to escape the balloon all at once.When a balloon is popped then all of the air tries to rush out all at once causing the balloon to expand quickly. When the whole expands, it expands very quickly causing the balloon to pop and I wanted to see if the size affected how loud the pop is. The air pressure inside of the balloon is naturally what makes the balloon pop. Air pressure is described as the weight of the atmosphere pressing down on the earth. But, when in a balloon the air pressure is pressing against the sides of the balloon, and thats why the air rushes out all at once, causing the balloon to pop. Sound has a big part in the popping of a balloon. Sound is created when something emits energy in a form of vibration. In this case the balloon is emitting the energy into our ears, creating the loud pop that we hear.

## Materials and Methods

For my experiment used 3 different sizes of balloons. (5”, 9”, 12”) My control variable was what I could control, like the color of the balloon, what brand of balloon I used and the needle I used.My independent vairable was the size of the balloon I used. I used 5”, 9”, and 12”. My dependent varible is what i’m measuring. I measured how loud balloon pops are. I first blew up the different sizes of balloons and took the balloons and popped them one by one. I first popped the 5” balloon and recorded the results, then I did the same for the 9” and the 12”.

Notice: The 12” balloons are a pearlized white.

## Results and Analysis

All of the pops that I recorded were different. When the 12” balloon popped it had the biggest sound. I knew this would happen because my research showed that the more air pressure inside the balloon that is pressing against the sides of the balloons the bigger the pop will be. The same thing happened with the 5” and the 9” balloons. As they got smaller in size they got less loud. My graph shows that the larger the balloon was the bigger the pop was. My hypothesis said that the larger the balloon was the bigger the pop will be and my graph show that.

## Discuss and Conclusion

When I was completely finished with my experiment I found that my hypothesis was correct. My hypothesis was If I pop 5in, 9 in, and 12 in balloons then the 12in balloon will pop the loudest because it has more air pressure trying to escape the balloon all at once. My results showed that when I put more air inside of a balloon then it would pop louder. My result did agree with my research because my research said that the air pressure (air) that is in the balloon, the louder the pop will be. In this science experiment I learned that the more air pressure that is in a balloon the louder it will be. I also learned that when I pop a balloon the pop that we hear is energy that is being emitted to our ears in the form of waves. If I were to do this again I would make sure that all of the colors of the balloons are the same color.