Recently, in science class, we have been doing sound experiments. Our latest experiment was the Horn experiment. This experiment involved taking a paper towel roll and talking into it to a partner. We covered up the end of the roll first, with a piece of felt and then, with a piece of tin foil. Our partner recorded how well he/she could hear with each item on the end of the roll. The felt muted the sound better because it was heavier and the tin foil absorbed the sound.
Another experiment we did was the Tuning Fork experiment. A tuning fork is an object that is used to tune a guitar. Each pair of partners had a tuning fork, a paper cup of water. They were allowed to use any items that were on or in their desk or anything that they were wearing. Each person recorded their type of experiment and the prediction of what would happen in the experiment on a piece of paper. The partners would take turns using the tuning fork. Some kids banged the fork on their shoe. The fork vibrated extremely fast. Some would hit it on their desk and then hold it to their ear to see what sound it would make. The fork made a low “oooh” sound.
The final experiment we did was the Water in Bottle experiment. We divided our class into groups and poured a different amount of water into each bottle. We tapped all of the bottles with the end of a pencil. All of the bottles made a different sound. We learned that the amount of water in each bottle changed the pitch. When we put more water in the bottle, the pitch was lower. When we put less water in the bottle, the pitch became higher. Learning about sound is very interesting and fun!

Jake, Connor, and Jonathan