A Range Of Straws Lab Report
Year 6 children investigated how the length of the straws affects the sound it makes. The pattern that was noticed in the results shows that the shorter the straw gets, the higher the pitch of sound is produces. From the results I have noticed that the length of the straws is the independent variable and the sound is dependent variable. This meant that the straws length had to be changed in order to receive results of the sounds. I gathered from the information that students were using different length straws to determine the pitch. I reorganised the table by the length of straws, starting from the shortest. I knew from the table that the length of the straw is an independent variable factor ( as it is on the left hand column) and the pitch of sound right at the end is a dependent variable. …show more content…
The results that were gathered show similarities to other instrument that produces high and low pitch of sounds. The reason for this is that the air vibrates inside the straw and the pitch of the sound depends on the frequency of the vibration. As it travels through the air to pupil’s ear the vibration changes depending on the length or the thickness of the straw. All the information in the table plays a part in the experiment because without the independent variable (length of the straw) it would have been impossible to determine different sound pitch. It is also important to record the types of material the straws were made from and the width of straw. These factors could be used to show how reliable it is and possibly others could repeat the process. However, color of the straw is not necessary; it is highly unlikely that this would have any effect on the vibration which travels through the
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