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In this simple experiment, Secondary 1 students explored the concept of sound through a hands on activity using a guitar and a ukulele. The experiment focused on understanding volume and pitch.

First, the students demonstrated how to produce soft and loud sounds. They gently plucked the strings to create a soft volume and then plucked the strings more strongly to create a loud volume. This showed that the volume of sound depends on how much force is used to vibrate the strings.

Next, the students demonstrated how to change the pitch of sound using different strings. They played thicker and thinner strings on the guitar and ukulele. The thicker strings produced lower pitched sounds, while the thinner strings produced higher pitched sounds.

Then, the students demonstrated how to change the pitch using one string. By pressing the string at different positions along the neck of the instrument, they were able to change the length of the vibrating string. Shorter vibrating lengths produced higher pitched sounds, while longer lengths produced lower pitched sounds.

Through this experiment, students learned that sound is produced by vibrations and that both volume and pitch can be changed in different ways. At the end of the activity, the students organized their observations and results into a science report, helping them practice scientific thinking and communication skills.