As I promised you not long ago, my Year 8 students are doing their oral presentations about "the Sound".
Some of them have recorded a video, some of them have built simple devices such as telephones, while others have brought some materials to develop their experiments.
They have demonstrated that every sound we hear occurs because something vibrates, although not all vibrations are perceived as sound.
They have also proved that there are three things needed to produce sound:
- an emitter or the object that vibrates
- a material medium that sound can travel or be transmitted through (solid, liquid or gas)
- a receptor (our ear or a microphone).
They heave learned that the speed at which sound waves travel depends on the characteristics of the medium.
The final projects have been quite original and entertaining, and below there are a few pictures where you can see some of them.
In the next couple of pictures Cristina Conesa tries to create sound just with a wine cup filled up with water.
In the next picture Dharma explained to the class at what speed sound travels.
One of them tried to show us why a laser pointer placed on top of a speaker playing music vibrates, depending on the frequency of the vibration that makes the sound.
The next pics show one of the last groups during their oral presentation, which has been great as they have covered almost all the topics from the unit, with very simple but interesting experiments(they´ve used balloons, yoghurts, water speakers, and even musical instruments) keeping our attention the whole time.
So I´m very happy with the results and with the commitment shown by the students on this project.
By Cristina Cuenca.
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