The sound was higher pitched in the glasses with the least amount of water, I think this is because the sound can make the class vibrate more because the water is not stopping the class from vibrating, I also think that the object is blocking the vibrations as well as water.
Hamish, Theo and Ridge this is a fantastic recording. You have documented your whole investigation. I like how you were organised with what you were going to do and gave each other turns to talk, which included making predictions, observations and explanations. Ridge I like your comment about the water is slowing the sound vibration down-you are correct with this prediction. Super!
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