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Science Investigation

As part of our current Science topic of sound, we have been investigating sound insulators and decided to conduct an experiment to discover the best sound insulator from a range of materials. We planned our experiment and made sure that it would be a fair test by only changing the material used each time. Although we enjoyed conducting the experiment, we all ended up with different results! So, which do you think is the best sound insulator: cotton, plastic, bubble wrap, paper or cardboard?