Last week, the children designed an investigation to test different materials for their ability to insulate against sound. They learned that soft materials with lots of holes, like foam, are best for absorbing sound. They made their predictions based on this information.
This week, the children made their own ear defenders using different materials. They then tested them by holding them to their ears while a drum was played. The children tried out each material and decided which of them made good insulators.
The majority of the class agreed that cotton wool and fabric made the best insulators. They found that foil was the worst insulator
