⚙️ Material Samples and Pollution Clues

Teams rotate through short stations with sample body materials, images of car parts, and a simple CO2-in-water pH demo to gather quick evidence that can confirm or challenge user assumptions. Students handle, compare, and record observations about weight, bend, texture, and possible durability, then connect these observations to user needs like safety, efficiency, and environmental impact. This gives teams science evidence they can use before writing their problem focus.