In 8th grade science we are studying atomic spacing and we are currently completing the Density Test Tube Challenge. Students were challenged to create a test tube that consisted of three different layers of colored liquid using only water, salt, and food dye. In previous labs, we had covered the concept of atomic arrangement, molecular spacing, and density. With lab partners, students first had to design their own procedures. They were shown an example of the finished product, but they needed to use their knowledge of prior lab concepts to figure out how to make it. Once their procedures were approved, students then used those procedures for completing the challenge. Some groups that have been successful will be given the challenge to create a test tube consisting of 5 or more layers. One could say this challenge is layers upon layers of fun!
