Cochrane – Fountain City sixth grade students became Explorer’s of the Deep! Students participated in the National 4-H STEM challenge, Explorer’s of the Deep on October 16th. First, they learned about ocean gliders and how they explore different locations, then they had the chance to try and make their ocean rocket ballast. C-FC sixth graders did this by adding weight to the inside of their vessel and then weighing it to determine the density in comparison to freshwater’s density.