Second graders are studying invertebrates and PreK scientists will begin an ocean unit, so both groups investigated shells in lab. All shells begin as a home for an invertebrate. If a shell is empty, the animal died, was eaten, or in some cases changed shells. A hole in a shell indicates a predator penetrated the protective covering.
Both groups classified their shells into bivalves and gastropods and then found new ways to sort their shells into groups.
Second grade students also classified shells using two properties with a Venn diagram. The common attributes were placed in the intersection.