Overview: Students learn the differences between “gradualism” and “punctuated equilibrium” by manipulating two sets of simulated fossils (Caminalcules). Author/Source: McComas, William Grade level: 9-12 Time: 1-2 class periods. Concepts: Background extinctions are a normal occurrence. Rates of extinction vary. The fossil record provides evidence for evolution. The fossil record documents patterns of extinction and the appearance of new forms. Rates of evolution vary. Teacher background: Speciation

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