Students will identify features of an index fossil that make it useful in studying Earth’s History. Students will complete activities 1 and 2. Activity 1: read the section titled “Index Fossils” and answer questions 1-4. Activity 2: Look at the three cross sections of rock strata from three different locations on the handout. Assume the locations are found on three different continents. Analyze the fossils in the rock strata. Answer questions 1-5.