About 2 results.
Each time period has left its own impressions in the rock layers.
Tags: found, fossils, scientists, fossil, time, earth, extinct, record, organisms, woods, fossil record, changed over, least one, changed over time, rock layers, life forms, over time, fossils found, become extinct, least one hundred, found fossils
Explain to students that rock layers are much like the stacked 7.
Tags: layers, rock, students, activity, history, fossils, magazines, found, clay, oldest, rock layers, curriculum framework, line master, youngest layers, discuss how, black line, tell students, fossils found, science grade, black line master, indiana science grade