1. Chapter 8 The History of Life on Earth Conner Blackman High School

2. The History of Life on Earth 1.Evidence of the Past 2.Eras of the Geological Time Scale 3.Human Evolution

3. Chapter 8 Vocabulary Fossil Relative Dating Absolute Dating Geological Time Scale Extinct Plate Tectonics Precambrian Paleozoic Mesozoic Cenozoic Primate Hominid Australopithecine Neanderthal

4. Evidence of the Past Fossils and their Age Relative Dating Absolute Dating Radioactive Decay and Half Life Exercise Geologic Time Scale Eras are characterized by the type of animal that dominated the Earth at the time Changing Earth

5. Eras of the Geologic Time Scale 4 main Eras (Precambrian, Paleozoic, Mesozoic and Cenozoic Precambrian 4.6 billion years ago to 540 million years ago Air rich in CO, CO2, H, and N Earth’s surface was in turmoil (UV radiation, violent thunderstorms, meteorites, etc.