Age of the Earth - 4.6 Billion Years, Mesozoic Era - Age of the Dinosaurs, Paleozoic Era - Age of Fish & Amphibians, Cenozoic Era - Age of Mammals, Geology - the study of Earth's origin, history, and structure, Eons Eras Periods - Chunks of time in Earth's History, Geologic Time Scale - Map of Earth's History, Formation of Earth - Dust & Rock came together by gravity, Cambrian Explosion - A large number of new plant and animal species appear, Permian Extinction - The largest mass extinction, Cretaceous Extinction - The extinction of the dinosaurs, Bacteria - First forms of life on Earth, Formation of the Moon - Planet Thea Collided with Earth,

ES Part 1 Early Earth

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