Lecture1 - 21 The History of Life on Earth 21 The History of Life on Earth • What is the history of life on Earth • How do we define time

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Unformatted text preview: 21 The History of Life on Earth 21 The History of Life on Earth • What is the history of life on Earth? • How do we define time intervals describing Earth’s history? • What is the relationship between geology and biology? What is geology? How do we determine the age of a rock layer or fossil? • What are some major patterns in the history of life on Earth? • What are the rates of evolutionary change within lineages? • What is the future of evolution? 21 History of Life on Earth as a 30-day Calendar 21 History of Life on Earth as a 30-day Calendar 21 History of the Earth Represented as a 24 Hour Day After a figure from Cradle of Life , by J. William Schopf; http://homepage.mac.com/pete.boardman/24hourclock/design.html 21 The History of Life on Earth • What is the history of life on Earth? • How do we define time intervals describing Earth’s history? • What is the relationship between geology and biology? What is geology? How do we determine the age of a rock layer or fossil? • What are some major patterns in the history of life on Earth? • What are the rates of evolutionary change within lineages? • What is the future of evolution? 21 Geological Time Scale http://www.diracdelta.co.uk/science/source/g/e/geological%20timescale/source.html 21 Life and the Geological Time Scale: Eons Fig. 2.1 21 Geological Time Scale http://www.diracdelta.co.uk/science/source/g/e/geological%20timescale/source.html 21 Life and the Geological Time Scale: Eras and Periods http://www.cr.nps.gov/museum/exhibits/dino/geotime/ geotime2.html 21 21 21 The History of Life on Earth • What is the history of life on Earth? • How do we define time intervals describing Earth’s history?...
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This note was uploaded on 02/08/2010 for the course EN 550.171.02 taught by Professor Staff during the Spring '08 term at Johns Hopkins.

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Lecture1 - 21 The History of Life on Earth 21 The History of Life on Earth • What is the history of life on Earth • How do we define time

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