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Birth of the earth

Birth of the earth. The geological time scale Eras and periods. What you will learn………. How vast the earth’s geological time scale really is The different eras and periods in earths history You will learn where each of the eras fits on the geological time scale

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Birth of the earth

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  1. Birth of the earth The geological time scale Eras and periods

  2. What you will learn……… • How vast the earth’s geological time scale really is • The different eras and periods in earths history • You will learn where each of the eras fits on the geological time scale • The type of life that existed in each era • The major events or milestones that took place that shaped earths geologic history • Where mankind’s history fits on the time scale and how very small that time is in comparison to the rest of earth’s history

  3. Some background history • Starting from the Big Bang! • Barenaked Ladies theme song versions • http://www.youtube.com/watch?v=lhTSfOZUNLo&feature=related

  4. Big Bang con’t • Other cool videos (more comprehensive) • A Brief History of Earth • http://www.youtube.com/watch?v=y_jiwmtuenQ&feature=fvw Carl Sagan: The cosmos discovers itself • http://www.youtube.com/watch?v=B1hVx7BsvjU&feature=related • http://www.youtube.com/watch?v=iE9dEAx5Sgw Esoteric/Mind blowing Video (Evolution of Everything) • http://www.youtube.com/watch?v=kbJ_nIFmFsc&feature=related • http://www.youtube.com/watch?v=KbjluE9560Q

  5. How old is the Earth? about 4.6 billion years old How long ago did the earth cool enough for water vapor to condense and form oceans? about 3.8 - 3.9 billion years ago 4.6 billion yr ago 3.8 billion yr ago

  6. Key dates in the history of Earth • 4.6 billion years ago: earth is formed, along with the other planets • 3.7 billion years ago: earth's crust solidified • 3.6 billion years ago: A cooling process began on Earth • 3.5 billion years ago: first life appears in oceans • 3.25 billion years ago: photosynthesis begins in oceans • 3.0 billion years ago: Clouds formed. • 2.4 billion years ago: oceans contain significant amounts of oxygen • 1.9 billion years ago: Eukaryotic cells (cells with a nucleus) evolved in the oceans • 0.65 billion years ago: first multi-cellular organisms appear • 0.5 billion year ago: Oxygen began to saturate the atmosphere. • 0.5 billion years ago: first land plants with inner vessels • 250 million years ago: mass extinction of 99% of all life • 245 million years ago: Age of Dinosaurs begins • 150 million years ago: Supercontinent breaking up; continents drifting apart • 65 million years ago: Age of Dinosaurs ends with mass extinction of 70% of all life • 3.5 million years ago: First proto-humans appear, in what is now Africa • 100,000 years ago: First Homo sapiens appears • 10,000 years ago: Recorded human history begins

  7. Today’s Project…………. • Break into research teams of 3 to 4 • The teams will record/mark & draw 4.6 billion years of Earths history on adding machine paper (1cm = 10 million years) • 10cm = 100 million years, 1m = 100cm = 1 Billion Years • Pre-Cambrian Time (4.6-0.54 B.Y.A): Length = 4.06 BY = 4.06m= ?? • 406cm • Paleozoic Era (250 - 540 million years ago): Length = 290 MY = ?? • 29cm • Mesozoic Era (65 to 250 m.y.a): Length = 185 MY = ?? • 18.5cm • Cenozoic Era (present to 65 m.y.a): Length = 65 MY = ?? • 6.5cm • Use WEB resources and your book (213-226) • Complete the Geologic Time Scale Quick Lab Handout and mark two period lengths on your time strip as outlined in step 4. • Do step 5 and decorate your strip with names & drawings of organisms that lived during each division of time (use pg 213-226 in text for ideas)

  8. Interactive Time Travel…….. • http://science.nationalgeographic.com/science/prehistoric-world/prehistoric-time-line.html • http://elearn.stisd.net/mod/resource/view.php?id=2401

  9. Good research web sites……. • http://www.fossils-facts-and-finds.com/geologic_time_line.html • http://www.historyoftheuniverse.com/tl1.html • http://www.physci.wsc.ma.edu/young/hgeol/geoinfo/geohistory.html • http://www.triassiclegacy.org/Bio_Timeline.html • http://www.fieldmuseum.org/evolvingplanet/POST/EP_v8.swf • http://paleobiology.si.edu/geotime/main/

  10. Time Scales (pg 213)

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