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A Brief History of Earth. /Notes/. Image by: soumitra911. NASA, NOAO, ESA and The Hubble Heritage Team (STScI/AURA). NASA. /Hadean/. 4.6 to 3.8 billion years ago. /Hadean/ Surface. Began mostly molten. /Hadean/ Surface. 1 st crust formed after 100 million years.

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/Notes/

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  1. A Brief History of Earth /Notes/ Image by: soumitra911

  2. NASA, NOAO, ESA and The Hubble Heritage Team (STScI/AURA)

  3. NASA

  4. /Hadean/ 4.6 to 3.8 billion years ago

  5. /Hadean/Surface Began mostly molten

  6. /Hadean/Surface 1st crust formed after 100 million years Image: Bread by Sifu Renka

  7. /Hadean/Atmosphere Came from gases erupted by volcanoes USGS/J.D. Griggs

  8. /Hadean/Atmosphere mostly carbon dioxide (CO2) http://www.flickr.com/photos/zrahen/11733545/

  9. /Hadean/Major events Earth formed (4.6 billion years ago) NASA/JPL-Caltech/T. Pyle (SSC)

  10. /Hadean/Major events Moon formed (4.5 billion years ago) NASA

  11. http://commons.wikimedia.org/wiki/File:Big_Splash.gif

  12. /Hadean/Major events Late Heavy Bombardment Don Davis, NASA

  13. /Hadean/Major events 4.1 – 3.8 billion years ago http://commons.wikimedia.org/wiki/File:Moon_Dedal_crater.jpg

  14. /Archean/ 3.8 to 2.5 billion years ago

  15. /Archean/Surface Many more volcanoes than exist today http://upload.wikimedia.org/wikipedia/commons/7/7f/Tarvurvur.jpg Image by: Taro Taylor

  16. /Archean/Surface First permanent continents Image by: Erica Marshall

  17. /Archean/Atmosphere Image by: groovehouse Still very little oxygen

  18. /Archean/Atmosphere CO2 methane Image by: patrick k. lauke Image by: n8kowald

  19. /Archean/Major Events First evidence of life Image by: AJC1

  20. /Archean/Major Events First evidence of life Image by: cheukiecfu

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