What is the Earth's time scale?

What is the Earth's time scale?

Monday December 9,2013 Do Now: Iron oxides are chemicals composed of iron and oxygen. Scientist found that sedimentary rocks prior to 3.5 billion years ago did not contain iron oxides. This information is an indicator or clue about the atmosphere 3.5 billion years ago. Would you expect to find oxygen in the atmosphere 3.5 billion years ago? Reminder

1. Do Nows are grade weekly and can not be made up. 2. Engagement points are graded weekly Today Homework 1. Do Now 1. Cornell notes section 2. Major events in Earths history

30.1 3. Complete geologic time webquest. 2. Unit 4 test Tuesdaybinders can be used for the test What is the Earths time scale? The Geological time scale is a record of the life forms

and geological events in Earths history. Scientists developed the time scale by studying rock layers and fossils world wide. Radioactive dating helped determine the absolute divisions in the time scale. Divisions of Geologic Time

Eras are subdivided into periods...periods are subdivided into epochs. Era Period Epoch E + P = EP

FOUR Eras PRE-CAMBRIAN 88% of earths history Paleozoic (ancient life) 544 million years agolasted 300 million yrs Mesozoic (middle life) 245 million years agolasted 180 million yrs Cenozoic (recent life) 65 million years agocontinues through present day

Earths Major Events The formation of Earth 4.6 BYA The Big Bang Theory video First Life 3.8 BYA simple unicellular bacteria Anaerobic & did not photosynthesize

Great Oxidation/ Catastrophe Event Cyanobacteria-3500 BYA- Archean Eon Oxygen accumulates in atmosphere- 2.4 BYA- Proterozoic Era Greatest Extinction

Cambrian Explosion Biodiversity Increases 543 MYA- Paleozoic era began and the Cambrian period video Permian Triassic Extinction 252 MYA

Ended the Paleozoic Era & Permian period 96 % marine species & 70% terrestrial species were wiped out Mesozoic Era Cretaceous Tertiary Extinction 65 MYA- end of the Cretaceous period and Mesozoic era.

Beginning of the Cenozoic era & Tertiary period. 50 % of plants and animals were wiped out Last Ice Age 1.8 MYA- Cenozoic Era, Quaternary period, Pleistocene Epoch

First Homo Sapiens 200,000 YA- Cenozoic Era, Quaternary Period, Holocene Epoch

Recently Viewed Presentations

  • Program Review Annual Summary - Kern Community College District

    Program Review Annual Summary - Kern Community College District

    Program Review Annual Summary 2016. Prepared by the Program Review Committee (PRC) ... 8 student affairs units, and 12 academic affairs units across the College. 1 admin unit, 2 student and academic affairs programs did not submit a review. ......
  • How does Stevenson present duality through the settings in ...

    How does Stevenson present duality through the settings in ...

    Jekyll's house ('Search for Mr Hyde') The respectable nature of Jekyll is emphasised through the description of his house: Utterson regards Jekyll's hall as 'the pleasantest room in London.'
  • Metamorphoses of a Myth Actaeon in Antiquity Amphora

    Metamorphoses of a Myth Actaeon in Antiquity Amphora

    Apulian red-figure situla near Hippolyte Painter showing (below) Actaeon sprouting stag's horns, which attracts his dog's curiosity, while his mother Autonoe gestures anxiously from left and Artemis stands on right with second dog; and (above) Apollo (father of Aristaeus and...
  • DBI314: Microsoft SQL Azure Performance Considerations and ...

    DBI314: Microsoft SQL Azure Performance Considerations and ...

    Performance Consideration beyond the Database. Network Latency. ... co-locate with Windows Azure application . Minimize network round trips. SQL. Azure . Latency_1. ... DBI314: Microsoft SQL Azure Performance Considerations and Troubleshooting
  • Ancient Rome - acedwardslobos86.com

    Ancient Rome - acedwardslobos86.com

    The Fall of the Roman Empire. The ancient Romans tried to solve some of their problems by splitting the Roman Empire in half, hoping that would make the empire easier to manage. Each side had an emperor, but the emperor...
  • The Buzz in Room C5 Pick Elementary Mrs.

    The Buzz in Room C5 Pick Elementary Mrs.

    A Peek at the Week. Math: Fact Fluency Quizzes on 0-10 facts on Thursdays. Chapter 12 Two-Dimensional Shapes . Chapter 11 Test Area and Perimeter on Tuesday. Social . Studies: Focus: Alabama Agriculture & Resources . Map skills/daily geography ....
  • GCSE Art and Design First teaching in 2016.

    GCSE Art and Design First teaching in 2016.

    to help you deliver AQA Art and Design qualifications. Subject expertise: courses for all teachers, from newly-qualified teachers who are just getting started to experienced teachers looking for fresh inspiration.
  • 11 - storage.googleapis.com

    11 - storage.googleapis.com

    Respond to adequate stimulus by generating an action potential (nerve impulse) Impulse is always the same regardless of stimulus. Principles of Electricity . Opposite charges attract each other. Energy is required to separate opposite charges across a membrane.