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Earth's History - Coggle Diagram

- - - - Convection Currents
      - Gooey magma
    - - Liquid
      - Gives earth it's magnetic field
    - - Solid because of immense pressure
  - - - Fromed from volcanic activity
    - - Caused by heat and pressure
    - - Caused by erosion and compacting
      - Usually have layers or strata
- - - - Oceanic plate goes under the continental plate because the continental plate is less dense
      - Creates a subduction zone
      - Creates magma chambers and potentially volcanic eruptions
      - Creates earthquakes
    - - Subduction zones
      - Creates magma chambers
      - Forms island chains
      - Aleutian Islands
      - Forms earthquales
      - Forms ocean trenches
    - - Poorly understood
      - Creation of mountains
      - Himalaya Mountains
  - - - Creates a mid-ocean ridge
      - Creates shallow earthquakes
      - Creates new seafloor/seafloor spreading
    - - Creates rift valleys
      - Creates earthquakes
      - Sometimes volcanic activity
- - - - Periods
        
        Epochs
  - - - Paleozoic
        
        Mesozoic
        
        Cenozoic
        
        Tertiary
        
        Quaternary
        
        Highlights
        
        Began 65 million years ago
        
        The Age of Mammals
        
        Modern mountain ranges form
        
        Mammals become much larger and more dominate
        
        Early modern humans evolve around 200,000 years ago
        
        Triassic
        
        Jurassic
        
        Cretaceous
        
        Mid Mesozoic era- Continents are in current locations
        
        Until this point, much of earth is covered in water
        
        End of the Paleozoic era, Pangaea is together
        
        Highlights
        
        Dinosaurs evolve
        
        First birds and mammals appear
        
        Most mammals are small and live underground
        
        End of Mesozoic era marked by mass extinctions, most likely due to a meteor hitting earth
        
        First flowering and seeded plants evolve
        
        The Age of Reptiles
        
        Cambrian
        
        Ordovician
        
        Silurian
        
        Carboniferous
        
        Permian
        
        Mississipian
        
        1 more item...
        
        Highlights
        
        Organisms with exoskeletons appear
        
        Vertebrates, plants, amphibians, reptiles appear
        
        Most animals are aquatic
        
        End of era marked by mass extinctions 90 % of marine animals and 70 of land organisms become extinct
      - Archaean
        
        Proterozoic
      - Precambrian era = 80 % of earth's history
      - Highlights
        
        1st organisms appear (cyanobacteria)
        
        Ozone layer appears
- - - - Paleoecologist
    - - Discovered the Chicxulub crater
    - - Archeologists who studied Mesoamerican cultures
    - - Archeologist who proved that megafauna sloths and humans coexisted
    - - Discovered that earth had a solid inner core and a molten outer core
    - - Proposed a cosmic reason for the dinosaurs' extinction based on the study of decay rates of radiation particles
- - - - A shared biological ancestor
      - Example: Apes and Humans
    - - Coal
        
        Prehistoric Swamp
      - Carbon Films
      - Molds and Casts
      - Original Remains
        
        Ice
        
        Tar
        
        Amber
      - Trace
        
        Behavior
      - Relative Age Dating
      - Carbon Dating
      - Fossil Record
        
        Index Fossils
        
        Provide a reference point used to date rocks
        
        Organisms who lived on earth for a short time
    - - Example: Mammal's lungs
    - - Example: Whale's hip bone
    - - Geographic isolation
      - Example: Australian Marsupials