Mindmap

istory of life on earth - text breakdown

  • History Of Life On Earth - Revision
    • Archean
      • Single celled organisms
        • Cyanobacteria 
      • Lots of CO
      • The sun was very faint
    • Cambrian Period
      • Explosion of Species
      • Animals swam, crawled, burrowed and hunted
      • The sea was the centre of living activity
    • Ordovician
      • Things started to explore the margins of land, but nothing got far
      • There was a 500 000 year ice age in this period
      • Everything was still confined to the seas
    • Silurian 
      • The reefs got their act together
        • They were not made of the same material as todays reefs, however
      • Plants became more established on land
      • Bony fish started appearing
    • Devonian
      • This is known as the age of fishes
        • This is because we see many new fishes start appearing over here
      • Seas were around 30º celsius
      • There were more than 365 days in a year
    • Carboniferous
      • The highest oxygen levels the Earth has every seen
      • Plants grew and died at such a rate, they eventually became coal
      • The first reptiles appeared here
      • There was an ice age at the end of this period
    • Permian
      • The largest mass extinction happened in this period
      • There one large continent called Pangea
      • Pangea was arid
      • Oxygen plummeted too
    • Triassic
      • Heat, vast deserts, warm seas
      • Life took a while to recover
      • The first mammals and dinosaurs are seen here
    • Jurassic
      • The first birds and some dinosaurs
      • Breaking up of the continents
    • Cretaceous
      • The most famous mass extinction happened here
      • Sea levels were very high
      • India began its journey North, forming the Indian Ocean=
    • Paleocene
      • Evolutionary experiments
      • Mammals and birds became more distinguished
      • Dense forests
      • India collided with Asia
      • The climate was much wetter and sea levels rose
    • Eocene
      • This was a time of global warming
      • Forests thrived everywhere, even at the poles
      • India pushing against Asia formed the Himalayas
      • Africa began its journey upwards an collided with Europe to form the Alps
    • Oligocene
      • This was a time of global cooling
      • Grasslands became larger and forests shrank correspondingly
        • This allowed for the development of fast running prey and predators
    • Miocene
      • The apes arose and diversified during this epoch
      • Human ancestors and the ancestors of the chimps had split up
      • Kelp forests made their first appearance
      • Grasslands carried on to grow
    • Pliocene
      • The human lineage had split away and formed over here
      • Ice at the North Pole became permanent
    • Pleistocene
      • This was a period with punctuated Ice Ages
      • Our species evolved here
    • Holocene
      • This is the current epoch
    • All of these time periods fall under larger time blocks
      • Eon
        • Phanerozoic
          • Cenozoic
            • Quaternary
              • Pleistocene and Holocene
            • Tertiary
              • Paleocene -> Pliocene
          • Mesozoic
            • Triassic -> Cretaceous
          • Paleozoic
            • Cambrian -> Permian
        • Proterozoic
        • Archean

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