Imgres

The History of the Earth in 100 Years

By jmastro
  • Period: to

    Lifespan of Earth

    4.6 Billion years old
  • Period: to

    Precambrian

    1) The first eon
    2) The Precambrian eon is split into smaller eons:
    A) Hadean
    B) Archean
    C) Proterozoic
  • Period: to

    Hadean

    1) Begins 4,600,000,000 years ago
    2) The earliest time period
    3) Solar system was still being formed
    4) Sun formed, planets begin to take shape
    5) Earth - Molten rock
    A) Earth begins to cool towards the end of the Eon
  • Period: to

    Archean

    1) 1,500,000,000 years old
    2) Time of continent building
    A) 70% of continental land mass today is formed around rock from this period
    3) Atmosphere
    A) No oxygen
    B) Hydrogen
    C) Methane
    D) Ammonia
    4) First one-celled organisms
  • Period: to

    Proterozoic

    1) 1,958,000,000 years ago
    2) Continental movement a lot faster, more frequent collisions
    3) Rodinia Formed
    4) Autotrophs formed
  • Period: to

    Phanerozoic

    1) The second Eon
    2) Composed of 3 Eras:
    A) Paleozoic
    B) Mesozoic
    C) Cenozoic
  • Period: to

    Paleozoic

    1) 291,000,000
    2) Consists of 6 periods:
    A) Cambrian
    B) Ordovician
    C) Silurian
    D) Devonian
    E) Carboniferous
    F) Permian
  • Period: to

    Cambrian

    1) 542,000,000 years ago
    2) Continents forming
    A) Land had no plant or animal life on it
    3) Explosion of life:
    A) Most in water
    B) No backbones (invertibrates)
  • Period: to

    Ordovician

    1) 488,000,000 years ago
    2) Gonwana - super continenet
    A) Australia, Africa, Southern Europe, Antarctica and South America
    B) Mostly covered by water
    3) Climate:
    A) Fairly warm
    B) Glaciers formed because Gondwana stopped moving around the south pole.
    I) Sea level dropped
    II) Climate change, which led to extinction at the end of the period.
    4) First land plants
  • Period: to

    Silurian

    1) 444,000,000 years ago
    2) Climate:
    A) warm period - causing glaciers to melt and seas rose
    3) Mountain buliding due to continental plates coliding
    4) New variations of marine life formed
    5) Eurypterids - sea scorpions
    6) Life on land - mosses & primitive plants; insects
  • Period: to

    Devonian

    1) 416,000,000 years ago
    2) N. America and Europe collided; formed Euramerica
    3) Plants cover land
    4) Insects and animals on land:
    A) wingless insects and spiders
    B) four-footed vertebrate
    5) Age of Fish
    A) Thousands of species develop
    B) Fish w/ Jaws
    C) Chondricthyes (ancinet shark)
    6) Extinction Ends Period- water hurt much more than land
  • Period: to

    Carboniferous

    1) 359,000,000
    2) Pangea
    3) Amphibions and reptiles
    4) Giant insects
  • Period: to

    Permian

  • Period: to

    Mesozoic

    1) 251,000,000 years ago
    2) The second Era
    3) Consists of:
    A) Triassic period
    B) Jurassic period
    C) Cretaceous period
  • Period: to

    Triassic

    1) 251,000,000 years ago
    2) First period of Mesozoic Era
    3) "The Age of Reptiles"
    4) New Mountains in N. America
    5) First dinosaurs
    6) Mammals appear
    7) Flying reptiles
  • Period: to

    Jurassic

    1) 199,000,000 years ago
    2) The age of dinosaurs
    3) Pangea Splits
    4) Warm climate = new species
    5) Abundant plant life
  • Period: to

    Cretaceous

    1) 145,000,000 years ago
    2) Break up of Gondwana
    3) Rising sea levels
    4) Tyrannosaurus rex
    5) Flower develops
    6) All land animals of over 50 pounds extinct
  • Period: to

    Cenozoic

    1) Final Era
    2) 65,500,000 years ago to present day
    3) "Age of Mammals"
    4) Humans develop