Globe west 2048

period 2, Manley , History of earth

By 2013manleyru

  • (5 B.Y.A) Event & Description of Geologic Events

    Swirling mass of gas and dust

  • (4.6 B.Y.A) Event & Description of Geologic Events

    The age of planet earth

  • (4 B.Y.A)Events & Description of Geologic Events

    The oldest known rocks & crystals .

  • (4 B.Y.A) Event & Description of life events

    most cells were all heterotroph

  • (3.5 B.Y.A) Event & Description of life events

    fossils of stromatolites are known

  • (3 B.Y.A) Event & description of life events

    some porchs of life were photosynthetic

  • (2.2 B.Y.A) Event & description of Geologic events

    appeared similiar to todays world

  • (2.2 B.Y.A) O2 levels reached todays levels

  • (1.5 B.Y.A) Events & Description of life events

    A type of small aerobic procaryote was engulfed by & began to live & reproduce inside a larger, anerobic prokaryote .

  • (1 B.Y.A) Ozone(o3) formed-protected organisms from harmful uv rays so they could exist on land

  • Redi

    noticed & described different developmental forms of life

  • first microscopes

    instrumental using optical lenses to magnify objects by bending light rays

  • Spallanzani

    Designed an experiment to test the hypothesis of spontaneous generation of microorganisms

  • Pasteurs

    Made a curve-necked flask that allowed air inside the flask to mix w/ air outside the flask

  • Fox

    extensive research on physical structures that gave rise to first cells

  • Thomas Cech

    type of RNA found in some unicellular Eukaryotes act as a chemical catalyst

  • Oparin

    thought early atmosphere contained ammonia,NH3; hydrogen gas,h2; water vapor, h2o. high temperatures gases might form amino acids .

  • Radiometric Dating

    establishing the age of materials including the

  • Urey & Miller

    produced a variety of organic compounds, including amino acids .

  • Margulis

    proposed that early prokaryotic cells may have developed a mutual beneficial relationship