Period 5 Steiner Fiore Nguyen

Timeline created by 2013steineca
  • (5BYA) Solar System

    (5BYA) Solar System
    Big swirling mass of gas began to form into the solar system
  • (4.6 BYA) Earth

    (4.6 BYA) Earth
    The Earth began to form and grew by colliding with space debris
  • (4BYA) Atmosphere

    (4BYA) Atmosphere
    Volcanoes emit gas forming an atmosphere
  • (3.5BYA) Fossils

    (3.5BYA) Fossils
    Fossils of stromatolites were as old as 3.5 billion years
  • (3BYA) Cyanobacteria and lynbgya

    (3BYA) Cyanobacteria and lynbgya
    Cyanobacteria and lynbgya had began to photosynthesise
  • (2.2 BYA) Earth

    (2.2 BYA) Earth
    Earth looks mostly like what it is today
  • (2BYA) Oxygen

    (2BYA) Oxygen
    O2 levels reached todays levels
  • (2BYA-1.5BYA) Prokaryotic life forms

    (2BYA-1.5BYA) Prokaryotic life forms
    A type of small aerobic prokaryotic life forms was engulfed by and began to live and reproduce inside of a larger anaerobic prokaryote
  • (1BYA) Ozone

    (1BYA) Ozone
    Ozone (O3) formed - protected from harmful UV rays so they could exsist on land
  • (1665) Microscopes

    (1665) Microscopes
    An early light microscope was used by Robert Hooke to study nature. Other scientists observed from microscopes that mircoorganisms are simple in structure and are numerous and wide spread.
  • (1668) Redi's experiment

    (1668) Redi's experiment
    Discovered that flies only come from eggs laid by other flies.
  • (1700s) Spallanzani's experiment

    (1700s) Spallanzani's experiment
    Discovered that boiled broth became contaminated only when microoganisms from the air entered the flask.
  • (mid-1800s) Pasteur's experiment

    (mid-1800s) Pasteur's experiment
    Discovered that contamination of the broth was due to microorganisms in the air.
  • (1920s) Oparin's hypothesis

    (1920s) Oparin's hypothesis
    Thought the early atmosphere contained ammonia, NH3 (hydrogen gas), H2 ( water vapor), H2O, and compounds made of hydrogen and carbon. Oparin thought at high temperatures these gases might have formed simple organic compounds.
  • (1950) Radiometric dating

    (1950) Radiometric dating
    Used to establish ages of materials like fossils.
  • (1953) Urey and Miller

    (1953) Urey and Miller
    Used Opain's hypothesis to produce a variety of organic compunds and amino acids.
  • (mid-1950s) Sidney Fox

    (mid-1950s) Sidney Fox
    Extensive research on the physical structures that meny have given rise to the first cells (microshperes and coacervates).
  • (early 1980s) Thomas Cech

    (early 1980s) Thomas Cech
    Found that a type of RNA found in some unicellular eukaryotes is able to act as a chemical catalyst.
  • (1980s) Lynn Margulis

    (1980s) Lynn Margulis
    Proposed that early prokaryotic cells may have developed a mutually beneficial relationship.