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History of Life on Earth

History of Life on Earth. How Did Life Begin – 2 Theories. 1929 - Oparin and Haldane Early atm. contained N 2 , H 2 , H 2 0, NH 3 and CH 4 These molecules underwent chemical reactions (sun, volcanoes, lightning) to create organic molecules. 1. Primordial Soup.

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History of Life on Earth

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  1. History of Life on Earth

  2. How Did Life Begin – 2 Theories

  3. 1929 - Oparin and Haldane Early atm. contained N2, H2, H20, NH3 and CH4 These molecules underwent chemical reactions (sun, volcanoes, lightning) to create organic molecules 1. Primordial Soup

  4. 1953 - Primordial Soup – Retested • Miller and Urey • Amino acids and other organic molecules were formed.

  5. Primordial Soup - Rejected • NH4 and CH4 would not have existed without ozone. • Without these gases, organic molecules are not made.

  6. Hydrothermal Vents • 2. Bubble Model (1986)

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