Earths Early History Early Conditions Hot Volcanic Lightning

Early Conditions • Hot, Volcanic • Lightning • Early atmospheric gases of: – Ammonia

Plate Tectonics • Movement of the Earth’s crustal plates over it’s molten core. •

Radiocarbon Dating • A method of dating rocks and fossils using the breakdown of

Oparin’s Hypothesis • States that energy in UV radiation and lightning stimulated chemical reactions

Miller and Urey’s Experiment • Tested Oparin’s hypothesis • Were able to obtain amino

Organic Molecules to life • The theory goes: Amino acids may have formed polymers,

Problems with origin theories • 1. Cannot, and has not been proven. • 2.

Slides: 8

Download presentation

Earth’s Early History? ? ?

Early Conditions • Hot, Volcanic • Lightning • Early atmospheric gases of: – Ammonia – Methane – Carbon Dioxide – Nitrogen

Plate Tectonics • Movement of the Earth’s crustal plates over it’s molten core. • Pangaea was the supercontinent that was broken apart. • Causes Earthquakes, volcanoes, building of mountain ranges.

Radiocarbon Dating • A method of dating rocks and fossils using the breakdown of radioactive isotopes. • C 14 only accurate for 50, 000 years. • Is the source of much debate and disagreement over accuracy issues.

Oparin’s Hypothesis • States that energy in UV radiation and lightning stimulated chemical reactions in the ancient atmosphere. • Over millions of years, it may have produced organic molecules.

Miller and Urey’s Experiment • Tested Oparin’s hypothesis • Were able to obtain amino acids, ATP, and nitrogen bases.

Organic Molecules to life • The theory goes: Amino acids may have formed polymers, which may have formed protocells, which may have formed real cells. • The Heterotroph Hypothesis • Endosymbiosis

Problems with origin theories • 1. Cannot, and has not been proven. • 2. Has never been duplicated in a lab. • 3. Agrees with spontaneous generation, which is shown to be false! • 4. Disagrees with the cell theory! – “All cells come from pre-existing cells. ”