GEOGRAPH 110 Lecture Notes - Lecture 2: Archaea, Hadean, Cyanobacteria
GEOGRAPH 110 verified notes
2/2View all
Document Summary
Agenda: earth"s terrain (molten hell to hospitable home) and the role of bacteria and plants. The earth began forming 4. 65 billion years ago. As a product of the bending of time and space, an explosion of hot gasses begins to aglomerate and the earth is formed out of this accretion of materials. The moon was created 4500 mya when a mars-sized object collided with the. Earth, ejecting debris into space which accreted and became our moon. We know this because there is more dense iron in our earth than there should be, meaning this collision caused lighter metals to detach from the planet. Too hot for large bodies of water, no oxygen. Continents and oceans begin to form, 1% oxygen in the air towards the end. Ancient bacteria and cyanobacteria present in a primordial soup. Amino acids formed peptide chains which formed proteins which formed dna and rna, but his process could also be reversed.
