ES 105 - ES 105 1/18/11 Final: Wednesday May 11th...

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ES 105 1/18/11 Final: Wednesday May 11 th 9:00-11:00 am (Not Cumulative) 1/20/11 Chapter 1 – Philosophy and Fundamental Concepts - Inception 4.6 billion years ago - Many changes over time, the environment and bio-extinction Time - The big difference between geology and other sciences is: Time - Rates of geologic process: um/year to cm/year - Big earthquakes maybe displace the ground several meters in a few seconds, but only about every 500 yrs - We can use the fossil record to determine when species (such as humans) showed up. - Life is marked by the quick development of species with periodic mass extinction - 2450-2200 Mya (million years ago) oxygen appears in the atmosphere - Very small algae began to produce oxygen in the atmosphere 2200 mya Origin of the Solar System - Universe begins 14 bya (billion years ago) with the big bang - Nebula Hypothesis - States that all the masses of gas converged on the center pulled by gravity - As the gas cloud becomes more dense the gases begin to collide and create
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This note was uploaded on 08/28/2011 for the course EARTH SCIE 105 taught by Professor Fagherazzi during the Spring '11 term at BU.

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ES 105 - ES 105 1/18/11 Final: Wednesday May 11th...

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