Week one notes
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This 2 page One Day of Notes was uploaded by Janey Lyon on Thursday January 15, 2015. The One Day of Notes belongs to GEOG 3230 at University of Utah taught by Carter in Spring2015. Since its upload, it has received 85 views. For similar materials see Pyrogeography in Geography at University of Utah.
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Date Created: 01/15/15
Wednesday January 14 2015 THE ORIGIN OF FIRE What is fire Burning combustion and oxidation Three necessary elements Oxygen Fuel and Ignition Oxidation chemically combined with oxygen exothermic reaction gives of heat and light like oxidation endothermic absorbs heat and light Oxygen began accumulating 2 billion years ago Earth is about 4 billion years old for the first 2 billion years there was a lot of sulfuric and carbon dioxide gasses on Earth that kept life from being able to thrive 23 billion years ago blue green algae began to bloom and produce Oxygen about 500000 million year ago those Oxygen levels filled to modern oxygen levels 400 million years ago plant life began to grow which created fuels for fire Fire did not happen until plant fuels began growing GEOLOGIC TIME Protoezaric era Oxygen begins to accumulate Paleozoic era Modern Oxygen levels at 21 Oxygen Devonian era Plant fuels begin to grow Precambrian era makes up 88 of Earth s history IGNITION sparks Volcanism There are about 1520 active volcanoes world wide so they aren t very consistent in igniting flames Meteors rarely hit the Earth these days Falling rocks which are usually human caused Wednesday January 14 2015 lightening is the biggest and most consistent ignition source LIGHTENING forms and accumulation of electrical charges in clouds Hot strikes are slow long and create more energy cold strikes are fast and rarely catch fire as clouds separate positive and negative neutrons separate that create and electromagnetic field that is attracted to the negative energy at the bottom of the clouds Florida has the most days with thunderstorms however the western states experience the most lightening ignition due to extremely dry climates
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