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GSU - PHYS 1149 - Week 1 Notes - Class Notes

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School: Georgia Southern University
Department: OTHER
Course: Environmental Physics
Professor: Anastasia Rusina
Term: Spring 2019
Tags:
Name: Week 1 Notes
Description: These notes are part of Chapter 1.
Uploaded: 01/24/2019
48 Pages 21 Views 16 Unlocks
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School: Georgia Southern University
Department: OTHER
Course: Environmental Physics
Professor: Anastasia Rusina
Term: Spring 2019
Tags:
Name: Week 1 Notes
Description: These notes are part of Chapter 1.
Uploaded: 01/24/2019

Unformatted text preview: environment Chapter 1: A Changing Planet What is Envyronment? vironment: Sum total of everything that Px Environmen Surrounds UN - Living beings constantly interact with their * Any changes to the environment affect life = changes could be natural or anthropogenic Interdisciplinary in nature that brings together the ideas' from all branener of physic sciences "The Earth -Earth in the third planet from the sun the largest, of, the A terrestrial planeta - the densest planet in Solarsystem restee of the Earth - The age of Earth is 4.5 billion years ibulien, 10 e Radiometric dating is based on a comparison between Theo bperved a bundance of naturally occurring radioactive isotope and its decay products, using Known decay rates - The Ordest minerals ve far dated on farth are zircons from Jack Hill Formation of Earth Nebular Hypothesis Polar system formed from,d cloud of dust and 995 that collapsed under its own granity - Composition of the molecular cloud ! 967' (hydrogen and helium) 2% (dust) e-where all other elements come from? cutellar nucleosynthedom Formation of color vetem Heating, spioning 'a'ftening-Birth of Sun UVO SUSTOTM miclear Fusion reaction, nas Core of the Collapsing, region w hot and denne enough to start and sustain nuclear zor brighter ruun'y, brightness increases with time. Hogy than when it was bom Birth Of olamets ni Condensation of rocks and metaly in ter plane hanetesimale combine to form plan It takes million board for this pro QoFructure of the Earth tarth'r Internal Utructure -Earth war in a Denr rt camera completely molten state when it componente fubefeptent to the core and the lightest med DUT A Study Soup Gorem ante, Crust and atten Crust and top lauer of minte cudities - minor portion of the mantle Trotill m ten magma -Convection current in the mantle arirnd earthquakes Tectonics Causing volcanic eruptions and ourquune ou fructure of Earths hore - Origin Of Continentor, Oceans + Atmosphere ... Continents: Crust colidifier and thickens reducing the atrength ang frequency of volcanic eruetions, AYSO. the thin rust fragment form continental and ocean plater e oceand condensation of steam from volcanic vents lama bombardment of icy comets, give rise to oceans e Atmosphere to the crust colidifies the gaser dissolved in the rocks steam out and remain, gravitationally, bound to Earth forming ito atmosphere le Earth's atmosphere Atmospheric composition of young tarth1999 major components: Mitrogen and Carbon dioxide heric com os 111on of farth today Nitrogen en propietarg 68.934.) o Earth'o Atmosphere. * What happened to carbon dioxide? Geochemical remoral _C0 requester in rocks through carbonic acid s biological removal atmosphere and vinic to the deep ocean urrum m Edri photosynthetic ingeniums took Co2 from the Photosynthesis cha Horynthetic process removes carbon dioxide releaser oxygen and sun porcing it to glucore and 6CO2 + 6H20 Lotinyl Co H202 + 602 e Why was Oxygen absent in the atmosphere of young man is highly reactive and has a strong tendency to form oxides Structure of the Atmosphere (1) Troporphere oito The lowest, most dense layer. Weather occurs (2) Stratosphere Temperature increases with altitude (why?) Calzone laver filters 95% -99% of W os merosphere ca meteors hum here (4) Thermocphere Soup