GEOL105 Lecture Notes - Lecture 14: Continental Crust, Oceanic Crust, Oceanic Basin
15 Mar 2016
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Document Summary
Earth is constantly changing: matter worked on by energy. Energy is either from within (internal) or external. Earth materials + energy = process >>> change: internal energy (heat within earth) drives deep processes: Volcanoes: external energy (solar) helps drive surface processes, heats oceans and atmosphere. In turn, drives water cycle, ocean circulation, weather: erosion, floods, landslides, coastal processes. Incoming light converted to heat in atmosphere, oceans and land: gravity. Creates pressure within the earth: mechanical energy. Seismic waves, ocean waves and tsunami (energy traveling through matter) Kinetic and potential energy: energy in all geologic processes is conserved. But converted from one form to another. Effects of life on geology: influences erosion and weathering, plays a big role in determining composition of the atmosphere, includes humans. People have one of the largest influences of any organism in earth"s history. Global population increase puts more people in harms way.
