ESC 1000 Chapter 5: Chapter Five Notes
8 Apr 2016
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Document Summary
Earth consists of concentric layers that have diferent composiions and strengths. 35 40 km (20 25 mi) in thickness. Composed of the crust and uppermost mantle. Hoter than the lithosphere and can low under pressure. Funcions as a sot, weak zone over which the lithosphere may move. An object loats on top of another object because it has a lower density. Isostacy the concept of diferent thicknesses of crust riding on the mantle. Thick mountain belt roots support less dense crustal elements. Oceans make up 71% of the earth"s surface, with less than 2% made up of islands and the rest of coninents. North america, south america, europe, africa, asia, oceania, and antarcica. Main types of features in coninents and oceans. Abyssal plain smooth and moderately deep sea loors. Coninental shelves submerged shallow benches that are bulges of coninents. Ocean trench deepest part of the oceans. Island arcs curving chains of islands, most are inacive volcanoes.
