Earth Surface

hide step up1 RUNNING HEAD: Earth pass along Lisa Coleman Earth Surface August 8, 2011 Introduction to Physical lore Professor Olivia D. Uitto, Ph.D., J.D. Earth Surface2 1. What ar the layers of the cosmos called? The layers of the earth are known as the crust, the outer core, the intimate core, and the mantle. The crust is the outer(prenominal) layer which consists of slightly 10 miles of rocks. There are 2 types of crust, one(a) is set(p) down(a)stairs the oceans and the other makes up the continents. The crust that is located down the stairs the oceans is thinner than the one that makes up the continents besides seismic waves sustain across through and through the oceanic crust faster than they do through the continental crust. (Tillery, 2009) The coterminous layer is the mantle. This is the warmheartedness part of the earth. It makes up almost 85% of the weight and potty of the earth and is or so 1800 miles deep. The outer core is the next layer. It is about 3,000 miles beneath the earths surface and is made up of liquid resolve lava that consists of mainly iron and nickel. And lastly the inner core is the next layer. It is about 900 miles inward that is going toward the promenade of the earth. This layer is say to be a solid thump of iron and nickel. (author, 1998) 2. What is subduction?

Subduction is when one lithospheric ordered series is forced down below another home into the mantle when the plates are moving toward each other. The plate that is thicker moves underneath the less thick plate. This dish out makes rocks break and move along the fractures and is k! nown as faulting. The plate that is subducted moves in a jolt motion and this causes earthquakes. The place where this happens is called the subduction zone. This also forms an oceanic trench which is a deep, narrow dip in the earth. 3. What is likely the cause of melt down of mantle real(a) along convergent margins? Earth Surface3 When the subducted slab move down to roughly 100km water and other precarious materials are driven off, the water...If you desire to get a entire essay, order it on our website: BestEssayCheap.com

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