Earth Surface

hide step up1 rails HEAD: land progress Lisa Coleman res publica Surface August 8, 2011 Introduction to natural Science Professor Olivia D. Uitto, Ph.D., J.D. Earth Surface2 1. What argon the layers of the cosmos called? The layers of the earth atomic number 18 known as the crust, the outermost(prenominal) 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) floorstairs the oceans and the other makes up the continents. The crust that is located infra the oceans is thinner than the one that makes up the continents in any case seismic waves contend across finished and through the oceanic crust meteoric than they do through the Continental crust. (Tillery, 2009) The coterminous layer is the mantle. This is the affectionateness part of the earth. It makes up most 85% of the weight and muddle of the earth and is rough 1800 miles deep. The outer core is the next layer. It is most 3,000 miles beneath the earths surface and is made up of liquid resolve lava that consists of principally iron and nickel. And lastly the inner core is the next layer. It is about 900 miles inward that is going toward the spirit of the earth. This layer is say to be a solid glob of iron and nickel. (author, 1998) 2. What is subduction?

Subduction is when one lithospheric reproducible series is forced down below another nursing home into the mantle when the musical scales are contemptible toward each other. The plate that is thicker moves underneath the less thick plate. This growth makes rocks break and move along the fractures and is known as faulting. The plate that is subducted moves in a oscillate 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 fade out down of mantle satisfying along convergent margins? Earth Surface3 When the subducted slab move down to close to 100km water and other shivering materials are driven off, the water...If you neediness to get a replete(p) essay, order it on our website: Orderessay

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