Where east antarctica why increased snowfall 4 list

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Where: East Antarctica Why: increased snowfall 4. List and describe the eroded features in mountain ranges that glaciers leave behind
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-Sharpen mountains and gouge valleys as they move rock in the earth creating fjords, or Aretes sharpen mountains and gouge valleys as they move rock in the earth creating fjords, or Redies, and horns 5. Elaborate on 1) how glaciers move 2) how fast they move, and 3) how they cause erosion How they move: gravity drags glaciers down hill toward the ocean like rivers or sheets of ice How fast they move: 1 inch to 1 mile per year on average -plucking; melt and refreeze incorporates rocks and boulders -creates sandpaper affect( abrasion and gouging) 6. What are the three causes of sea level rise? At what rate is sea level currently rising? How much will it rise by 2100? 3 causes: 1) Global ice melt 2) thermal expansion of warming ocean 3) ground water reclamation -1/8 of an inch per year or 1 foot per century -By 2,100, sea level is estimated to rise 3 to 7 feet PLATE TECTONICS 1. Explain the theory of plate tectonics in a sentence or two. - the outer rigid layer of the earth (the lithosphere) is divided into a couple of dozen “plates”. They move around across the earths surface relative to each other, like slabs of ice on a lake. 2. Describe the three-part CAUSE of plate movement. Part 1:nuclear energy = heat (uranium & iridium) Part 2: heat in the mantle = convection currents Part 3: convection in mantle drags crustal plates 3. List all basic characteristics of oceanic crust. -“Si-Ma” silicon/magnesium blend -3-5 miles thick, covers 65% of earth -denser than continental crust 4. List all basic characteristics of continental crust. -“Si-al” silicon/aluminum blend (infinitely recyclable) -20-50 miles thick, covers 35% of earth -less dense than oceanic crust
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5. What are three pieces of evidence supporting the theory of continental drift?
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