Answer Key


Land Beneath our Feet Review Guide – ANSWER KEY __________________________________ Topic Layers of the Earth Question Name the layers of the earth from the outermost to the innermost. Describe the materials and composition of each layer of the earth. What are some examples of models of the earth? How do these models relate to the layers of the earth? How did the layers of the earth most likely form? Answer Crust, mantle, outer core, inner core Name Crust: Continental – made up of solid granite, Oceanic – made up mainly of Basalt Mantle: composed of molten rock Outer Core: Liquid Iron and Nickel Inner Core: Solid Iron and Nickel Hard Boiled Egg: Egg = Crust, Egg White = Mantle, Yolk = Outer Core, Inner Yolk (small circle) = Inner Core The layers of the earth formed due to the density of the materials in each layer. Page in the ISN Earthquakes and Volcanoes Plate Tectonics Where do earthquakes occur? Where do most volcanoes occur? Along plate boundaries, also called Fault Lines Along plate boundaries – Convergent: subduction zones where oceanic crust and continental crust meet (ie - Ring of Fire) or Divergent: underwater volcanic activity, not as destructive or spectacular as subduction zones Divergent, Convergent, Transform Name the three types of plate boundaries. Describe the type of motion at each type of plate boundary. Name a land feature or event that occurs at each type of plate boundary. Divergent Plates move away from each other, Convergent Plates move towards each other, and Transform Plates scrape back and forth past one another Divergent: Underwater Mountain Ranges, Volcanoes, Rift Valleys Convergent: Mountain Ranges, Ocean Trenches, Volcanoes Transform: Earthquakes Continental Drift Name the scientist who proposed the theory of continental drift. Alfred Wegener

Land Beneath our Feet Review Guide – ANSWER KEY __________________________________ What was wrong with his idea? Name He didn’t have an explanation for HOW the plates moved

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