TIM CLIFFE – Earth Science Dept. YOUR NAME __________________________________________ ASSIGNMENT #4 – Earth Layering A) COMPARE CRUSTAL-TYPES: Write either “Oceanic” or “Continental” +1 Point a) “mafic” Silicate minerals = __________________ B) b) more-dense Crust = __________________ c) thinner Crust = __________________ d) “granitic” rock = __________________ MATCHING: For each of the following statements on the left, choose the +2½ Points best choice from the right (write a letter between a through f; each choice can be used as often as needed): _____ Exists in the liquid state _____ Oxidized; primarily composed of Silicate minerals + a. Crust _____ Metallic; not composed of Silicates b. Mantle c. Outer Core d. Inner Core _____ The upper-portion of the Lithosphere e. the entire Core (including Felsics, Mafics, and/or Ultramafics) (i.e., both (c) and (d)) _____ Its upper-portion contains both the lower-Lithosphere and the entire-Asthenosphere f. both Crust and Mantle (i.e., both (a) and (b)) _____ The least-dense layer C) TRUE/FALSE (write T for TRUE, F for False): +2½ Points _____ The Lithosphere is a “plastic-solid;” it has the ability to flow or deform when forces are applied _____ The Asthenosphere is differentiated from the Lithosphere based on differences in material state, not on differences in material composition _____ The Cuyamaca Mtns have thicker Lithosphere than does the Imperial Valley _____ Isostatic adjustment of the Lithosphere occurs upward upon significant erosion of a mountain range _____ Isostatic adjustment of the Lithosphere occurs upward upon significant accumulation of sediments in a depositional basin + +4 Points D) (1) On the diagram below, label the core. (2) Then, accurately draw the location of the lithosphere and asthenosphere. (Do so in any sensible manner, including most easily as it was done on the video. Attempt to indicate the top and bottom of each as accurately as possible at this scale. Labels can be added to the left of the diagram.) (3) Circle the correct answer: If your additions to the diagram were done correctly, they should extend down only at the most to: A / B / C (4) (a) In the space below, draw an enlargement of the upper-portion of the diagram above; your diagram should extend from the surface down to the ~300 km (~180 mile) depth. (b) Then correctly-show, clearly-delineate, and accurately-label the following: Lithosphere, Asthenosphere, Crust, upper-Mantle, and the “Moho”
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