Survey
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Types of Plate Boundaries Ridge Push and Slab Pull 1) Identify (name) the type of plate boundary that causes rifts in Earth’s surface. 2) Describe what happens when oceanic and continental lithosphere collide. (HINT: describe what happens to each piece of lithosphere and name any topographic features created.) 3) Describe the relative motion depicted in the diagram of a transform boundary. 4) Sometimes plates at transform boundaries slide past each other relatively smoothly. At other times they stick, and tension builds up along the fault. Identify which condition would most likely produce the severe earthquake. Explain your answer. 5) Earth’s lithosphere is constantly being created and destroyed. Identify which diagrams show these two complementary processes at work. Explain your answer. 6) Study the “ridge push” diagram. Identify which is denser—newly formed lithosphere or older lithosphere. Explain your answer. Explain your answer. 7) Describe the direction ridge push moves lithosphere relative to the mid-ocean ridge. 8) Study the “slab pull” diagram. Identify which of the two plates shown (the plate on the left or the plate on the right) contains the densest lithosphere. Explain your answer. 9) The edge of the subducting plate pulls the rest of the plate behind it down into the asthenosphere. Identify the characteristic (property) of the subducting lithosphere that causes this slab pull. 10) Explain how mantle convection causes plate motions such as ridge push and slab pull.