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7 Written questions

6 Multiple choice questions

  1. subduction, convergent
  2. oceanic
  3. 15
  4. ridges
  5. lava
  6. <50% SiO2, very fluid, non-explosive, quiet, low viscosity, divergent associated with oceanic crust.

6 True/False questions

  1. What is divergent?plates moving toward one another


  2. Caldera formation from collapsed craters are like?cracks


  3. Stratovolcanoes form by alternating __ of pyroclastic material (ash) and thick __ flows.eruptions, lava


  4. Shield volcanoes due to extensive outpouring of __/basaltic lava with little pyroclastic material.mafic


  5. Igneous rocks form by the?solidification of magma or lava


  6. Importance of igneous rocks?building materials, ores


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