<p>QUIZ 6</p><p>1. The Hawaiian Islands are composed of what type of volcanoes? </p><p> o A) shield </p><p>2. The degree to which a substance resists flow is known as ______. </p><p> o E) viscosity </p><p>3. The igneous rock in the figure above has what type of texture? </p><p> o A) glassy </p><p>4. A ______is a mixture of molten and solid rock. </p><p> o C) fractional melt 5. The figure above is an igneous rock with what type of texture? </p><p> o A) vesicular </p><p>6. The figure above has what type of texture? </p><p> o D) porphyritic 7. Which of the following terms best describes the lava in the figure above? </p><p> o A) low viscosity </p><p>8. The smallest type of tephra is known as ______. </p><p> o B) volcanic ash </p><p>9. Fine grained igneous rocks have a ______texture. </p><p> o A) aphanitic </p><p>10. Tsunamies, tremors, lahar, changes in global temperature, and acid rain are secondary hazards associated with ______</p><p> o B) earthquakes </p><p>11. Rock textures associated with rocks formed internally produce ______and externally form produce ______respectively. </p><p> o A) large and small crystals 12. A sill is a ______intrusion, whereas a dike is a ______intrusion. </p><p> o D) horizontal, vertical </p><p>13. Volcanoes are located in which type of plate boundaries? </p><p> o C) convergent (subduction zone) True/False</p><p>14. The presence of higher amounts of water usually lowers the melting temperature of the rock. </p><p> o TRUE </p><p>15. Hawaiian eruptions are extremely violent and produce large pyroclastic flows.</p><p> o FALSE </p><p>16. Igneous rocks high in feldspars and silicates are known as felsic rocks. </p><p> o TRUE </p><p>17. Vulcanian eruptions are not very explosive and only release ash 5km into the air. </p><p> o FALSE </p><p>18. Igneous rocks with small crystals undergo slow cooling. </p><p> o FALSE Fill-In-The-Blank</p><p>19. The most violent volcanic eruptions in history are classified as ______eruptions. PLINIAN</p><p>20. When magma is injected horizontally between layers and solidifies, a ______forms. SILL</p>