volcano sample testMultiple ChoiceIdentify the letter of the choice that best completes the statement or answers the question.____ 1. Volcanic belts form alonga. islands in the Pacific Ocean.b. North American mountain ranges.c. the boundaries of Earth’s plates.d. the coast of Antarctica.____ 2. The formation of the Hawaiian Islands is one example ofa. volcanoes forming over a hot spot.b. volcanoes forming along plate boundaries.c. the Ring of Fire.d. continental drift.____ 3. The viscosity of magma depends upon its silica content and itsa. pahoehoe.b. temperature.c. magnetism.d. pyroclastic flow.____ 4. The long tube in the ground that connects the magma chamber to Earth’s surface is called thea. vent.b. side vent.c. pipe.d. crater.____ 5. If a volcano’s magma is high in silica, the volcano will probablya. erupt quietly.b. remain dormant.c. erupt explosively.d. produce dark-colored lava.____ 6. Pahoehoe isa. cooler, slower-moving lava.b. fast-moving, hot lava.c. volcanic ash.d. lava with a rough, chunky surface.____ 7. When groundwater heated by magma rises to the surface and collects in a natural pool, it is called aa. hot spring.b. geyser.c. vent.d. pyroclastic flow.____ 8. In volcanic areas, groundwater heated by magma is a source ofa. lava flows.b. silica.c. geothermal energy.d. pyroclastic flows.____ 9. Which of the following volcano hazards is made up of rocky particles about the size of a grain of sand?a. volcanic bombsb. pahoehoec. volcanic cindersd. volcanic ash____ 10. The main hazard from a quiet volcanic eruption isa. volcanic gases.b. lava flows.c. geysers.d. pyroclastic flows.____ 11. Tall, cone-shaped mountains in which layers of lava alternate with layers of ash are calleda. shield volcanoes.b. cinder cone volcanoes.c. composite volcanoes.d. lava plateaus.____ 12. When many layers of thin, runny lava build up a high, level area, the result is aa. lava plateau.b. shield volcano.c. cinder cone volcano.d. composite volcano.____ 13. Which type of rock would you expect to form as the result of an explosive eruption?a. pahoehoeb. granitec. pumiced. aa____ 14. What is the landform that forms when a mass of hardened magma is uplifted, causing the layers of rock to bend upward?a. volcanic neckb. dikec. lava plateaud. dome mountain____ 15. The major ingredient of magma isa. pahoehoe.b. silica.c. dissolved gases.d. obsidian.____ 16. What can be used to identify a substance or to predict how it will behave?a. stages of activityb. physical and chemical propertiesc. geothermal activityd. viscosity____ 17. What triggers the small earthquakes that occur around a volcano before an eruption?a. upward movement of magmab. pyroclastic flowc. cooling magma inside the crustd. plate movements____ 18. All of the following are examples of physical properties EXCEPTa. melting point.b. hardness.c. ability to burn.d. density.____ 19. Before lava reaches the surface, the molten material is calleda. rock.b. magma.c. volcanic ash.d. liquid fire.____ 20. The volcanoes along converging oceanic plate boundaries may forma. a hot spot.b. a part of the mid-ocean ridge.c. an island arc.d. a subducting plate.____ 21. A mass of rock formed when a large body of magma cools inside the crust is called aa. neck.b. dike.c. lava plateau.d. batholith.____ 22. A volcano that may erupt again at some time in the distant future isa. active.b. dormant.c. explosive.d. extinct.____ 23. The huge hole left by the collapse of a volcanic mountain is called aa. lava plateau.b. caldera.c. cinder cone.d. shield volcano.____ 24. If geologists detect many small earthquakes in the area near a volcano, what can they infer about the volcano?a. It is dormant.b. It is probably about to erupt.c. It is extinct.d. It is a good source of geothermal energy.____ 25. Several kilometers from a volcano, a geologist observes an old lava flow made up of dark-colored basalt rock.The geologist infers that the lava must have hada. high silica content.b. high viscosity.c. low viscosity.d. medium viscosity. ____ 26. When ash, cinders, and bombs build up in a steep pile around a volcano’s vent, the result is aa. cinder cone volcano.b. shield volcano.c. composite volcano.d. dormant volcano.____ 27. When magma hardens in a volcano’s pipe, the result will eventually be a landform called aa. batholith.b. dike.c. volcanic neck.d. sill.____ 28. Magma that forces across rock layers hardens into aa. sill.b. volcanic neck.c. dike.d. batholith.____ 29. What provides the force that causes magma to erupt to the surface?a. the silica in the magmab. dissolved gases trapped in the magmac. gravity in the lithosphered. the density of the magma____ 30. Which of the following helps to determine how easily magma flows?a. the amount of silica in the magmab. the diameter of the pipec. the size of the craterd. the number of vents on the volcanoModified True/FalseIndicate whether the sentence or statement is true or false. If false, change the identified word or phrase to make the sentence or statement true.____ 31. Viscosity increases as temperature increases. _____________________________ 32. A dike forms when magma forces itself between rock layers and hardens. _____________________________ 33. Ash, cinders, and bombs build up in a steep pile to form cinder cone volcanoes. _____________________________ 34. Volcanoes that form along a mid-ocean ridge occur at a(n) diverging plate boundary. _____________________________ 35. Dissolved minerals trapped in magma under tremendous pressure provide the force for a volcanic eruption. _____________________________ 36. A pyroclastic flow typically occurs during a(n) quiet eruption. _____________________________ 37. A(n) dormant volcano is erupting or may erupt in the near future. _____________________________ 38. Magma sometimes forces its way out of the side of a volcano through a(n) vent. _____________________________ 39. During a quiet eruption, a(n) lava flow may set fire to and then bury everything in its path. _____________________________ 40. The greater the viscosity of a liquid, the slower it flows. _________________________CompletionComplete each sentence or statement.41. A(n) ____________________ is a substance that cannot be broken down into other substances.42. A substance made of two or more elements that have been chemically combined is a(n) ____________________.43. A mass of rock that forms when a large body of magma cools inside the crust is called a(n) ____________________.44. Hardened magma in a