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A. circularDate: 2015-10-07; view: 502. B. central Choose the correct item. TEST 5 (UNIT 5-Igneous Rocks) Read the following texts: Volcanic rocks (pg 107.), Volcanic landforms (pg.108), Volcanic products (pg.109) in the SELF-STUDY BOOKLET 1.How many forms have volcanoes? A. two B. three C. four 2. Which of the following is not a volcano? A. fissure C. basalt 3. What is the typical volcanic shape? A. high steep-shaped mound B. cone-shaped mound C. flat-shaped mound 4. What is a magma chamber? A. a place where lave forms B. a reservoir of gas-rich rocks C. a reservoir of gas-rich molten rock under pressure 5. What word is used to describe how pressurized magma comes out? A. spits out B. spurts out C. balloons outward 6. What is the form of the vent on the Earth's surface? B. oval C. cone 7. The top of the volcano is usually A. an inverted crater B. an upside plate C. an circular cone 8. Which of the following is not a lava flow? A. aa B. basic C. pahoehoe 9. Aahas this name because: A. cooled rocks are soft B. cooled rocks are sharp C. cooled rocks are hot
10. Pahoehoe is a word taken from what language? A. American B. Indian C. Hawaiian 11. When a volcano erupts what fuses out of it? A. pyroclastic materials B. gases and junk C. solid materials 12. What is another word for fissure volcano? A. crack B. plateau C. linear 13. Pyroclastic materials include: A. ash, pumice and tuff B. ash, pumice and lava C. ash, tuff and rocks 14. What is ash? A. anything that shoots out of the volcano B. it is little stuff C. it is anything that is 2 mm or less. 15. What is the wrong conception of the term “ash“? A. it is the same as cinder B. it is fine in texture C. it is something soft and fluffy 16. What is a synonym for “pumice”? A. cooled lava B. volcanic glass C. magma with holes 17. How is tuff formed? A. by the consolidation of ash B. by the consolidation of pyroclastic materials C. by the consolidation of ash and pyroclastic materials 18. What is not the formation of igneous rocks? A. cooled lava or magma B. molten rocks C. ash and pyroclastic materials 19. How many major types of volcanic landforms are there? A. five B. six C. four
20. What is another word for “landform”? A. edifice B. structure C. shape 21. The physical structure of a volcano is: A. shape B. edifice C. form 22. What determines the shape of a volcano? A. type and consistency of the magma B. flow rate of the magma C. temperature of the magma 23.What makes lava thick and viscous? A. silicon B. iron and oxygen C. silica 24. If there is less silica, then lava is A. thicker and viscous B. thinner and runnier C. thinner and viscous 25. Ash and cinder cones are: A. lava cones B. explosion cones C. concave cones 26. Which of these have more silica?
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