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