GEOG Chapter 8 Exam Questions and Answers All Correct

GEOG Chapter 8 Exam Questions and Answers All Correct Marble is a familiar example of which type of rock? A) intrusive igneous B) metamorphic C) sedimentary D) extrusive igneous - Answer-metamorphic Which of the following is the fuel for continental drift and plate tectonics? A) nuclear fusion B) radioactive decay C) solar energy D) chemical reactions in Earth's core - Answer-radioactive decay Which of the following supports the continental drift concept? A) magnetic field patterns preserved in the rocks B) plant and animal fossil records C) radioactive decay dating of rocks on either side of a spreading center D) All of these support the theory. E) None of these is valid evidence of continental drift. - Answer-All of these support the theory Plate boundaries are associated with A) earthquakes. B) volcanoes. C) subduction. D) rifting. E) all of the above - Answer-all of the above At which of the following locations is new ocean crust being formed? A) rift zones B) along collision zones between two continents C) along collision zones between two oceanic plates D) in trenches - Answer-rift zones At which of the following locations does subduction occur? A) along collision zones between two continents B) at sea floor spreading zones C) above mantle hot spots D) along collision zones between continental and oceanic plates - Answer-along collision zones between continental and oceanic plates The ocean floor subducts under continents because A) the ocean floor has a lower density and therefore sinks more easily. B) the ocean floor is made of felsic minerals and is heavier than continental material. C) the ocean floor is made of mafic material and is therefore more dense than continental material. D) the weight of the continents is so great that they push the ocean floor material downward. E) both A and B - Answer-C) the ocean floor is made of mafic material and is therefore more dense than continental material. The ocean floor is a maximum of about 200 million years in age because A) the earth is only 200 million years old. B) the ocean floor is pushed up onto continental material during plate collisions. C) the ocean floor subducts during plate collisions. D) hot spots continuously destroy the ocean floor. E) None of the abovethe ocean floor is 3.96 billion years old. - Answer-C) the ocean floor subducts during plate collisions Which of the following are located along the midocean ridges? A) volcanoes B) outcrops of granite C) old oceanic sediments D) evaporite deposits - Answer-volcanoes Several large, linear lakes are forming in East Africa. This is evidence of what process? A) rifting B) subduction C) compression D) isostatic uplift - Answer-rifting The magma that fuels and produces the volcanic activity around the Pacific Ring of Fire is derived from the A) magma extruded from rift zones that are developing along the Pacific Rim. B) rise of material that was melted in subduction zones along the Pacific margins. C) rise of magma from hot spots, such as those that formed the Hawaiian Islands. D) rise of magma along transform faults. - Answer-rise of material that was melted in subduction zones along the Pacific margins. The Hawaiian Islands were formed as a result of A) a rising plume of magma from the mantle. B) an oceanic-oceanic plate collision. C) a continental-oceanic plate collision. D) activity along a midocean ridge. - Answer-a rising plume of magma from the mantle. Which of the following is true of divergent plate boundaries? A) Rifting occurs there. B) Tensional forces exist there. C) New ocean crust can be created there. D) all of these E) none of these - Answer-all of these Convergent plate boundaries are characteristic of A) sea-floor spreading centers. B) collision zones between plates. C) lateral motions of plates. D) all plate boundaries. - Answer-collision zones between plates. Which of the following is incorrect relative to hot spots across Earth's surface? A) Hot spots can occur beneath both oceanic and continental crust. B) They remain relatively fixed in relationship to the migrating plates. C) They are responsible for the formation of the Hawaiian-Emperor Islands chain. D) Hot spot activity is unrelated to the formation of Iceland, which sits atop a sea-floor spreading ridge in the North Atlantic. - Answer-Hot spot activity is unrelated to the formation of Iceland, which sits atop a sea-floor spreading ridge in the North Atlantic. Which of the following is not true of geothermal energy? A) It could be used everywhere. B) It's in use in Iceland, Japan, and California. C) Loss of aquifer pressure and groundwater drawdown can reduce production over time. D) It can be used to produce both heat and electricity. - Answer-It could be used everywhere. Pangaea is currently dated at A) 4.6 billion years ago. B) about half the timespan of Earth's existence. C) 225 to 200 million years ago. D) 65 million years ago. E) the beginning of the Holocene. - Answer-225 to 200 million years ago.