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1. What term describes when one plate goes under another plate, as in the diagram below? Divergent boundary Transform boundary Subduction zone Mid-ocean ridge
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2. Which plate always goes “down” into the mantle? Why?
Oceanic crust because it’s denser Oceanic crust because it’s less dense Continental crust because it’s denser Continental crust because it’s less dense
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3. What two features should you expect to find whenever one plate goes under another plate? Volcanoes and mid-ocean ridges Trenches and mid-ocean ridges Mid-ocean ridges and abyssal plains Volcanoes and a trench
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4. Which of the following would NOT apply to a mid-ocean ridge?
Divergent boundary Crust is destroyed New crust is made Site of sea-floor spreading
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5. You would expect to find the youngest oceanic crust…
Near mid-ocean ridges Farther away from mid-ocean ridges Near subduction zones Next to beaches
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6. Which of the following is found at a transform boundary?
Andes Mountains Himalaya Mountains San Andreas Fault Mid-Atlantic Ridge
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7. Which of the following occurs at a transform boundary?
Fracturing of the crust Formation of new crust Recycling of crust Subduction
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8. Which of the following is NOT being depicted (or shown) in the diagram? Subduction zone Rifting Seafloor spreading Magnetic patterns on the ocean floor
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9. In which layer of the Earth are convection currents occurring?
Inner Core Lithosphere Outer Core Mantle
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10. What type of boundary exists between the Indian plate and the Eurasian plate? Divergent Convergent Transform
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11. What type of boundary exists between the North American plate and the Eurasian plate? Divergent Convergent Transform
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12. What type of rock makes up the ocean crust? Granite Basalt
Sandstone Limestone
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13. Which layer of the Earth contains 85% iron and 15% nickel and has the same composition as meteorites? Crust Mantle Core
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14. What did scientists use to determine all of the plate boundaries?
Location of trenches Location of mid-ocean ridges Location of volcanoes Location of earthquakes
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15. All of the following were used as evidence for sea floor spreading except Magnetic patterns on the ocean floor Age of the ocean crust Depth of the ocean Sediment thickness patterns on the ocean floor
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16. What is the main thing used to study all of Earth’s layers?
Drilling Sonar Seismic waves Satellites
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17. What theory saved Alfred Wegener’s idea of continental drift?
Evolution Big Bang Theory Seafloor Spreading Theory of Relativity
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18. Which layer of the Earth is brittle and is broken into plates?
Lithosphere Asthenosphere Mesosphere Core
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19. Which layer of the Earth behaves like a plastic and flows very slowly? Lithosphere Asthenosphere Mesosphere Core
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20. Which of the following is not one of the major features of the ocean floor? Craters Abyssal plains Trenches Mid-ocean ridges
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21. What is the deepest trench in the world? Aleutian Trench
Mariana Trench Peru-Chile Trench Japan Trench
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22. How fast do the tectonic plates move? Too slow to measure
About 10 feet per year About 2-10 centimeters per year Faster than a cheetah but slow than a jet
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