1. Which of the locations listed below is least associated with a volcanically active plate boundary? A. Mid-ocean ridge B. Deep ocean trench C. Transform fault D. Continental Rift Interactions at plate boundaries depend on the direction of relative plate motion and the type of crust.

2. Which of the locations listed below is least associated with a volcanically active plate boundary? A. Mid-ocean ridge B. Deep ocean trench C. Transform fault D. Continental Rift Interactions at plate boundaries depend on the direction of relative plate motion and the type of crust.

3. Which kind of plate boundary is associated with Earthquake activity? A. Divergent Boundary B. Convergent Boundary C. Transform-fault Boundary D. All of the above

4. Interactions at plate boundaries depend on the direction of relative plate motion and the type of crust. Which kind of plate boundary is associated with Earthquake activity? A. Divergent Boundary B. Convergent Boundary C. Transform-fault Boundary D. All of the above

5. Considering either the whole mantle or stratified mantle convection models, at which kind of plate tectonic boundary is the upper part of the mantle (asthenosphere) rising? A. Divergent boundaries B. Convergent boundaries C. Transform boundaries Two competing hypotheses for the mantle convection system.

6. Considering either the whole mantle or stratified mantle convection models, at which kind of plate tectonic boundary is the upper part of the mantle (asthenosphere) rising? A. Divergent boundaries B. Convergent boundaries C. Transform boundaries Two competing hypotheses for the mantle convection system.

7. Evidence for magnetic reversals has been primarily preserved in: A. metamorphic rocks near convergent plate boundaries B. limestone and shale accumulating in shallow ocean basins C. active dune fields in the arid regions of the world D. extrusive igneous rocks associated with mid-ocean ridges Seafloor Spreading

8. Evidence for magnetic reversals has been primarily preserved in: A. metamorphic rocks near convergent plate boundaries B. limestone and shale accumulating in shallow ocean basins C. active dune fields in the arid regions of the world D. extrusive igneous rocks associated with mid- ocean ridges Seafloor Spreading

9. Absolute ages obtained from igneous rocks samples recovered from mid-ocean ridges reveal that: A. rocks ages get older with greater distance from the axis of the spreading ridge B. the pattern of rock ages is mirrored on each side of the spreading ridge C. the duration of each magnetic interval is the same across the axis of the spreading ridge D. all of these E. None of these Seafloor Spreading

10. Absolute ages obtained from igneous rocks samples recovered from mid-ocean ridges reveal that: A. rocks ages get older with greater distance from the axis of the spreading ridge B. the pattern of rock ages is mirrored on each side of the spreading ridge C. the duration of each magnetic interval is the same across the axis of the spreading ridge D. all of these E. None of these Seafloor Spreading

11. Which of the following components within an igneous rock are most responsive to the direction of the Earth’s magnetic field? A. quartz B. feldspar C. iron D. magnesium Seafloor Spreading

12. Which of the following components within an igneous rock are most responsive to the direction of the Earth’s magnetic field? A. quartz B. feldspar C. iron D. magnesium Seafloor Spreading

13. Subduction is a tectonic process that happens at which type of plate boundary? A. convergent B. divergent C. transverse D. hot spot Plate Tectonics: Subduction

14. Subduction is a tectonic process that happens at which type of plate boundary? A. convergent B. divergent C. transverse D. hot spot Plate Tectonics: Subduction

15. What causes oceanic crust to subduct when it is confronted by another oncoming plate? A. temperature B. strain C. density D. elasticity Plate Tectonics: Subduction

16. What causes oceanic crust to subduct when it is confronted by another oncoming plate? A. temperature B. strain C. density D. elasticity Plate Tectonics: Subduction

17. Why is molten magma rising to the surface at divergent plate boundaries? A. because it is more dense than the hotter rock around it B. because it is affected by anti-gravity C. because it is less dense than the cooler rock surrounding it D. it is pure chance that magma rises at these boundaries Divergent Boundaries

18. Why is molten magma rising to the surface at divergent plate boundaries? A. because it is more dense than the hotter rock around it B. because it is affected by anti-gravity C. because it is less dense than the cooler rock surrounding it D. it is pure chance that magma rises at these boundaries Divergent Boundaries

19. How long did it take to form the modern continental arrangement since the breakup of Pangaea? A. 750 Ma B. 200 Ma C. 500 Ma D. 50 Ma Assembly and Breakup of Pangaea

20. How long did it take to form the modern continental arrangement since the breakup of Pangaea? A. 750 Ma B. 200 Ma C. 500 Ma D. 50 Ma Assembly and Breakup of Pangaea

21. Based on the present directions of plate motions, which of the following should occur over the next 50 million years? A. North America will separate from South America. B. Australia will collide with Antarctica. C. Africa will collide with Eurasia. D. The Atlantic Ocean Basin will close. Assembly and Breakup of Pangaea

22. Based on the present directions of plate motions, which of the following should occur over the next 50 million years? A. North America will separate from South America. B. Australia will collide with Antarctica. C. Africa will collide with Eurasia. D. The Atlantic Ocean Basin will close. Assembly and Breakup of Pangaea