1. < BackNext >PreviewMain Plate Tectonics Chapter 7 Preview CRCT Preparation

2. < BackNext >PreviewMain Chapter 7 CRCT Preparation 1. How do mid-ocean ridges support both the idea of continental drift and the theory of plate tectonics? A Oceanic lithosphere is destroyed at mid-ocean ridges. B New crust forms at mid-ocean ridges. C Tectonic plates collide at mid-ocean ridges. D The crust at mid-ocean ridges is old oceanic lithosphere.

3. < BackNext >PreviewMain Chapter 7 CRCT Preparation 1. How do mid-ocean ridges support both the idea of continental drift and the theory of plate tectonics? A Oceanic lithosphere is destroyed at mid-ocean ridges. B New crust forms at mid-ocean ridges. C Tectonic plates collide at mid-ocean ridges. D The crust at mid-ocean ridges is old oceanic lithosphere.

4. < BackNext >PreviewMain Chapter 7 CRCT Preparation 2. Which of the following compositional layers makes up the greatest percentage of Earth’s mass? A continental crust B oceanic crust C the mantle D the core

5. < BackNext >PreviewMain Chapter 7 CRCT Preparation 2. Which of the following compositional layers makes up the greatest percentage of Earth’s mass? A continental crust B oceanic crust C the mantle D the core

6. < BackNext >PreviewMain Chapter 7 CRCT Preparation 3. How does fossil evidence support Wegener’s hypothesis of continental drift? A Similar fossils found on far apart landmasses suggest that the continents were once a single landmass. B Fossil evidence suggests that the continents have always been in their current positions. C No similarities exist between fossils on different continents. D Plant and animal fossils show evidence of changes in Earth’s polarity.

7. < BackNext >PreviewMain Chapter 7 CRCT Preparation 3. How does fossil evidence support Wegener’s hypothesis of continental drift? A Similar fossils found on far apart landmasses suggest that the continents were once a single landmass. B Fossil evidence suggests that the continents have always been in their current positions. C No similarities exist between fossils on different continents. D Plant and animal fossils show evidence of changes in Earth’s polarity.

8. < BackNext >PreviewMain 4. Most of the world’s folded mountains formed as a result of A oceanic-oceanic separation at mid-ocean ridges. B continental-continental separation at rift zones. C continental-oceanic collision at subduction zones. D continental-continental collision at convergent boundaries. Chapter 7 CRCT Preparation

9. < BackNext >PreviewMain Chapter 7 CRCT Preparation 4. Most of the world’s folded mountains formed as a result of A oceanic-oceanic separation at mid-ocean ridges. B continental-continental separation at rift zones. C continental-oceanic collision at subduction zones. D continental-continental collision at convergent boundaries.

10. < BackNext >PreviewMain Chapter 7 CRCT Preparation 5. Which of the following geologic features forms as a result of tension? A an anticline B a syncline C a normal fault D a reverse fault

11. < BackNext >PreviewMain Chapter 7 CRCT Preparation 5. Which of the following geologic features forms as a result of tension? A an anticline B a syncline C a normal fault D a reverse fault

12. < BackNext >PreviewMain Chapter 7 CRCT Preparation 6. Scientists think that all of the present-day continents were once joined in a single supercontinent called A Pangaea. B Panthalassa. C Laurasia. D Gondwana.

13. < BackNext >PreviewMain Chapter 7 CRCT Preparation 6. Scientists think that all of the present-day continents were once joined in a single supercontinent called A Pangaea. B Panthalassa. C Laurasia. D Gondwana.

14. < BackNext >PreviewMain 7. Which of the following structures is shown in the diagram if the bottom layer is the oldest? A a monoclineC an anticline B a faultD a syncline Chapter 7 CRCT Preparation Use the diagram to answer question 7.

15. < BackNext >PreviewMain Chapter 7 CRCT Preparation 7. Which of the following structures is shown in the diagram if the bottom layer is the oldest? A a monoclineC an anticline B a faultD a syncline Use the diagram to answer question 7.

16. < BackNext >PreviewMain 8. The sinking of Earth’s crust to lower elevations is called A rebound. B subsidence. C uplift. D deformation. Chapter 7 CRCT Preparation

17. < BackNext >PreviewMain Chapter 7 CRCT Preparation 8. The sinking of Earth’s crust to lower elevations is called A rebound. B subsidence. C uplift. D deformation.

18. < BackNext >PreviewMain Chapter 7 CRCT Preparation 9. Sea-floor spreading occurs at which of the following types of tectonic plate boundaries? A transform B convergent C divergent D strike-slip

19. < BackNext >PreviewMain Chapter 7 CRCT Preparation 9. Sea-floor spreading occurs at which of the following types of tectonic plate boundaries? A transform B convergent C divergent D strike-slip

20. < BackNext >PreviewMain Chapter 7 CRCT Preparation A Oceanic crust is Earth’s thinnest and least dense compositional layer. B Continental crust is Earth’s thinnest and densest compositional layer. C The mantle is Earth’s thickest and densest compositional layer. D The core is Earth’s thickest and densest compositional layer. Use the table to answer question 10. 10. According to the table, which of the following statements is true?

21. < BackNext >PreviewMain Chapter 7 CRCT Preparation A Oceanic crust is Earth’s thinnest and least dense compositional layer. B Continental crust is Earth’s thinnest and densest compositional layer. C The mantle is Earth’s thickest and densest compositional layer. D The core is Earth’s thickest and densest compositional layer. Use the table to answer question 10. 10. According to the table, which of the following statements is true?

22. < BackNext >PreviewMain 11. The Appalachian Mountains and the Himalaya Mountains were both formed by folding. The Himalayas are still growing taller. The Appalachian Mountains are losing height and becoming more rounded. Why are these mountains changing in different ways? Chapter 7 CRCT Preparation

23. < BackNext >PreviewMain Chapter 7 CRCT Preparation 11. Answer - Full-credit answers should include the following points: The Himalayas are still growing because they are at a convergent boundary that is still active. The Appalachian Mountains are no longer at an active convergent boundary, so their rock layers are no longer being pushed upward. The Appalachian Mountains are being worn down by weathering and erosion.

24. < BackNext >PreviewMain Chapter 7 CRCT Preparation 12. The Cartersville fault formed when metamorphic rocks from Georgia’s Piedmont region were pushed over sedimentary rock layers in the Valley and Ridge region to the west. What kind of fault is the Cartersville fault? Explain your answer.

25. < BackNext >PreviewMain Chapter 7 CRCT Preparation 12. Answer - Full-credit answers should include the following points: The Cartersville fault is a reverse fault. The two types of rock were pushed together, causing the metamorphic rock to slide up and over the sedimentary rock.