Will's Wonderous Earth Puzzle

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Across
  1. 3. A layer of the earth that is above the mantle
  2. 4. The thickest, outermost layer of the earth
  3. 6. This occurs when the Earth's magnetic field undergoes a significant change in polarity, resulting in the magnetic north and south poles switching places
  4. 8. Describes a solid that can flow slowly under pressure
  5. 9. Thin, dense crust beneath the oceans, made mostly of basalt
  6. 11. The most abundant type of intrusive rock in the continental crust
  7. 13. Rounded, pillow-shaped lava formations created when lava erupts underwater
  8. 15. Heat from the core and from the mantle itself drives this
  9. 18. An underwater mountain chain where new oceanic crust forms at divergent boundaries
  10. 19. A deep valley formed at a divergent boundary where plates pull apart
  11. 24. The process where new oceanic crust forms at mid-ocean ridges and moves outward
  12. 27. The strong, lower part of the mantle beneath the asthenosphere
  13. 28. The solid, innermost layer of the earth
  14. 30. Vibrations that travel through Earth during an earthquake
  15. 32. A dark, fine-grained rock.
  16. 34. This type of boundary is formed when two tectonic plates pull away from eachother
  17. 35. The process where one tectonic plate sinks beneath another into the mantle
  18. 36. A belt of volcanoes formed above a subducting oceanic tectonic plate
  19. 39. A deep, narrow depression in the ocean floor formed where one plate subducts beneath another
  20. 40. The study of ancient magnetic patterns preserved in rocks
  21. 41. A region around a magnetic material or a moving electric charge within which the force of magnetism acts
Down
  1. 1. Describes rock that has melted into liquid form
  2. 2. A large, rigid piece of Earth's lithosphere that moves over the asthenosphere
  3. 5. The modern theory explaining how and why Earth's plates move
  4. 6. The thick layer located between the Earth's crust and its core.
  5. 7. A type of boundary where two plates slide past each other horizontally
  6. 10. A technology that uses sound waves to map the ocean floor
  7. 12. A theory proposed by Wegener
  8. 14. A chain of volcanic islands formed above a subducting oceanic plate
  9. 16. Stiff and inflexible
  10. 17. Hot fluid or semi-fluid material below or within the earth's crust from which lava and other igneous rock is formed on cooling
  11. 20. In the 1950s, she collaborated with geologist Bruce Heezen to produce the first scientific map of the Atlantic Ocean floor
  12. 21. A metorologist that proposed the theory of Continental Drift
  13. 22. a grey-black magnetic mineral which consists of an oxide of iron and is an important form of iron ore
  14. 23. A layer of the earth made of solid rocks and minerals
  15. 25. The distinct layers of the Earth defined by their chemical composition
  16. 26. The layers of the Earth categorized based on their mechanical properties
  17. 29. A sudden and violent shaking of the ground cause by movements within the earth's crust
  18. 31. A supercontinent that existed about 250 million years ago before breaking apart
  19. 33. A liquid layer of iron and nickel surrounding the inner core
  20. 37. The rigid outer part of the earth, consisting of the crust and upper mantle
  21. 38. This type of boundary is formed when two tectonic plates are moving towards eachother