7th Grade Science Review #4 (Rock Layers)

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Across
  1. 4. a semi-solid layer of the mantle that allows tectonic plates to move
  2. 5. the breaking down of rocks into smaller pieces
  3. 6. Core the solid, dense center of Earth
  4. 7. of Fire a zone of frequent earthquakes and volcanoes around the Pacific Ocean
  5. 9. a deep valley formed where an oceanic plate is subducted
  6. 13. preserved remains or traces of ancient organisms
  7. 15. Rock rock formed from cooled magma or lava
  8. 18. Crust the thicker, less dense crust that forms the continents
  9. 21. Boundary a plate boundary where two plates move toward each other
  10. 22. Earth's outermost solid layer
  11. 23. the thick layer of rock between Earth's crust and core
  12. 25. Boundary a plate boundary where two plates move apart
  13. 26. Crust the thin, dense crust under the ocean floor
  14. 27. the point on Earth's surface directly above an earthquake’s focus
  15. 28. magma that reaches the Earth's surface
  16. 29. the rising of Earth's surface due to tectonic activity
  17. 30. Tectonics movement of Earth's lithospheric plates that shapes the planet's surface
  18. 32. the amount of mass in a given volume; affects plate movement
  19. 33. Valley a deep valley formed at a divergent boundary on land
  20. 34. the shape and features of Earth's surface
  21. 36. the laying down of sediment carried by wind, water, or ice
  22. 37. Ridge an underwater mountain range formed by divergent plates
  23. 38. Rock rock that has changed form due to heat and pressure
  24. 41. a large crater formed after a volcano collapses
  25. 42. Plate a large, rigid piece of Earth's lithosphere that moves over the asthenosphere
  26. 44. (Earthquake) the location underground where an earthquake starts
  27. 46. an opening in Earth's crust where magma, ash, and gases erupt
Down
  1. 1. a large ocean wave caused by underwater earthquakes or eruptions
  2. 2. the study of Earth's landforms and the processes that shape them
  3. 3. Time the timeline used to describe Earth’s history
  4. 8. Waves vibrations that travel through Earth during an earthquake
  5. 10. Spreading the formation of new oceanic crust at mid-ocean ridges
  6. 11. Earth's innermost layer, made mostly of iron and nickel
  7. 12. Current the flow of material in the mantle caused by heat transfer
  8. 14. Spot a fixed area in the mantle where magma rises to form volcanoes
  9. 16. a process where one plate sinks beneath another at a convergent boundary
  10. 17. a break in Earth's crust where rocks move past each other
  11. 18. Drift the theory that continents were once joined and have since moved apart
  12. 19. Cycle the continuous process of rock formation and change
  13. 20. Rock rock formed from layers of sediment
  14. 23. molten rock beneath Earth's surface
  15. 24. a supercontinent that existed millions of years ago
  16. 28. the rigid outer layer of Earth, including the crust and upper mantle
  17. 31. the movement of sediment by wind, water, ice, or gravity
  18. 35. a sudden shaking of the ground caused by movement along faults
  19. 39. Arc a chain of volcanic islands formed at a subduction zone
  20. 40. Core the liquid layer surrounding the inner core
  21. 43. Boundary a plate boundary where two plates slide past each other
  22. 45. a landform created by the collision or uplift of tectonic plates