Tectonics-Earth Science

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Across
  1. 3. pieces of continent and ocean that move due to convection
  2. 4. form along subduction zones on the less dense plate
  3. 9. evidence used to support the idea of a metallic core
  4. 10. less dense plate material, very old
  5. 14. theory that explains continental drift, how the plates move, and other modern evidence
  6. 16. the thickest layer of Earth where convection currents flow
  7. 18. convergent boundary between Asia and India
  8. 20. the point at the surface directly above the earthquake found using either damage or seismic waves
  9. 22. convergence where both plates are equal density
  10. 23. seismic wave traveling in a compression (push-pull) motion
  11. 26. the magnitude of an Earthquake can be assigned this number based on quantitative wave measurements
  12. 27. divergent boundary between Africa and SaudiArabia
  13. 28. matching __ of the same type and age are found on different continents today
  14. 32. transform boundary along California coast
  15. 33. circulating flow of dense, molten material driving plates
  16. 35. the point where elastic rebound occurs for an earthquake
  17. 36. slowest seismic waves causing the most damage
  18. 38. identical __ are found on distant continents now separates by oceans
Down
  1. 1. convergence where denser plate subducts beneath less dense plate
  2. 2. when two or more plates collide head-on
  3. 5. many continents appear to fit together due to their matching
  4. 6. an area of activity located away from tectonic plate boundaries
  5. 7. denser plate material that subducts, much younger
  6. 8. the name given to the ancient supercontinent
  7. 11. theory explaining the cause of earthquakes
  8. 12. the interval between the arrival of primary and secondary waves
  9. 13. when two plates move along side one another but get stuck
  10. 15. deep chasms forming along convergent boundaries
  11. 17. they outline Earth's tectonic plates
  12. 19. form along an ocean-ocean convergent boundary in North Pacific Ocean
  13. 21. densest layer of Earth composed of metallic material
  14. 24. forming along divergent boundaries (ex: atlantic ocean)
  15. 25. they change speed as they move through denser or less dense layers of Earth
  16. 29. forms where Nazca plate subducts under South American plate
  17. 30. theory that all landmasses were once connected but have been moving away since
  18. 31. the strength of an earthquake asigned a number using damage and other qualitative observations
  19. 33. the thinnest layer of Earth that moves due to convection currents
  20. 34. seismic wave traveling sideways as it also moves forwards
  21. 37. when two plates pull away from one another