Across
- 1. forms where Nazca plate subducts under South American plate
- 3. form where one oceanic plate meets a continental plate
- 5. circulating flow of dense, molten material driving plates
- 6. forming along divergent boundaries (ex: atlantic ocean)
- 10. patterns of these outline Earth's tectonic plates
- 12. densest liquid layer of Earth composed of metallic material
- 13. pieces of continent and ocean that move due to convection
- 16. the thickest layer of Earth where convection currents flow
- 17. convergent boundary between Asia and India
- 18. form along an ocean-ocean convergent boundary in North Pacific Ocean
- 20. the when you use 3 seismic stations to find an epicenter
- 22. the ___ of an S-wave is used to help calculate Richer magnitude
- 26. the thinnest layer of Earth that moves due to convection currents
- 31. the point at the surface directly above the earthquake found using either damage or seismic waves
- 33. form along subduction zones on the less dense plate
- 34. the magnitude of an Earthquake can be assigned this number based on quantitative wave measurements
- 37. theory explaining the cause of earthquakes
- 39. they change speed as they move through denser or less dense layers of Earth
- 41. the point where elastic rebound occurs for an earthquake
- 42. the name given to the ancient supercontinent
- 43. the interval between the arrival of primary and secondary waves
- 44. evidence used to support the idea of a metallic core
- 45. when two plates move along side one another but get stuck
- 46. many continents appear to fit together due to their matching
- 47. transform boundary along California coast
Down
- 2. divergent boundary between Africa and SaudiArabia
- 4. convergence where both plates are equal density
- 5. when two or more plates collide head-on
- 7. theory explaining how ocean plates behave at divergent boundaries
- 8. convergence where denser plate subducts beneath less dense plate
- 9. matching __ of the same type and age are found on different continents today
- 11. deep chasms forming along convergent boundaries
- 14. seismic wave traveling in a compression (push-pull) motion
- 15. form where 2 continental plates converge
- 19. Earth's liquid outer core either bends or blocks seismic waves to create these
- 21. densest solid layer of Earth composed of metallic material
- 23. the property that causes one plate to subduct while another does not
- 24. when two plates pull away from one another
- 25. less dense plate material, very old
- 27. alternating north/south magnetism evidence that supports sea floor spreading
- 28. identical __ are found on distant continents now separates by oceans
- 29. theory that explains continental drift, how the plates move, and other modern evidence
- 30. the strength of an earthquake assigned a number using damage and other qualitative observations
- 32. theory that all landmasses were once connected but have been moving away since
- 35. an area of activity located away from tectonic plate boundaries
- 36. seismic wave traveling sideways as it also moves forwards
- 38. slowest seismic waves causing the most damage
- 40. denser plate material that subducts, much younger