Let's learn Earth & Space

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Across
  1. 2. Type of plate boundary that are sliding past each other.
  2. 6. Deepest part of earth.
  3. 7. This process happens when the oceanic crust sinks beneath the continental crust.
  4. 9. Boundary between the crust and mantle, as inferred from the change in the speed of body waves
  5. 11. Wave of energy that travels through the earth as a result of an earthquake.
  6. 12. Top layer of earth.
  7. 13. Other possible cause of plate movements which the weight of the subducting plate pulls the trailing slab into the subduction zone just like a tablecloth slipping off the table and pulling items with it.
  8. 16. Formed when two oceanic crusts collide.
  9. 17. Geologic feature that happens when two continental plates move apart from each other.
  10. 19. A geologic feature that may form when plates are moving away from each other.
  11. 21. Type of plate boundary that collides with each other.
  12. 22. Seismic wave that travels across the surface of the earth as opposed through it.
  13. 23. One of the possible cause of plate movements which the ridge pushes the old sea-floor towards the trench and it will subduct.
  14. 27. An upwelling of superheated rock from the mantle.
  15. 30. The one who made the continental drift theory.
  16. 31. Theory that states that the earth's crust is divided into several plates.
  17. 34. Proposed to be the supercontinent 250 million years ago.
  18. 35. Time difference between the p-waves and s-waves.
  19. 37. The point on the surface directly above the focus.
  20. 38. Is the instrument used to mapped the mid-ocean ridges.
  21. 39. Type of plate boundary that plates are moving away from each other.
Down
  1. 1. Seismic wave that travels through the earth rather than across its surface.
  2. 3. Process which happens when ocean plates move apart and magma rises from the mantle and create new areas of oceanic crust.
  3. 4. Geologist who proposed the theory of sea-floor spreading.
  4. 5. The point within the earth where the actual movement takes
  5. 6. Theory that states that there was a big continent before.
  6. 8. Method that is used to locate the epicenter of an earthquake.
  7. 10. Geologic feature that happens when two continental plates collide.
  8. 14. The very slow creeping motion of earth's solid silicate mantle caused by convection currents carrying heat from the interior of the planet's surface.
  9. 15. Hot molten material that rises from the mantle to the crust.
  10. 18. It is formed when a continental plate and an ocean plate collides.
  11. 20. Upper mantle.
  12. 24. A recording device that is used to locate the earthquake's epicenter.
  13. 25. Thickest layer of the earth where magma comes from.
  14. 26. Surface seismic wave generated by the interaction of p-waves and s-waves at the surface of the earth that move with a rolling motion.
  15. 28. Outer crust.
  16. 29. A very large wave that is caused by earthquake.
  17. 32. Surface seismic wave that cause horizontal shifting of the earth during an earthquake.
  18. 33. This may happen during divergence or convergence of plates because of the movement of plates.
  19. 36. A concentration of heat in the mantle capable of creating magma