Plate tectonics , internal structure of earth and earthquake

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Across
  1. 5. the wave of energy caused by the sudden breaking of rock within the earth or by an explosion
  2. 6. where plates slide passed each other
  3. 9. the majority of the mantle from the core-mantle boundary is solid
  4. 12. a line of volcanoes above the melting oceanic plate
  5. 13. outermost layer of earth
  6. 14. overlies a plastic layer
  7. 16. where two separate plates are pushing into each other
  8. 19. it is mountain range of western south american
  9. 20. point of origin of earthquake
Down
  1. 1. earth has rigid outer layer
  2. 2. below the crust lies the dense and extending to a depth of 2900 km
  3. 3. where two plates are moving apart
  4. 4. shaking of ground
  5. 7. they are always slowly moving, but they get stuck at their edges due to friction
  6. 8. first major discontinuity occurs at a depth of 30-40km below the continents
  7. 10. continent-continent convergent boundary example in mountain range
  8. 11. found along divergent plate boundaries
  9. 12. it lies at the center of the earth it is denser than the mantle
  10. 15. they rolls along the ground just like a wave rolls across a lake or an ocean
  11. 17. it is occurs within earth's interior at a depth of about 2900km (1800mi) below the surface
  12. 18. plates move relative to each other