Plate tectonics , internal structure of earth and earthquake

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