Noor's crossword

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Across
  1. 3. the middle part of the earth
  2. 6. an area where one tectonic plate is forced downward
  3. 7. a volcano that has not erupted for at least 10,000 years, but scientists think it may erupt again
  4. 10. a large natural elevation of the earth's surface
  5. 11. a theory that the contents were attached together in the past, and have been falling apart ever since
  6. 13. the upper layer of the earth's mantle, below the lithosphere, in which there is relatively low resistance to plastic flow and convection in thought to occur
  7. 14. a boundaries between tectonic plates that are moving towards each other
  8. 15. part of the earth between the core and the the crust
  9. 16. no longer in existence
  10. 18. outer layer of the Earth
  11. 19. a sudden shaking of the ground
Down
  1. 1. a scientist who uses fossil evidence to study life in prehistoric times
  2. 2. a boundary between tectonic plates that are moving away from each other
  3. 4. the plates sliding sideways past each other
  4. 5. volcano built up of ash or lava
  5. 8. outer part of the earth
  6. 9. periods of thousands, millions, and billions, of years referred other scientists who study the earths history
  7. 12. a single landmass
  8. 13. a volcano that is erupting
  9. 17. the size of a diagram or model in proportion to the actual size of a object