Plate Tectonics

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Across
  1. 1. the layer of rock that forms Earth's surface
  2. 2. 300 million years
  3. 9. below the lithosphere
  4. 11. a certain force of pressing
  5. 12. a rock that is a light color with coarse grains
  6. 14. an boundary in which plates move apart
  7. 15. a force in which destroys
  8. 18. a wake in which earthquakes occur
  9. 19. an boundary in which plates slide past each other
Down
  1. 1. an boundary in which plates come together
  2. 3. forms Earth's outer layer
  3. 4. the crust and uppermost mantle into a single layer called what
  4. 5. a force in which shapes the land
  5. 6. the parts of Earth that contains living organisms
  6. 7. tectonics a theory of plate motions
  7. 8. a rock that is dark and is fine-grained
  8. 10. a system that uses sound pulses to detect the deep sea water
  9. 13. they are formed around transform boundaries
  10. 16. a process where the ocean floor sinks in deep-ocean trenches
  11. 17. an ancient organism that has been preserved in rock