Earths systems

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Across
  1. 4. a group of the same species living in the same area
  2. 5. pressure and temperature result at depth
  3. 6. large pieces of lithosphere that interact along their boundary
  4. 10. extinction for a time
  5. 14. the semifluid layer of the mantle where currents occur
  6. 15. an opening in the crust where molten rock is expelled
  7. 16. Hot material floats and cold material sinks and immobilizes the tectonic plates.
  8. 17. instruments for measuring seismic waves
  9. 18. ancient supercontinents
  10. 20. plates move between them and create mountains
  11. 21. created by erosion when two sediments compact
Down
  1. 1. crust and upper mantle that include tectonic plates of the earth
  2. 2. The plates separate and form oceanic crust
  3. 3. events that lead to extinction
  4. 7. areas of weakness of crust
  5. 8. the rock created when lava cools
  6. 9. plates slide and create earthquake
  7. 11. plates move away and form and form new crust and cracks
  8. 12. They form when plates collide
  9. 13. located between the hand and the outer core
  10. 19. elongated ocean depressions with subduction