Plate tectonics

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Across
  1. 2. rocks that are found closest to the ridge
  2. 3. what plate tectonics are made of
  3. 4. A violent collision with earth caused this to orbit with us
  4. 7. a fault where tectonic blocks slide past each other near vertical
  5. 9. the person credited with "seafloor spreading"
  6. 12. mid ocean under water mountains that are caused by the tectonic plates pulling apart
  7. 14. When two plates move away from each other
  8. 16. a low region that forms where plates move apart
  9. 21. a cloud of gas and dust in outer space that is visible in the night sky
  10. 22. result of plate tectonics
  11. 23. made up of old and weathered volcanic rock has highest peaks in appalachian
  12. 24. the lower part of the mantle
  13. 26. person credited with the continental drift theory
  14. 27. when all matter was formed in the universe 13,8BA
  15. 28. the supercontinent caused by the movement of plate tectonics
Down
  1. 1. what makes up the ocean floor
  2. 3. When two plates move towards each other
  3. 5. cycle rifting convergence subduction and collision
  4. 6. the stress force place on rocks result of plate tectonics
  5. 8. the upper part of the mantle
  6. 10. core solid made up of iron and nickel
  7. 11. deformation caused by joint cracks in the rock
  8. 13. a steep depression in the bottom of the ocean floor that mark the deepest parts
  9. 15. the specific point of Earth's surface directly below the earth quake
  10. 17. one of the driving forces of plate tectonics
  11. 18. core liquid made up of iron and nickel
  12. 19. when one plate tectonic sink beneath the mantle at convergent boundaries
  13. 20. ranges caused by continental-continental convergent boundaries when they colide
  14. 25. the luminous explosion of a dying star