Pick-a-project Plate tectonics

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Across
  1. 3. A mudflow caused by volcanic eruptions
  2. 7. ____ Lava is sharp and blocky
  3. 8. ______ Lava is smoother and more ropey
  4. 11. _____ magma is thick and traps gas bubbles
  5. 12. Molten rock beneath the surface
  6. 14. Example of a super volcano (national park)
  7. 15. A bowl-shaped depression at the vent
  8. 17. Magma is called this when it reaches the surface
  9. 18. A volcano that forms in the middle of a plate
  10. 19. Pebble sized material (tephra)
  11. 21. Scientist first credited with the theory of continental drift
  12. 22. A long narrow split where basaltic magma flows out
Down
  1. 1. San Andreas Fault is an example of this type of plate boundary
  2. 2. The supercontinent that existed about 300 million years ago
  3. 4. Mid-ocean ridge is an example of this type of plate boundary
  4. 5. Solid material ejected from a volcano
  5. 6. _____ magma causes gentle volcanic eruptions
  6. 9. most dangerous part of an explosive eruption
  7. 10. Large rock blown from the crater of a volcano
  8. 13. An opening where ejecta come out
  9. 16. Finest material(tephra)
  10. 20. Himalayas are an example of this type of plate boundary