Tectonic Plates

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Across
  1. 1. When magma and ash bursts from the ground
  2. 3. When two plates move away from each other
  3. 4. Supercontinent that excited millions of years ago
  4. 7. Most destructive eruption in the history of the U.S
  5. 8. The earth's innermost layer (very hot)
  6. 11. When tectonic plates collide, fold upward, and form mountain ranges
  7. 13. A line that traces a geological fault
  8. 14. When one plate moves underneath another plate
  9. 15. Layer of Earth's crust that lies underneath the 7 continents
  10. 18. Fault line that goes through California
  11. 19. Where two plates meet
  12. 20. Melted rock ON the earth's surface
Down
  1. 2. Theory that the continents once existed as one massive continent and then drifted apart
  2. 5. A smaller earthquake following the main shock
  3. 6. When the ground shakes
  4. 9. The earth's middle layer (comes after the crust)
  5. 10. When two plates move towards each other
  6. 12. The earth's outermost shell
  7. 16. Melted rock UNDERNEATH the earth's surface
  8. 17. Large volcanic Crater, formed when the mouth of a volcano collapses after an eruption