PLATE TECTONICS

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Across
  1. 2. the edges of tectonic plates. There are three types of them.
  2. 4. the layer of the earth between the crust and the core
  3. 5. When plates move away from each other, the space between them gets filled with material, which rises to the surface, cools and forms mid-oceanic ridges.
  4. 7. The thin and solid outermost layer of the Earth above the mantle
  5. 8. A molten mixture of rock-forming substances, gases, and water from the mantle
  6. 10. a long narrow hilltop, mountain range, or watershed
Down
  1. 1. portion of Earth's crust that lies beneath ocean waters
  2. 3. Shaking and vibration at the surface of the earth resulting from underground movement along a fault plane of from volcanic activity
  3. 6. an opening in the Earth's crust through which molten lava, ash, and gases are ejected.
  4. 9. the rigid outer part of the earth, consisting of the crust and upper mantle