Vocab. Crossword Deidra Bonner

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Across
  1. 1. The Earth's innermost layer.
  2. 2. A mountain that may form around an opening in the Earth's surface where an eruption of molten rock occurs.
  3. 3. Spreading A process In which magma is slowly pushed up through crack in a rift and then cools to form new sea floor.
  4. 10. The layer directly beneath the Earth's innermost layer.
  5. 11. Wave An energy wave from an earthquake that travels only at the surface and moves less quickly than P waves and S waves but makes the ground roll and sway.
  6. 12. Includes all of the crust and part of the upper mantle.
  7. 13. Tectonics The theory scientists use to explain movements of plates on Earth.
  8. 15. Ridge Place where plates of Earth's crust along the ocean floor pushes up to form new ocean floor and a mountain range.
  9. 17. Cone Volcano Built from ashes, cinders, and rocks. Erupts for a short period of time.
  10. 18. Wave A slower kind of energy wave released by an earthquake that causes vibrations at right angles to the wave's direction of travel.
  11. 21. Scale A scale that measures the amount of energy released during and earthquake.
Down
  1. 1. Volcano Switches between quiet eruptions of flowing lava and eruptions of gas-rich lava. Has most powerful eruptions of all.
  2. 4. The sudden movement of rock along a fault which releases energy vibrations.
  3. 5. The point in the Earth's crust where the first major movement of an earthquake fault occurs.
  4. 6. Boundary A boundary where crustal plates move away from each other.
  5. 7. Partially melted rock in the upper mantle of Earth.
  6. 8. Boundary A boundary where crustal plates collide.
  7. 9. Fault Boundary A boundary where crustal plates grind past each other.
  8. 13. Wave A primary wave or "push-pull" wave of released energy in the Earth's surface that causes a back-and-forth vibration in the same direction that the wave moves.
  9. 14. The point on the Earth's surface directly above the focus of an earthquake.
  10. 16. The Earth's outmost layer.
  11. 19. A deep ocean valley formed where two crustal plates move apart.
  12. 20. Volcano Looks like a shield. Are the worlds largest volcanoes.