earth science terminolgy

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Across
  1. 2. solid dense center of our planet that extends from the bottom of the outer core to the center.
  2. 6. the layer of the earth between the crust and the core.
  3. 7. zone the process by which collision of the earth's crustal plates results in one plate's being drawn down or overridden by another, localized along the juncture of two plates.
  4. 10. (of a rock formation) be broken by a fault or faults.
  5. 14. part of the earths lithosphere that surfaces in the ocean basins, it is primarily composed of mafic rock, sima, rich in iron and magnesium.
  6. 17. a fault in which rock strata are displaced mainly in a horizontal direction, parallel to the line of the fault.
  7. 20. magma that flows onto the earths surface.
  8. 21. the two sub-layers of the earth's crust that move, float, and sometimes fracture and whose interaction causes continental drift, earthquakes, volcanoes, mountains, and oceanic trenches.
  9. 24. made of iron,stretches from the mantle to the core.
  10. 25. a broad, domed volcano with gently sloping sides, characteristic of the eruption of fluid, basaltic lava.
  11. 29. cone volcano a steep conical hill of tephra that accumulates around and downwind from a volcanic vent.
  12. 30. the outer layer of the Earth.
Down
  1. 1. under the asthenosphere, is the strong layer layer part of the mantle from the asthenosphere to the core.
  2. 3. an inclined fault in which the hanging wall appears to have slipped downward relative to the footwall.
  3. 4. funnel shaped pit around the central vent at a volcano.
  4. 5. a large volcanic crater, typically one formed by a major eruption leading to the collapse of the mouth of the volcano.
  5. 8. a stress which stretches rocks into two opposite directions.
  6. 9. the hot liquid that forms when rock partially or completely melts may include mineral crystals.
  7. 11. a geological fault in which the upper side appears to have been pushed upward by compression.
  8. 12. To form bends in (a stratum of rock).
  9. 13. a conical volcano built up by many layers of hardened lava, tephra, pumice, and volcanic ash.
  10. 15. spreading a process in which new ocean floor is created as molten material from the earth's mantle rises in margins between plates or ridges and spreads out.
  11. 16. crack,split, or break in the earths core.
  12. 18. outermost rigid layer of the earth
  13. 19. soft layer of the mantle on which pieces of the lithosphere move.
  14. 22. plates earth major plates, known as plate tectonics also known as continental drift.
  15. 23. current stream of fluid propelled by thermal convection.
  16. 26. a mountain or hill, typically conical, having a crater or vent through which lava, rock fragments, hot vapor, and gas are being or have been erupted from the earth's crust.
  17. 27. boundary a major geologic discontinuity or suture marking the juncture of lithospheric plates that have been joined by plate tectonics.
  18. 28. core is divided into the outer and inner core, the outer core is liquid and surrounds the inner core.