Plate Tectonics (Solliday - Phys. Geo.)

Edit Answers
1234567891011121314151617
Across
  1. 1. the movement of heat by flowing substances.
  2. 2. the large super-continent made of all the continents when they were joined together in the past.
  3. 4. core the liquid layer within the core made of iron and nickel.
  4. 6. the solid layer within the core made of iron and nickel.
  5. 7. the action or process in plate tectonics of the edge of one crustal plate descending below the edge of another
  6. 8. the older, thick, felsic, low density crust that the continents rest upon.
  7. 9. A change in the polarity of Earth's magnetic field in which the north magnetic pole becomes the south magnetic pole and vice versa.
  8. 14. any episode of mountain building in Earth’s past.
  9. 16. the younger, thin, mafic, high density crust that lies at the bottom of the oceans.
  10. 17. the layer below the lithosphere that allows the lithospheric plates to move around due to convection currents within it.
Down
  1. 1. a boundary between two plates that are coming together.
  2. 3. the theory that the continents drifted about freely on Earth’s surface.
  3. 5. a theory in geology that the lithosphere of the earth is divided into a small number of plates which float on and travel independently over the asthenosphere and much of the earth's seismic activity and volcanism occurs at the boundaries of these plates.
  4. 10. when the edges of two crustal plates move past each other in opposite directions perpendicular to each other.
  5. 11. the divergence at mid-ocean ridges of the tectonic plates underlying the oceans that is due to upwelling from the earth's interior of magma which solidifies and adds to the spreading plates.
  6. 12. the solid surface of Earth made of the upper mantle and all of the crust.
  7. 13. a boundary between two plates that are moving apart.
  8. 15. the thickest layer within Earth’s interior between the crust and core.