Science Chapter 4 - Plate Tectonic

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Across
  1. 4. continents were all once joined ; Greek word for "All World."
  2. 6. hypothesis that states that the continents once formed a single landmass and drifted their present locations.
  3. 8. machine that measures the times at which seismic waves arrive at different distances from an earthquake.
  4. 10. thin and solid outermost layer of the Earth above the mantle
  5. 11. central part of the Earth below the Mantle.
Down
  1. 1. block of lithosphere that consists of the crust and the rigid, outermost part of the mantle.
  2. 2. that occurs when forces act to stretch n object
  3. 3. a plastic layer of the mantle on which pieces of the lithosphere move.
  4. 5. boundary in which tectonic plates separate
  5. 7. upward-arching fold in the Horizontal Stress Process
  6. 9. set of deep cracks that forms between two tectonic plates that are pulling away from each other.