Changing Earth's Surface

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Across
  1. 3. the solid outer layer of the earths crust and upper mantle
  2. 4. Boundary A plate boundary where two plates move past each other in opposite directions
  3. 6. tectonic theory the theory that the lithosphere is broken up into large plates that move and then rejoin; considered the unifying theory of geology
  4. 7. A supercontinent containing all of Earth's land that existed about 225 million years ago.
  5. 9. The layer of hot, solid material between Earth's crust and core.
  6. 10. Boundary A plate boundary where two plates move toward each other.
  7. 11. The central part of the earth below the mantle
  8. 12. Boundary A plate boundary where two plates move away from each other.
Down
  1. 1. The preserved remains or traces of an organism that lived in the past
  2. 2. Ocean Ridges long chains of mountains on the ocean floors
  3. 4. Plates Large movable plates under the Earth's surface.
  4. 5. Floor Spreading the process by which new oceanic lithosphere forms as magma rises toward the surface and solidifies
  5. 8. System all of the matter, energy, and processes within Earth's boundary
  6. 10. The thin and solid outermost layer of the Earth above the mantle