Chase's Continental Drift Crossword Puzzle

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Across
  1. 4. The liquid layer that surrounds the inner core that is made up of liquid iron and nickel.
  2. 8. A valley that forms when two plates move away from each other.
  3. 9. The middle of the earth, made mostly of iron and nickel.
  4. 10. The theory that the continents are gradually moving across earth's surface.
  5. 12. the layer of earth responsible for plate movement.
  6. 16. The man who discovered continental drift.
  7. 18. The thicker part of the crust that forms landforms.
  8. 19. layer of earth's surface that is composed of the crust and upper mantle.
Down
  1. 1. The boundary between two tectonic plates that are running into each other.
  2. 2. The boundary between two tectonic plates that are moving away from each other.
  3. 3. pieces of earth's crust that move because of convection current.
  4. 5. The densest and hottest layer of earth that is a solid metal ball.
  5. 6. The thin, rocky outer layer of Earth.
  6. 7. When one plate moves under another plate and into the mantle.
  7. 11. The upper layer of the earth's mantle below the lithosphere.
  8. 13. Currents found in the mantle that make tectonic plates move.
  9. 14. A supercontinent that existed about 225 million years ago.
  10. 15. The boundary between two tectonic plates sliding past each other.
  11. 17. The remains of a very old organism preserved in rock.