Chapter 5 Plate Tectonics

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Across
  1. 2. A well-tested concept that explains a wide range of observations
  2. 5. A layer of hot, solid rock below the crust and above the core
  3. 6. The process where lava adds new ocean crust to the ocean floor
  4. 8. A section of lithosphere that slowly moves over the asthenosphere, carrying pieces of crust.
  5. 11. A break or crack in Earth’s lithosphere along which the rocks move
  6. 13. A device that determines the distance of an object under water by recording echoes of sound waves
  7. 14. The layer of rock that forms Earth’s outer skin
  8. 15. The theory that pieces of Earth’s lithosphere are in constant motion driven by mantle convection
  9. 17. The solid iron and nickel layer in the middle of the Earth
  10. 20. The process where ocean floor sinks beneath a deep-ocean trench into the mantle
  11. 21. A boundary where two plates move towards each other
  12. 23. A boundary where two plates move away from each other
  13. 24. A deep valley where two plates move apart
  14. 25. The transfer of energy through space
Down
  1. 1. The soft layer of rock in the mantle
  2. 3. Flow which transfers heat within a fluid
  3. 4. The transfer of heat by the movement of fluid currents
  4. 7. A deep valley where ocean crust sinks toward the mantel
  5. 9. Very hard rock which forms the top layer of the mantle and the crust
  6. 10. Core- The only liquid layer in the earth, made of iron and nickel
  7. 12. The theory that all continents were once joined together and have since drifted apart.
  8. 16. The transfer of heat between touching material
  9. 18. A boundary where two plates move past each other in opposite direction
  10. 19. An undersea mountain chain where new ocean floor is made
  11. 22. The name of the single landmass that broke apart 200 million years ago and made today’s continents