Earth’s Interior and Processes

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Across
  1. 2. a layer of molten iron and nickel that surrounds the inner core of the earth. __________ core
  2. 8. the process by which oceanic crust sinks beneath a deep ocean trench and back into the mantle at convergent plate boundary
  3. 9. a dense sphere of solid iron and nickel in the center of the earth. __________ core
  4. 11. theory that all the continents were once joined together in a single landmass and have since drifted apart. __________ __________ theory
  5. 13. a block of rock that forms the upper half of a fault. __________ wall
  6. 14. a plate boundary where two plates move past each other. __________ plate boundary
  7. 15. the theory that pieces of earth’s lithosphere are in constant motion, driven by convection currents in the mantle. __________ __________ theory
  8. 17. a type of fault where rocks on either side move past each other side-ways with little up or down movement. __________-__________ fault
  9. 18. a plate boundary where two plates move toward each other. __________ plate boundary
  10. 20. the name of a single landmass that broke apart 225 million years ago and gave rise to today’s continents
  11. 21. a type of fault where the hanging wall slides upward; caused by compression in the crust. __________ fault
Down
  1. 1. stress that squeezes rock until it folds or breaks
  2. 3. a break or crack in earth’s lithosphere along which the rocks move
  3. 4. a plate boundary where two plates move away from each other. __________ plate boundary
  4. 5. current in earth’s mantle cause by density changes due to heating of matter. __________ currents
  5. 6. a block of rock that forms the lower half of a fault
  6. 7. stress that stretches the rock so that it becomes thinner in the middle
  7. 8. the process by which molten material adds new oceanic crust to the ocean floor
  8. 10. the layer of rock that forms earth’s outer surface
  9. 12. the layer of hot, solid material between earth’s crust and core
  10. 16. a rigid layer made up of the upper part of the mantle and the crust
  11. 19. a type of fault where the hanging wall slides downward; caused by compression in the crust. __________ fault