Earth Science Review - Part I

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Across
  1. 5. layer in which convection currents flow
  2. 8. layer of soil with clay and little humus
  3. 10. management of soil to prevent its loss
  4. 12. center of earth
  5. 14. process in which wind moves surface materials
  6. 18. measure of how well soil supports growth
  7. 20. transfer of energy through empty space
  8. 21. this type of stress pushes rock in opposite directions
  9. 22. layer of solid hot rock divided into layers inside the earth
  10. 25. ash, cinders, bombs build up in a steep pile; type of volcano
  11. 27. large area of flat land high above sea level
  12. 28. result of sea floor spreading apart along both sides
  13. 29. most common type of volcano
  14. 30. convection currents cause plates to move; theory
  15. 33. point under earth's surface where rock breaks under stress
  16. 34. solid layer of rock that is basic part of soil
Down
  1. 1. edges of plates meet at these lines
  2. 2. this water feature forms on deep mountain slopes
  3. 3. dark colored substance in soil; increases fertility
  4. 4. active channel of water that erodes land around it
  5. 6. another name for soil layer
  6. 7. transfer of heat energy by movement of heated fluid, as in earth's mantle
  7. 9. made mostly of the metals iron and nickel
  8. 10. transfer of heat energy by direct contact
  9. 11. travel away from the focus of the earthquake
  10. 13. type of boundar where mid-ocean ridge occurs
  11. 15. layer of solid rock that forms earth's skin
  12. 16. type of weathering where rock is physically broken down
  13. 17. break in the earth's crust
  14. 19. huge hole left by collapse of volcanic mountain
  15. 23. long tube in ground that connects magma chamber to earth's surface
  16. 24. living organism which breaks down remains
  17. 26. this type of earth stress makes reverse faults
  18. 28. this results from movements in inner core of earth
  19. 31. layer of humus, clay, and minerals
  20. 32. minimum number of seismograph stations required to determine location of earthquake