SOCIAL SCIENCES

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Across
  1. 4. Series of hills or mountains
  2. 6. Passes between hills, or cols between mountain peaks
  3. 7. low AREA OF LAND BETWEEN HILLS OR MOUNTAIN
  4. 8. A string of islands; or a mountain range
  5. 9. a mansion and its surrounding land
  6. 14. Region of the earth lying below the crust and above the central core
  7. 15. Strip of land connecting larger land masses with water on either side
  8. 16. Small sheltered bay
  9. 17. an ISOLATED HILL WITH STEEP SIDE
Down
  1. 1. Low land between hills
  2. 2. Stretches of low marshy ground
  3. 3. an AREA OF VERY LOW RAIN FALL
  4. 5. Low area of land
  5. 6. Stone fragments viewed initially in large ground
  6. 10. Large land mass
  7. 11. Hills or ridges of drifted sand as in a desert
  8. 12. Edge of a crater or volcano
  9. 13. Flat area of land
  10. 18. A rocky peak of a hill or mountain