Earth's Relief

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Across
  1. 2. a narrow stretch of land surrounded on three sides by water
  2. 5. undersea extension of a continent
  3. 7. a piece of land completely surrounded by water
  4. 8. a high, steep elevation of the earth's surface, higher than a hill
  5. 9. area of sea surrounded by land on three sides
  6. 10. underwater mountain range
Down
  1. 1. flat area of ocean floor
  2. 3. long depression on ocean floor
  3. 4. large, open area of flat land
  4. 6. long depression in the land