Land of the Lost

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Across
  1. 5. a flat representation of part of Earth
  2. 7. lowland between mountain ranges, hills, or other higher land
  3. 8. an imaginary line that marks 0 degrees longitude
  4. 12. part of a map that explains what its symbols stand for
  5. 15. the measure of distance east or west of the prime meridian
  6. 16. how much elevation is covered by the map
  7. 19. difference in elevation from one contour line to the next
  8. 20. the measure of distance north or south of the equator
  9. 21. indicated by concentric circles
Down
  1. 1. type of map that shows the shape of the land using contour lines
  2. 2. a side view of part of a landscape
  3. 3. 0 degrees latitude
  4. 4. a fixed ratio between the size of a real object and the size of a model of the same object
  5. 6. short dashed lines drawn perpendicular to an enclosed contour line to indicate a depressions
  6. 9. height above sea level
  7. 10. a small object that represents a larger object, usually built to scale
  8. 11. change in elevation over distance
  9. 13. the actual elevation of a location indicated on a topographic map
  10. 14. altitude at sea level
  11. 17. photographs taken from an aircraft in order to collect data for charts and maps
  12. 18. a 3-dimensional model of Earth