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State whether the following is true or false.
Every contour line either closes on itself or runs off the edge of the map.

  • A.False only at small scales
  • B.True
  • C.False
  • D.True only at large scales

Answer: B

Correct answer: True

A contour is the locus of all points at one height, so it cannot simply stop: the ground at that height continues somewhere. Either the line returns to close on itself, as it does around a summit or a hollow, or it leaves the sheet and closes beyond the neat line. A contour that appears to end within the map is a drawing error, not a landform.

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