Part III - 5 points: Read each clue carefully, write the correct word where it belongs.

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Across
  1. 4. shapes on the planet's surface.
  2. 5. stretches of mostly flat land.
  3. 6. areas of low land located between mountains or hills.
Down
  1. 1. land that rises higher than 2,000 feet.
  2. 2. land surrounded by water on three sides.
  3. 3. areas of land completely surrounded by water.