Land On Earth

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Across
  1. 3. one of the different shapes of Earth's surface
  2. 4. a deep valley with very high, steep sides
  3. 6. land that rises above the surrounding land with steep sides
  4. 7. an area of land surrounded by water
Down
  1. 1. a large lowland area that is flat
  2. 2. a large area of land on Earth
  3. 5. the low land between mountains