The Cryosphere

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Across
  1. 3. a flat, treeless Artic region
  2. 4. a figure with 5 strait sides and angles
  3. 5. the frozen water on Earth
  4. 6. frozen water
  5. 7. when the ground is taken away by wind, water, of other natural forces
Down
  1. 1. slowly moving mas of ice
  2. 2. cracks in the ground that are filled with ice
  3. 4. ice that is always frozen