Water.

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Across
  1. 2. A big body of slowly moving ice.
  2. 5. heating up water until it ________
  3. 7. Putting water in the Freezer until it ______
  4. 8. Heating Up water until it bubbles.
Down
  1. 1. Frozen water
  2. 3. A flow of water.
  3. 4. Water that Falls off A cliff
  4. 6. The biggest form of water.
  5. 7. A moving source of water