Water systems

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Across
  1. 4. an area of land where all water present eventually drains into one main body of water
  2. 7. an area where the climate is different from its surroundings
Down
  1. 1. the underground fresh water reservoir
  2. 2. the upper surface of ground water is called the _____ _____
  3. 3. the concentrations of salts in water
  4. 5. a mass of ice overlaying snow
  5. 6. the ability of a material to absorb heat