Ch. 11 Vocab

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Across
  1. 6. area of Earth's surface where water percolates down into an aquifer
  2. 7. flowing network of water formed by streams and rivers
  3. 11. level where rocks and soil are saturated with water
  4. 12. percentage of the total volume of rock that has spaces
  5. 13. area of land drained by a river
  6. 15. safe to drink
  7. 17. process of removing salt from water
Down
  1. 1. systems of pipes and tunnels that brought water from the mountains
  2. 2. water found beneath Earth's surface in the spaces in sediment and rock
  3. 3. underground formation containing groundwater
  4. 4. ability of rock or soil to allow water to flow through
  5. 5. fresh water on Earth's land surface
  6. 6. artificial lake formed behind the dam
  7. 8. when lakes and slow moving streams contain an abundance of nutrients
  8. 9. method of providing plants with water sources other than direct precipitation
  9. 10. hole that is dug or drilled to reach groundwater
  10. 14. organisms causes disease or illness
  11. 16. built across rivers to control the river's flow