KATHERINE'S WORD WALL PROJECT

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Across
  1. 3. Occurs when a fish population is being depleted fast than it can reproduce itself
  2. 5. Salt water ecosystems and organisms
  3. 6. Organisms that float in the water and drift with the currents
  4. 8. Water held beneath the Earth's surface
  5. 9. The process of dragging huge, heavy nets over the sea floor, scooping up everything in its path
  6. 10. The release of oil into the environment caused by natural causes or human activity
  7. 12. A man-made, underwater structure
  8. 16. The introduction of harmful substances or products into the environment, usually as a result of human activities
  9. 17. Water that is above the Earth's surface
  10. 18. An area of land where all of the water drains into the same body of water
  11. 20. The water flow that occurs when waer from rain, snowmelt, or other sources flows over the land
  12. 21. Property of being acidic, Substances with pH values between 0-7
Down
  1. 1. Polkution that cannot be traced to a specific source
  2. 2. Measurement of how acidic or basic a substance is
  3. 4. An underground treatment system for household sewage
  4. 7. An underground rock formation where water collects
  5. 11. A stream that flows to a larger stream or other body of water
  6. 13. Precipitaion containing acids that form in the atmosphere when industrial gas emissions and other pollutants combine with water
  7. 14. tThe area of land that allows water to replenish an aquifer
  8. 15. Property of being a base, substances with pH values between 7-14
  9. 16. Anything capable of causing disease
  10. 19. The removal of sediment from the bottom of sea or river