Science Crossword Puzzle

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Across
  1. 2. another word for H20
  2. 4. A freshwater pond that only appears in the spring
  3. 6. A solid material that settles in water and must be separated when accumulated in treatment plants
  4. 8. Water added in rivers or aquifers that increases the water table
  5. 9. The ability to pass through things such as pores
  6. 10. The scientific research of water and its functions throughout Earth
  7. 12. An ecological community and environment working together as a single unit
  8. 14. A substance that commonly pollutes water
Down
  1. 1. A chemical food element that must be maintained, if not maintained it can cause harm to aquatic life oxygen and produce algae growth
  2. 3. Too much algae in an environment because of excess nitrates
  3. 5. Elements/compounds required for plants and animals to survive, grow, and reproduce
  4. 7. The level measure of how acidic a substance is
  5. 9. Water that is safe, appropriate, and acceptable for human, plant, or animal consumption
  6. 11. A population of organisms of different species living together in a certain environment
  7. 13. Particles at the bottom of liquids; particles carried by water, wind, etc