science crossword puzzle

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Across
  1. 2. too many microorganisms in water which can make sick
  2. 5. the erosion of soil into rivers and lakes.
  3. 9. U-shaped body of water that forms when a wide meander from the main stem of a river is cut off.
  4. 14. pollution that comes from many places all at once.
  5. 15. A previous v valley formed by fast flowing water.These fast rivers with steep gradients, as in mountain ranges, produce steep walls and a bottom.
  6. 16. A freshwater stream that feeds into a larger, or parent, river is called the mainstream.A river may have many tributes.
  7. 17. Excessive amounts of waste most that contain harmful toxins that are released into the environment.
Down
  1. 1. A deposit of clay, silt, sand, and gravel left by flowing streams in a river valley or delta, typically producing fertile soil.
  2. 3. too many nutrients in water which cause too much algae to grow.
  3. 4. a single identifiable source of pollution (easy to find).
  4. 6. The sand, gravel, boulders, or other debris transported by rolling or sliding along the bottom of a stream.
  5. 7. valley A valley formed by fast flowing water.These fast rivers with steep gradients, as in mountain ranges, produce steep walls and a bottom.
  6. 8. Rivers flowing over gently sloping ground begin to (curve, turn, or bend like a snake) back and forth across the landscape.
  7. 10. nonliving.
  8. 11. sediment carried by a river which settles slowly-almost never touching the stream bed.Maintained by turbulence in the following water and consists of fine sand ,silt and clay.
  9. 12. cloudy water which blocks sunlight.
  10. 13. living.