Environmental Cross Word!!

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Across
  1. 3. fresh water fish, most common in lake erie.
  2. 5. natural solid mass or aggregate of minerals or minerloid matter.
  3. 8. introduction of harmful materials into the environment.
  4. 9. small single celled organisms. Almost found everywhere on Earth, and are vital to a planets ecosystems.
  5. 11. small, narrow valley which usually has running water.
Down
  1. 1. very steep rock face or cliff.
  2. 2. wood: efficient wood to burn with, unique grain pattern
  3. 4. Species of freshwater fish belonging to the genera oncorhynchus, salmo, and salvelinus.
  4. 5. arch of colors in sky caused by refraction of light
  5. 6. nonflowering, aquatic plant of a large group, seaweeds.
  6. 7. body of water, usually freshwater.
  7. 9. small vessel propelled on water by engines or sails.
  8. 10. perennial plant with an elongated stem