Unit 17 Crossword Puzzle

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Across
  1. 1. Vigorous activity; power.
  2. 3. To treat something like paper in a special way so that it can be used again.
  3. 5. A group of animals or plants that have certain characteristics in common that can interbreed.
  4. 8. Having to do with or like a nucleus or nuclei.
  5. 11. Having to do with or coming from the sun.
  6. 13. A getting rid of something, as by throwing away.
  7. 14. The act or condition of outlasting or surviving.
Down
  1. 2. Coming from nature; not artificial
  2. 3. A supply of something that can be used or drawn on.
  3. 4. All the surroundings and conditions that have an effect on the development of a person, animal, or plant.
  4. 6. The science of developing and managing forests.
  5. 7. Animals and plants that live in the natural environment.
  6. 9. The act of protecting or preserving from loss, injury, decay, or waste.
  7. 10. The study of the relationship between living things and their environment.
  8. 12. To make or become pure.