Ecosystems

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Across
  1. 2. to act or operate normally; to perform
  2. 6. very tiny single-celled organisms
  3. 8. matter needed by plants and animals so they can live
  4. 9. the end of or dying out of a type of plant or animal
  5. 11. ready to be used
  6. 12. the pattern of weather conditions in an area or region
  7. 13. people with expert knowledge of science
  8. 15. things that are needed or depended upon
  9. 16. the number of organisms living in an area
  10. 17. very humid and hot or having to do with the tropics
  11. 19. a living community of organisms and their physical environment
Down
  1. 1. usually single-celled organisms that have both plant and animal characteristics
  2. 3. all things that exist, including our solar system and beyond
  3. 4. more than one fungus; the plural of fungus
  4. 5. all living things, including plants and animals
  5. 7. a plant-like organism without leaves, flowers, or green coloring
  6. 10. actions or influences on each other
  7. 14. finally
  8. 18. an animal that hunts or kills another for food