Patrick´s Crossword puzzle. Use _ for spaces.

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Across
  1. 3. way in which people are spread across a given area.
  2. 5. a living organism that shapes its environment.
  3. 8. a nonliving part of an ecosystem that shapes its environment.
  4. 9. population´s size increases at a faster rate over time.
  5. 12. a group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding.
  6. 13. limiting factor that does not depend on the population size.
  7. 14. movement of organisms to an area than one they are native to, permanently.
  8. 16. a supply of materials that an organism uses to survive or to improve its environment.
  9. 20. a chart that shows the different number of age of the organisms in an area.
  10. 21. the natural home or environment of an animal, plant, or other organism.
  11. 23. the branch of biology that deals with the relations of organisms to one another and to their physical surroundings.
  12. 24. a group of organisms living in the same place or having a particular characteristic in common.
Down
  1. 1. seasonal movement of organisms between two areas.
  2. 2. when the population size flattens out just before it hits the carrying capacity due to limiting factors.
  3. 3. a particular section, group, or type of animals living in an area or region.
  4. 4. measurement of population per unit area.
  5. 6. the maximum reproductive capacity of an organism under optimum environmental conditions.
  6. 7. a factor that limits the size of a population in an area.
  7. 9. movement of organisms leaving an area they are native to, permanently.
  8. 10. the number of organism in a population.
  9. 11. limiting factor that depends on the population size.
  10. 15. the amount of organisms and area can hold without disrupting the organisms.
  11. 17. a biological community of interacting organisms and their physical environment.
  12. 18. a chart that shows the different number of genders in an area.
  13. 19. a graph showing the number or proportion of individuals surviving to each age for a given species or group.
  14. 22. the regions of the surface, atmosphere, and hydrosphere of the earth occupied by living organisms.