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| 1. | study of human population size, |
| 2. | resources that are limited and take along periods of time to recover (2 Words) |
| 3. | excessive use of species that have economic value |
| 4. | increasing concentration of toxic substances in organisms as trophic levels increase in a food chain or web (2 Words) |
| 6. | a species limit of population size in a particular habitat (2 Words) |
| 7. | population growth in which equal birth and death rates create a stable human population (3 Words) |
| 9. | a form of water pollution |
| 10. | how fast a given population grows (3 Words) |
| 11. | separation of a ecosystem into small pieces of land (2 Words) |
| 14. | nonnative species that has one way or another been integrated into the native environment by human or other means (2 Words) |
| 15. | large percent of all living things becoming extinct in a short period of time (2 Words) |
| 16. | variety of life in a area determined by the different species in a area |
| 17. | individuals moving away from a population |
| 18. | different environmental conditions that occur along the boundaries of the ecosystem (2 Words) |
| 19. | variety of genes or inhabitable characteristics that are present in a population (2 Words) |
| 20. | pattern of spacing of a population within a area |
