Across
- 2. interactions between organisms of two different species
- 6. consists of all the food chains in a single ecosystem.
- 8. the number of individuals per unit area or volume
- 12. introduction into the environment of a substance
- 13. an organism that helps hold the system together of any ecosystem
- 14. a resource that can be replenished naturally over time
- 16. cycle one of several natural cycles
- 19. measure of gauging human dependence on natural resources
- 20. close living relationship between organisms from different species
- 22. environment of an animal, plant, or other organism
- 23. environmental condition that limit the growth
- 25. organism that can produce their own food using energy from the environment
Down
- 1. a group of organisms that have a similar feeding mode
- 3. non-living factors that impact an ecosystem
- 4. The weight or total quantity of living organisms of one animal or
- 5. a graph showing the number
- 7. the study of the environment
- 9. a relationship between two organisms in which one organism benefits, and one is unaffected.
- 10. long-term ,predictable atmospheric conditions of a specific area
- 11. an organism that cannot produce its own food
- 15. the height is always the same.
- 17. the movement of organism into a new habitat
- 18. The action of coming to live permanently in a foreign country
- 21. resilient species that are the first to colonize barren environments
- 24. a group of people living in the same place