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