Across
- 4. metal plastic and fossil fuels are examples of this resource
- 6. the amount of carbon emitted and the environmental impact
- 7. the first organisms to grow in a new environment
- 11. balance between the earth's resources human needs and other species needs
- 12. the normal warming effect when gases trap heat in the atmosphere
- 13. both organisms benefit
- 14. population grows quickly at first and then levels off
- 17. two or more organisms fighting for the same limited resources
- 18. oxygen wood sunlight water and wind are examples of this resource
- 19. maximum population an environment could support theoretically
Down
- 1. group of organisms of the same species living in the same place
- 2. measures the number of organisms in a defined space
- 3. succession that recovers an old ecosystem
- 5. population growth without limit
- 8. succession that forms a brand new ecosystem
- 9. one organism benefits while the other is harmed
- 10. all things an organism needs and does in its environment
- 14. parts of the environment that limit the size of populations
- 15. community that is mature and stable mix of plants and animals
- 16. one organism benefits while the other is unaffected