Across
- 2. the nonliving part of the environment
- 4. organisms that have to obtain their food
- 6. using the land so it is productive for the long-term
- 8. movement of people into a location
- 10. the number of individuals of a species
- 14. process that returns nitrogen to the atmosphere
- 16. the number of individuals the environment can support
- 18. occurs when two organisms fight over resources
- 20. the partition of the Earth life can exist
- 23. the level with interactions of communities and the abiotic factors
- 25. close relationship between two species
- 28. feeding of one organism on another
- 29. the simple feeding relationship in an ecosystem
- 31. organisms that eats plants
- 33. organisms that eat decaying organisms
- 34. the role an organism plays in the environment
- 35. the change in plant life as the ecosystem changes
- 36. the complex feeding relationships with may organisms in an ecosystem
- 37. steps in a food chain that show how energy is transferred
- 38. the process that uses chemical in the environment to make food
Down
- 1. build up of harmful chemicals in the food chain
- 3. the level with interactions of populations of different species
- 5. growth shaped like a J
- 7. process that turns nitrogen gas into usable nitrogen
- 9. both organisms benefit from the relationship
- 11. matter that is essential for organisms to survive
- 12. nutrient that restricts population growth
- 13. species that are introduced into a new habitat
- 15. movement of people out of a location
- 17. growth shaped like an S
- 19. organisms that make their own food
- 21. the process that uses light energy to make food
- 22. one organism benefits and the other is harmed in the relationship
- 24. making the environment uninhabitable for wildlife
- 26. the living part of the environment
- 27. the number of individuals in a space
- 30. organisms that eat meat
- 32. the interaction between organisms and their environment