Across
- 1. in general, any movement of individuals or populations from one location to another; specifically, a periodic group movement that is characteristic of a given population or species
- 3. an organism's change in response to a change in the organism's environment
- 8. the liberation of nitrogen from nitrogen-containing compounds by bacteria in the soil
- 12. the water that is beneath the Earth's surface
- 14. the unique position occupied by a species, both in terms of its physical use of its habitat and its function within an ecological community
- 16. the part of Earth where life exists; includes all of the living organisms on Earth
Down
- 2. the formation of ammonia compounds in the soil by the action of bacteria on decaying matter
- 4. a community of organisms and their abiotic environment
- 5. the process by which plants release water vapor into the air through stomata; also the release of water vapor into the air by other organisms
- 6. a group of various species that live in the same habitat and interact with each other
- 7. the movement of carbon from the nonliving environment into living things and back
- 9. the process by which nitrites and nitrates are produced by bacteria in the soil
- 10. the continuous movement of water between the atmosphere, the land, and the oceans
- 11. the place where an organism usually lives
- 13. a diagram that shows the feeding relationships among organisms in an ecosystem
- 15. the study of the interactions of living organisms with one another and with their environment