Across
- 4. when living things depend on other living things to survive
- 6. anything that is harmful to air, land, or water; can kill organisms and destroy their habitats
- 7. when their are none of an organims left alive
Down
- 1. renewal a conservation practice in which species are protected ex. saving plant seeds, growing them indoors, plant back in habitat
- 2. occur when heavy rains cause rivers, creeks and streams to flow over their banks; dams and levess are used to prevent
- 3. when there are only a few of an organism left alive
- 5. fire large sections of wilderness on fire; can be caused naturally or by people