Across
- 2. to collect something to a harmful degree
- 3. water collecting on top of the ground
- 5. relying on someone or something else
- 10. water flowing down a slope to a waterway
- 12. causes harm to the environment
- 13. living organisms
- 14. human created underwater structure
Down
- 1. sudden situation where change and destruction occurs
- 4. area separating waters flowing to different places
- 6. activity, something that people do or cause to happen
- 7. non-living organisms
- 8. water held underground
- 9. a group of people or animals living in an area
- 11. environment of biotic & abiotic factors
- 15. a body of porous rock or sediment saturated with groundwater