Across
- 2. a liquid, matter that flows
- 4. fresh water mixed with salt
- 5. taking care of something
- 7. chemistry of earths crust
- 8. caused by humans
- 11. elements mixed in the same phase
- 12. force of an object
- 13. atoms chemically combined
- 15. amount packed in
Down
- 1. all water in the world
- 3. increase overtime of population
- 6. amount of salt
- 9. toxins in air
- 10. total mass of living materials in one specific area
- 14. waste or water that flows everywhere