Across
- 5. a liquid necessary for the life of most animals and plants
- 6. an administrative unit of government
- 8. any organism of microscopic size
- 9. a biological community of interacting organisms and their physical environment
- 10. single-celled or noncellular spherical or spiral or rod-shaped organisms
Down
- 1. water directly from the spigot
- 2. A way to clear bacteria out of the water
- 3. The process of removing germs and sand particles from water
- 4. property used to characterize materials in reactions that change their identity
- 7. an impairment of health or a condition of abnormal functioning