Across
- 2. A bunch of atoms in a group.
- 3. Tiny organisms in water.
- 5. Liquid essential to life.
- 8. Rain water or runoff.
- 10. A structure in the water used to hold back water in a river
- 13. A wheel that was used in the old days to generate electricity.
- 14. Tunnels that lead water to crops, or other destinations.
Down
- 1. Tiny insects in water.
- 4. Hard substances in water.
- 6. A period of time without water.
- 7. 1 millionth the size of a meter, used to measure organisms
- 8. Fats oils and grease.
- 9. an area of land that separates two bodies of water.
- 11. Catches storm water.
- 12. Thick liquid material in water