Across
- 3. acronym for a scoring system of inverts
- 5. sharing electrons
- 7. change of water to gas
- 10. behavior observed in fish exposed to extremes of pH
- 12. is another name for the water cycle
- 14. ammonia and ammonium exist in
Down
- 1. toxic component of ammonia
- 2. fauna without a backbone
- 4. source of ammonia in the environment
- 6. NH4+
- 8. measured on log scale
- 9. disease caused by alkaline pH
- 11. excitation of this bond changes the physical state of the water
- 13. unit of measure of nitrite