Across
- 2. Provides long-term immunity
- 6. single-celled,microscopic,everywhere
- 8. releases hydrogen when in water
- 10. process by which salt is removed
- 12. unit to count atoms & other small things
- 13. water with high mineral content
- 15. made in reaction of acid w/ a base
- 17. process plants create their food
- 18. hydrocarbon with a single bond
- 19. process which gradually warms earth
- 20. dissolved substance -> insoluble solid
Down
- 1. process in which acid & alkali balance
- 3. our main source of energy
- 4. infectious agent,replicates in cell
- 5. opposite of acid
- 7. organism that makes its own food
- 9. homologous series with -OH group
- 11. opposite of hard water
- 14. hydrocarbon with a double bond
- 16. Cycle of nitrogen through biosphere