Across
- 1. Kidney's working unit.
- 4. Product of acid-base reaction.
- 6. Water-conducting tissue.
- 7. Acid meets base.
- 8. Splits white light.
- 10. Rusting-type process.
- 13. Plant food-making process.
- 14. Reason for the blue sky.
Down
- 2. Food-pushing movement.
- 3. Food-conducting tissue.
- 5. Eye's focusing ability.
- 9. Bending of light.
- 11. Forms images by refraction.
- 12. Turns red litmus blue.
- 15. Turns blue litmus red.