Across
- 4. : Slow eating away of metals due to air and moisture.
- 6. : Insoluble solid formed during a chemical reaction.
- 9. : Band of seven colours obtained when white light passes through a prism.
- 11. : Thread-like structure that carries hereditary information.
- 12. : Chemical messenger secreted by endocrine glands.
- 14. : Light-sensitive layer of the eye on which the image is formed.
- 15. : Substance that changes the rate of a chemical reaction without being consumed.
Down
- 1. : Process by which green plants prepare food using sunlight.
- 2. : Tiny air sacs in the lungs where exchange of gases takes place.
- 3. : Defect of vision in which distant objects cannot be seen clearly.
- 5. : Process involving addition of oxygen or removal of hydrogen.
- 7. : Metal or graphite rod used in electrolysis.
- 8. : Structural and functional unit of the kidney.
- 10. : Bending of light when it passes from one transparent medium to another.
- 13. : Transparent glass object used to disperse white light.