Across
- 2. Spherical mirror curved inwards.
- 3. Ratio of image height to object height.
- 4. Rusting or eating up of metal surfaces.
- 6. Spoilage of food containing fats and oils.
- 8. Bending of light when entering another medium.
- 12. The SI unit of power of lens.
- 13. Salivary enzyme that breaks down starch into sugar.
- 14. Food pipe muscle movement pushing food down.
Down
- 1. Substance showing if a solution is acidic or basic.
- 4. Another name for a convex lens.
- 5. Process of losing oxygen or gaining electrons.
- 7. Red blood pigment that carries oxygen.
- 9. Basic filtering unit of the kidney.
- 10. Natural dye from lichens used to test acids.
- 11. Tiny air sacs in lungs for gas exchange.