Across
- 3. region of burning gas
- 6. SI unit of pressure
- 9. decay of metals by the action of air and water
- 11. disease causing organism
- 13. gas is essential to survive on earth
- 15. generic designation for a family of synthetic polymers
- 17. up and down or to and fro movement
- 20. the process of spreading grains
Down
- 1. transparent jelly-like substance
- 2. force applied to a unit area surface
- 4. science dealing with the study of microorganisms
- 5. the process of sepreating grains
- 7. chemical substance that is ability to kill growth of microorganisms
- 8. making a surface thick
- 10. metal made by combining two or more metals
- 12. the study of microscope
- 14. force of attraction between all the masses in universe
- 16. is used to freezing food
- 18. push or pull acting on a object
- 19. the highness and lowness of a sound