Across
- 2. to store items.
- 4. a bacterium which occurs mainly in the gut.
- 6. (dangerous)
- 9. to be protected of something.
- 10. a microscopic organism
- 11. free from dirt
- 12. transported by air
- 14. of or at a high temperature.
- 15. cause or to allow liquid to fall over the side of an object.
- 17. a substance which grows on objects after a period of time.
- 18. the degree or intensity in a substance or object.
- 19. to prevent something from happening.
Down
- 1. microscopic organisms which aren't visible to the naked eye.
- 3. the state of being free of illness and death.
- 4. to bring apart.
- 5. able to catch fire.
- 7. conditions or practices to prevent diseases.
- 8. a substance capable of causing illness or death.
- 11. to pollute
- 13. of or at a low temperature.
- 15. to reduce or eliminate pathogenice agents.
- 16. spore-producing organisms feeding on an organic matter.
- 20. (major or important).