Across
- 3. The unit of sound that is measured
- 6. Can't see things far away
- 7. Microscopic organisms that cause disease
- 10. White blood cell that kills pathogens
- 11. Actions to improve or maintain cleanliness
- 12. Diseases that can spread
- 13. Use a less amount amount of something
Down
- 1. Chemicals provided to prevent diseases
- 2. Diseases that can't be spread
- 4. Disease that can't be cured with medications
- 5. Use something again
- 8. Can't see things close by
- 9. Recovering and changing objects to preserve the environment
- 12. Places full of decomposing matter