Across
- 2. Wiped out.
- 5. A substance that protects a person from a disease; from the Latin vacca, for cow.
- 9. The most common form of one-celled organisms.
- 10. A disease that cannot be passed on by the person who is sick to other people.
- 11. To imitate how something happens in a real-world situation by acting it out using a model.
- 12. A person who begins the spread of disease in a group.
- 13. The study of how and why diseases occur.
- 15. The thing that stays the same in an experiment. They keep the experiment fair.
Down
- 1. What you're trying to measure in an experiment.
- 3. A type of medicine that kills microbes or prevents them from growing.
- 4. Body system that fights disease.
- 6. A disease that spreads very readily from person to person.
- 7. The thing you change in an experiment.
- 8. The process or act of imitation or acting out.
- 14. The study of microorganisms.