Across
- 4. The body system that helps protect us from infections and diseases
- 5. Method of killing germs using chemicals or heat
- 8. Weakened or inactive form of a germ that helps build immunity
- 9. The process of preventing the spread of germs is called
- 11. Tiny living things that can only be seen with a microscope
Down
- 1. Method to remove germs by using soap and water for at least 20 seconds
- 2. Special proteins produced by the immune system to fight off infections
- 3. Not all microorganisms are harmful to humans. (True/False)
- 6. Sneezing into your hands is an effective way to prevent the spread of germs. (True/False)
- 7. Microorganisms that cause disease are called
- 10. Clear, sticky substance that traps germs and other particles