Chapter 7.1 Guided Reading (5th)

1234567891011121314151617181920
Across
  1. 3. Single-celled organisms; some are helpful and some cause disease
  2. 6. A tool scientists use to see very small organisms
  3. 7. A living thing so tiny it can only be seen with a microscope
  4. 8. Scientist who showed that germs are in the air and on hands
  5. 12. Organisms like mold and yeast that can sometimes cause infections
  6. 13. The idea that diseases are caused by microorganisms
  7. 16. An important hygiene habit that helps stop the spread of germs
  8. 17. A living cell that a virus invades and uses to make more viruses
  9. 19. The body’s first barrier that keeps many germs out
  10. 20. Parasites that can live inside the body and cause illness
Down
  1. 1. A germ that causes disease
  2. 2. A shot or spray with weakened germs that helps prevent disease
  3. 4. Cells that attack and destroy invading pathogens
  4. 5. The body’s ability to fight off disease
  5. 9. Special proteins made by the body to fight germs
  6. 10. Mostly single-celled organisms that often live in water and can cause disease
  7. 11. A medicine used to kill bacteria
  8. 14. Clean habits that help prevent sickness
  9. 15. Scientist who showed that specific germs cause specific diseases
  10. 18. A tiny particle that must enter a living cell to reproduce