Across
- 2. a series of actions or steps taken in order to achieve a particular end
- 3. to gather information to create a book or a report
- 7. replacing someone or something.
- 8. extend something like a disease
- 10. a person who introduces new methods or ideas
- 11. somethings that occurs in all the world
- 12. an infectious microbe
- 13. a sudden, dramatic, and important discovery or development
Down
- 1. refuse to do something or accept it
- 3. a complex human society
- 4. made by human beings rather than occurring naturally
- 5. to stay alive.
- 6. a period of a hundred years
- 8. a medical procedure cured by cutting open the body
- 9. identify the nature of an illness by examination of the symptoms