Vocabulary Unit 8

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