What is history?

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Across
  1. 3. a letter or newspaper from the best
  2. 4. electric tools
  3. 5. a moment frozen in time
  4. 8. beliefs and traditions shared by a group of people
  5. 10. spoken history
  6. 11. someone who studies history
  7. 13. second hand objects
  8. 14. a person professionally involved in politics
  9. 15. events from the past
  10. 18. objects that were used in the past
  11. 19. physical features on land
Down
  1. 1. a person or group that holds political power
  2. 2. a story of a persons life written by that person
  3. 6. the study of people using resources
  4. 7. events from a different point of view
  5. 9. a story about someones life
  6. 12. first and objects
  7. 16. one sided point of view
  8. 17. clues to the past
  9. 20. paintings or sculptures