What is History?

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Across
  1. 3. General attitude about life and events.
  2. 5. The study of how history is written.
  3. 11. Study of human culture and development.
  4. 13. The study of people and events of the past.
  5. 14. Preserved remains of plants and animals.
  6. 16. A time period marked by notable events.
  7. 17. A decision based on evidence.
  8. 18. The historical era from A.D. 1400 to present.
  9. 20. Source from someone who experienced the event.
  10. 21. A period of 10 years.
  11. 22. Abbreviation for 'Anno Domini'.
  12. 25. Conclusion based on evidence and reasoning.
  13. 26. System used to organize days.
  14. 28. A period of 100 years.
  15. 29. A span of 1,000 years.
  16. 30. Time period from A.D. 500 to A.D. 1400.
  17. 31. A long and distinct period in history.
Down
  1. 1. Abbreviation for 'Common Era'.
  2. 2. People who study and interpret the past.
  3. 4. Man-made object from the past.
  4. 6. Calendar developed by Julius Caesar.
  5. 7. Abbreviation for 'Before Christ'.
  6. 8. Proof that something is true.
  7. 9. Where information comes from.
  8. 10. Time before writing was developed.
  9. 11. Historical period beginning with writing.
  10. 12. Calendar created by Pope Gregory XIII.
  11. 15. Source based on other sources.
  12. 19. Study of prehistoric life through fossils.
  13. 23. A personal judgment affecting objectivity.
  14. 24. Abbreviation for 'Before Common Era'.
  15. 27. Study of past using objects left behind.