[{"term": "Primary Source", "definition": "An original document or object from the time period being studied."}, {"term": "Secondary Source", "definition": "A source that analyzes or interprets primary sources (textbooks, articles)."}, {"term": "Chronology", "definition": "The arrangement of events in the order they occurred."}, {"term": "Perspective", "definition": "A particular point of view or way of looking at events."}, {"term": "Bias", "definition": "A tendency to favor one side, sometimes unfairly; present in many historical sources."}]