Crossword Homework

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Across
  1. 2. the species of humans from 300,000 years ago to now (you are one)
  2. 4. the study of human's past using written records and documents
  3. 5. a length of time with a common feature
  4. 7. history before written records
  5. 8. 100 years
Down
  1. 1. the study of natural history using fossils
  2. 3. the study of civilizations using artifacts
  3. 6. man-made objects