Across
- 2. the materials available in an environment
- 5. a long period of time
- 6. An object that is crafted and/or used by humans to make life easier
- 9. over generations
- 12. The biggest continent
- 15. a source that was created after the time period by someone who did not witness the event
- 17. someone who studies the past through artifacts
- 18. the ocean closes to India
- 19. The study of places and the relationships between people and their enviorments
- 20. An important moment when big change occurs
Down
- 1. An object that is made or changed by a human, and is of historical interest
- 3. someone's principles or standards of behavior
- 4. Group that includes all humans after their split from chimpanzees
- 7. A source originating from the time period being studied
- 8. someone who is an expert of or studies history
- 10. The continent that we live on
- 11. A scientific theory that explains how a species
- 13. the continent where human life began
- 14. the ocean closes to us right now
- 16. When animals walk using only two feet