Across
- 2. Movement of groups of people from one place to another
- 7. Huge, slow moving sheet of ice
- 8. The domestication of plants and animals
- 9. Scientist who studies man-made objects left behind
- 10. A group of people who work together to meet basic needs
- 11. Events that occurred before the invention of writing
- 13. A person with no settled home
- 16. Events that occurred after the invention of writing
Down
- 1. The remains of a once living thing
- 3. Cold, treeless plain whose subsoil is frozen
- 4. A unique way of life that sets a group apart from others
- 5. An organized group living and working under a set of rules
- 6. Scientist who studies the remains of a once-ling thing
- 12. Long, cold-weathered period of time when huge sheets covered the Earth
- 14. An early human
- 15. A human-made object from long ago