Across
- 5. Any object that helps humans with work
- 7. The middle of the stone age
- 8. Farming
- 10. Humans
- 11. Early people who hunted and collected
- 13. The freezing point of the world a long time ago
- 15. The new stone age
Down
- 1. The first part of the stone age
- 2. A group of people who share the same culture
- 3. Changing a plant or animal to help a human with some type of work
- 4. Moving to a new place
- 6. Huge stones used as monuments
- 9. A time before writing
- 12. A long ago human ancestor
- 14. Bridge A strip of land connecting two continents