Across
- 3. the training of plant and animals to make them more useful to humans
- 4. old stone age
- 8. new stone age
- 11. an object used to help a person accomplish a task
- 12. to go to a place
Down
- 1. to do one thing well
- 2. human existence in cities
- 5. farming
- 6. the time before there was writing
- 7. an extra supply of something
- 9. long period of time
- 10. people who moved place to place to meet there basic needs