Stone Ages

7. a relative who lived in the past
8. the New Stone Age; when people learned to make fire and tools such as saws and drills
9. the time before there was writing
11. huge stone monuments
12. a strip of land connecting two continents

1. the middle part of the Stone Age; marked by the creation of smaller and more complex tools
2. to move to a new place
3. the first part of the Stone Age; when people first used stone tools
4. the process of changing plants or animals to make them more useful to humans
5. people who hunt animals and gather wild plants, seeds, fruits, and nuts to survive
6. long periods of freezing water
10. an early ancestor of humans