PREHISTORY

3. Important invention of the year 3000 B.C
6. Place where cavemen used to live
7. Revolutionary invention of 3200 B.C
9. CCivilization located between the Tigris and Euphrates Rivers
12. Continent in which hominids first appear
13. Prehistoric animal, similar to nowadays elephant
15. Hominid that used to live in Europe
16. Age in which people started using copper, tin, bronze, and iron to make tools

1. The activity of chasing or searching for wild animals or birds to kill or catch them
2. First humans in history
4. Period during which thick ice sheets cover vast areas of land
5. Period from 10 thousand to 3 thousand B.C
8. Group of people that don't live in an established place
10. Period until 10 thousand B.C
11. Is the Practice of growing crops or raising animals
14. Prehistoric period in which stone was used to make tools