history

3. The development of skills in a particular kind of work, such as trading or record keeping.
5. A form of trade in which people exchange goods and services without the use of money.
6. A prehistoric period that began about 8000 B.C.
7. A prehistoric period that lasted from about 2,500,000 to 8000 B.C.
8. A long-lasting pattern of organization in a community.
12. A member of a biological group including human beings and related species that walk upright.
14. A member of a nomadic group whose food supply depends on hunting animals and collecting plant foods.
16. The taming of animals for human use.
18. A skilled worker, such as a weaver or a potter, who makes goods by hand.
20. A human-made object, such as a tool, weapon, or piece of jewelry.

1. One of the professional record keepers in early civilizations.
2. A tiered.
4. The major change in human life caused by the beginnings of farming.
9. The way I which people apply knowledge, tools and inventions to meet their needs.
10. The biological species to which modern human begins belong.
11. A form of culture characterized by cities, specialized workers, complex institutions, record keeping, and advanced technology.
13. A system of writing with wedge-shaped symbols, invented by the Sumerians around 3000 B.C.
15. A period in human history
17. A people's unique way of life, shown by its tools, customs, arts, and ideas.
19. A member of a group that has no permanent home, wandering from place to place in search of food and water.