Terms : Hide Images
| 7097674191 | desertification | The creation of desert-like conditions |  | 0 |
| 7097674193 | environmental degradation | Damage or destruction of the natural environment |  | 1 |
| 7097674930 | deforestation | A large number of trees being cut down |  | 2 |
| 7097674931 | loess | Fertile soil that's yellow in color |  | 3 |
| 7097674932 | division of labor | Breaking down a job into separate smaller parts |  | 4 |
| 7097675272 | barter | A system by which one thing is exchanged for another |  | 5 |
| 7097675273 | polytheistic | Worshiping many gods |  | 6 |
| 7097675274 | ziggurats | Large stepped pyramids with temples and alters |  | 7 |
| 7097675654 | theocrats | Rulers holding both religious and political power |  | 8 |
| 7097675655 | Golden Age | A period in a society of relative peace, prosperity, and innovation |  | 9 |
| 7097675656 | ancestor veneration | A Chinese belief that ancestors could speak to the gods for them |  | 10 |
| 7097676027 | cuneiform | The world's first writing system, which consisted of marks carved onto wet tablets. |  | 11 |
| 7097676028 | Indo-European | A large language family. |  | 12 |
| 7097676029 | papyrus | A type of plant that grew along the Nile River |  | 13 |
| 7097676269 | alphabetic script | A system of symbols that represent the sounds of speech |  | 14 |
| 7097676270 | Sanskrit | Aryan sacred language |  | 15 |
| 7097676271 | feudalism | The network of regional rulers, with relationships based on mutual defense agreements, created the basics of this |  | 16 |
| 7097676862 | Mandate of Heaven | Idea that a just ruler's power was given to them by the gods |  | 17 |
| 7097676863 | empire | Large controlled territories that include diverse culture groups |  | 18 |
| 7097676869 | city-states | A city that is independent, that has its own government |  | 19 |
