Empire

2. a "social ladder" is a form of social _________
3. the supply of water to land or crops to help growth
4. the ideas, customs, and social behaviour of a particular people or society
6. the stage of human social and cultural development and organization that is considered most advanced
9. "between two rivers"
10. two words, a city that with its surrounding territory forms an independent state
13. the type of writing first invented by the Sumerians

1. the arrangement or classification of something into different groups
2. a nation or territory considered as an organized political community under one government
5. a pictorial symbol for a word or phrase
7. a member of a people that travels from place to place to find fresh pasture for its animals and has no permanent home.
8. a term used to describe a group of territories ruled by one single ruler or state
11. the science or practice of farming, including cultivation of the soil for the growing of crops and the rearing of animals to provide food, wool, and other products.
12. a temple designed as a step pyramid