Choice board assignment :3

2. a natural, flowing stream of fresh water, usually large, that moves in a defined channel towards a larger body like a lake
5. an early city that was like a small, independent country with its own laws and government
9. arranged in a difficult way
11. one of the two largest rivers in Southwest Asia that flow from the mountains in Turkey to the Persian Gulf
12. to keep something in good condition by making necessary repairs
13. to move from one geographic region to another
15. fine particles of rock
16. a substance that lies between or above other things
17. a resource that can be used to make something else
19. one of the two largest rivers in Southwest Asia that flow from the mountains in Turkey to the Persian Gulf

1. a strong disagreement
3. belonging to the very distant past and no longer in existence
4. in ancient times, the geographic area located between the Tigris and Euphrates rivers
6. an area in southern Mesopotamia where cities first appeared
7. to build; usually some kind of structure, such as a house
8. an ancient Mesopotamian civilization that emerged in the region between the Tigris and Euphrates rivers around 4500 BCE
9. to give, along with others, to a common cause
10. a group of people who live in the same area and are united by common interests
14. a means of supplying land with water
18. a wall of earth built to prevent a river from flooding its banks