classic
city-state:
city-state: an early city that was like a small, independent country with its own laws and government
Sumer
an area in southern Mesopotamia, where cities first appeared
irrigation:
: a means of supplying land with water
Tigris River:
one of the two largest rivers in Southwest Asia that flow from the mountains in Turkey to the Persian Gulf
levee:
: a wall of earth built to prevent a river from flooding its banks
Euphrates River:
one of the two largest rivers in Southwest Asia that flow from themountains in Turkey to the Persian Gulf
silt:
: fine particles of rock
Mesopotamia:
the geographic area located between the Tigris and Euphrates rivers