| A | B |
|---|
| Mesopotamia | ”In ancient times |
| Tigris River | ”One of the two largest rivers in Southwest Asia that flow from the mountains in Turkey to the Persian Gulf” |
| Euphrates River | ”One of the two largest rivers in Southwest Asia that flow from mountains in Turkey to the Persian Gulf.” |
| Materials | ”A resource that can be used to make something else” |
| Maintain | ”To keep something in good condition by making necessary repairs” |
| Sumer | ”An area in southern Mesopotamia |
| Irrigation | ”A means of supplying land with water” |
| Levee | ”A wall of earth built to prevent a river from flooding its banks” |
| Layer | ”A substance that lies between or above other things” |
| Silt | ”Fine particles of rock” |
| Disputes | ”a strong disagreement” |
| City-State | ”An early city that was like a small |
