| A | B |
|---|
| agriculture | the ways of growing crops and raising animals |
| surplus | an extra amount of food, money, or other goods beyond what is needed for personal use |
| specialize | train to do one particular kind of work |
| barter | to trade goods and services in payment, rather than to pay with cash or coins |
| domesticate | to adapt and raise wild plants and animals for agricultural needs |
| irrigation | a system of transporting water from a river, lake, or well to make farming possible in dry region |
| city-state | a city and its nearby land and villages |
| polytheism | belief in many gods |
| empire | several territories and nations ruled by one authority |
| scribe | a person whose job was to write or copy documents, records, and other documents in ancient times |
| code | a collection of laws |
| covenant | an agreement or promise |
| monotheism | belief in one God |
| astronomy | the study of the stars and planets |
