| A | B |
|---|
| arid | dry |
| climate | typical weather in a region |
| environment | natural world |
| irrigate | to water crops |
| nomads | people who move from place to place |
| region | area of land |
| tribe | group of Native Americans |
| dwelling | where people live |
| game | animals that people hunt for food |
| customs | special ways that a group of people does things |
| theory | idea that tries to explain something |
| herds | large groups of animals that eat grass |
| harvest | fruits and vegetables that farmers gather from the fields |
| weaving | making cloth |
| breed | help animals reproduce |
| unique | the only one of its kind |
| architects | people who design buildings |
| generation | all the people who are about the same age |
| natural resources | things from the Earth that people use, such as trees and minerals |
| civilization | developed society |
