Chapter 20 Vocabulary

5. the destruction of land in arid and semi-arid climates
6. an area in which the properties of the land undergo a radical change
10. to improve or increase
12. an event or fact that accompanies or determines another
13. an often triangular-shaped section of land formed as the waters of a river slotheyn and split into many channels as rthey deposit sand and silt that has been carried down river
14. to gain
15. the practice of passing down stories from generation to generation by word of mouth
16. pertaining to traditional religious beliefs in which nature and objects, such as athoughtnd mountains, are throught to have spirits
18. a family that is headed by a male family member

1. farming that provides the basic needs of a family with little surplus
2. a geographical region; the amount of space that the surface of a place covers
3. steppe region extending from Senegal to Somalia that receives little rainfall
4. to adapt plant and animals from the wild for human use
7. a large group of people descended from the same ancestor
8. the disposal of waste products
9. possible of likely
11. a family unit made up of a husband, wife, and children
17. pressure or strain