| A | B |
|---|
| plateau | a large, raised area of mostly level land. Example: the Ethiopian Plateau |
| elevation | the height of land above sea level measured in feet or meters |
| escarpment | a steep cliff about 100 stories high or about 1000ft. |
| rift | a deep trench in the Earth's surface. Example:the Great Rift of Africa |
| cataract | rock filled rapids which prevents travel by ships or large boats out to the sea |
| silt | tiny bits of rock and dirt that build up on the bottoms of rivers and lakes |
| fertile | a type of soil that is able to grow a lot of plants |
| tributary | a small river or steam that flows into a larger river |
| irrigate | to artificially water crops |
| oasis | a place where little rains occurs but there are underground water sources make it possible to support life |
| savanna | a region of tall grasses |
| nomad | a member of a people who move from place to place in order to make a living by herding animals, trading, hunting, or gathering foods |
| economy | all the things people do to make a living in a particular place |
| diversify | to add variety. When a country adds variety to its economy it makes it stronger. |
| Sahel | a very hot and dry region in the west and central Africa where the southern edge of the Sahara meets the savanna. |
| Namib Desert | a desert in the western part of Namibia |
| Kalahari Desert | a desert that extends over much of Botswana and prt of Namibia |
| Sahara Desert | the world's largest desert located in northern Africa |
| fertile soil, trees, minerals, water | important natural resources found in Africa |
