Physical Geography of Africa

5. the world's longest river, flowing over 4,000 miles through the Sudan Basin into Uganda, Sudan, and Egypt
6. an underground layer of rock that stores water
10. the largest desert in the world, stretching over 3,000 miles across the African continent
12. the expansion of dry conditions to most areas that are near a desert
14. a place where water from an aquifer has reached the surface; it supports vegetation and wildlife
15. a long, thin valley created by the moving apart of the continental plates

1. a steep slope with a nearly flat plateau on top
2. a volcano in Tanzania in Africa, also Africa's highest peak
3. a depression or low area on the earth
4. an area of East Africa, containing some of the best grasslands in the world and many grazing animals
7. delta of the Niger River and an area of Nigeria with rich oil deposits
8. a dam on the Nile River in Egypt, completed in 1970, that increased Egypt's farmable land by 50%
9. an area encompassing the tops of trees in a rain forest, about 150 feet above the ground
11. loose sedimentary material containing very small rock particles, formed by river deposits and very fertile
13. a narrow band of dry grassland running east to west on the southern edge of the Sahara, that is used for farming and herding