the world's largest desert (3,500,000 square miles) in northern Africa
The world's longest river, which flows northward through East Africa into the Mediterranean Sea
a river flowing from western Africa into the Gulf of Guinea
a river in southern Africa, flowing east through Zimbabwe and Mozambique into the Indian Ocean.
an area of grassland with scattered trees and bushes
system by which goods and services are produced and distributed to meet people's needs
Great Rift Valley
giant fault line or crack in the Earth' s crust which runs from the Red Sea to the Zambezi River
a strip of dry grasslands on the southern border of the Sahara; also known as "the shore of the desert"
a disease caused by mosquitoes implanting parasites in the blood
a potentially fatal disease caused by parasites carried by tsetse fly
to add variety