There is little water in the flat land of northern Nigeria.
The two main ethnic groups of Northern Nigeria are the Hausa and the Fulani, who have existed here for 1,000 years.
The roofs of the homes tend to be flat, for it gets very hot in Northern Nigeria.
Most people make a living by herding or farming.
One-fifth of all Nigerians live in the two cities in western Nigeria.
The Yoruba are the largest ethnic group of western Nigeria.
Poor citizens live in shantytowns, which are shacks clustered together on the outskirts of cities.
People who live in big cities work industrial jobs, while people from the rural areas work on family farms.
Eastern Nigeria is full of resources that northern and western Nigeria do not have, like rivers.