a) Draw a sketch map of Nigeria. On the map. show and name one area with:
(i) Mangrove swamp vegetation: (ii) Rain forest vegetation: (iii) Guinea savanna vegetation: (iv) Sudan savanna vegetation. 
(b) Name three types of trees found in the forest zone of Nigeria. 
(c) Explain four contributions of forest vegetation to the economic development of Nigeria.

(a) Explain the following terms:

1.rotation of the earth;

2.revolution of the earth;

3.equinox.

(b) Outline three effects of the revolution of the earth

(a)        List any three types of mountains.

(b)        In what four ways are mountains important to man?

(c)        Outline two problems caused by mountains.

(a)  Define climate.

(b)  Describe the three climatic belts recognized by the Greek system of climatic classification.

(c)  Outline three reasons why Koppen’s system of climatic classification is the most widely accepted.

(a)What are environmental hazards?

(b)List three examples of environmental hazards.

(c)Explain five ways of preventing desert encroachment.