(a) State two objectives of the Economics Community of West African States (ECOWAS).
(b) Identify four problems hindering the achievement of the objectives of ECOWAS.
(c) In what four ways can the problems identified in (b) above be solved?

(a) Highlight three differences between plutonic and volcanic rocks
(b) With the aid of diagrams, describe the mode of formation of crater lake

(a) State three characteristics of limestone region
(b) Describe the formation of limestone pillar.
(c) In what two ways is limestone important to man?

(ai) Highlight two ways in which water resources are classified
(ii) in what three ways can water resources be used?

(b) Describe three ways by which man's activities limit the use of water as a resources

(a) Define the term climate.

(b) Name the instrument used in measuring each of the following climate elements;
(i) temperature
(ii) pressure
(iii) rainfall
(iv) sunshine
(v) humidity

(c) In what four ways is the study of weather and climate important to man?