Write explanatory notes on the following: 
(a) formation of clouds;

(b) relief rainfall. 

(a) What is water pollution?

(b) Highlight any three causes of water pollution.

(c) Outline three effects of water pollution.

(d) List any two measures that can be used to control water pollution. 
 

Write explanatory notes on drought under the following:

(a) causes; (b) effects; (c) control. 
 

 (a) Explain the term rural settlement.

(b) Describe any three types of rural settlement.

(c) Outline five differences between rural and urban settlements. 
 

(a) (i) Name any three commodities of world trade.
(ii) Identify three sea routes in the world.

(b) Explain any four conditions that promote trade among countries.

(c) Outline any three reasons for the low volume of trade among African countries.