(a) Define Ecosystem
(b) Describe four ways in which man has interfered with the ecosystem
(c) Outline three consequences of man's interference with the ecosystem.
Country X has five states, ABCD and E with population statistics and land area as stated in the table below
| state | Total population(million) | Total land Area (km\(_2\) |
| A B C D E Total |
5.4 4.2 6.5 3.2 7.4 ? |
120,000 85,000 135,000 98,000 140,000 |
Table I Population/Land area statistics for the five states in Country X. Use the table above to:
(a) Calculate the (i) total population (ii) total land area (iii) population density
(b) Explain four factors responsible for the distribution of world population.
(c) Highlight three factors that cause increase in world population
(a) With specific examples; explain the terms:
(i) light industry (ii) heavy industry
(b) Highlight four factors that limit industrial development in tropical Africa.
(a) Give any three reasons each for the
(i) high volume of trade between Nigeria and the U.S.A.
(ii) low volume of trade between Nigeria and Ghana
(b) Suggest any four ways of improving trade between Nigeria and other West African countries.
(a) On an outline map of Nigeria, locate and name one area noted for each of the following:
(i) tin mining; (ii) limestone mining; (iii) thermal power station; (iv) oil refinery; (v) hydro-electric power station.
(b) Describe the method of mining tin in Nigeria
(c) State four ways in which minerals are of economic importance to Nigeria.
