JAMB Geography Past Questions & Answers - Page 90

446.

An intrusion of molten magma formed horizontally along the bedding planes of sedimentary rocks is

A.

sill

B.

laccolith

C.

dykes

D.

batholith

Correct answer is C

No explanation has been provided for this answer.

447.

The flow of a river at the lower course is slow because

A.

thick vegetation cover affects free flow of water

B.

of the increase in human activities

C.

the gradient is greatly reduced

D.

of the increase in the volume of water

Correct answer is C

Answer C is the gradient greatly reduced when water flow down from the upper course it flows with a high velocity downwards. An example is a waterfall.as the water enter the lower course the gradient( the rate of regular ascent or descent) is reduced because the slope of the bed is gentle and also, materials washed down from the upper course are deposited there. the vegetation cover does not determine water movement as rivers are not vegetative. tress can only cover the surrounding areas and not the river itself Human activities and water volume also does not determine the flow of river at the lower course. water either small or mass will always find its way

448.

One of the following is the most correct in regards to desert erosional landforms

A.

Yardang

B.

Barchan

C.

Loess

D.

Self dunes

Correct answer is A

Yardang is a sharp irregular ridge of compact sand lying in the direction of the prevailing wind in exposed desert regions, formed by the wind erosion of adjacent material that is less resistant.
Barchan is a crescent - shaped shafting sand dunes, loess is an unstratified brown barry deposited by wind while self dunes are sand dunes in the form of a long narrow ridge
Yardang as to do with erosional land forms.

449.

Balance of payment in international trade does not favour developing countries because

A.

of their low bargaining power

B.

most of their exports are raw materials

C.

their currencies are very weak

D.

of the low demand of their exports

Correct answer is B

The answer is B Most of their export are raw materials, Developing countries often depend on the developed countries to produce their raw material into finished product hence they tend to pay more when raw materials are processed and imported back. Bargaining power has little or no effect on international trade as most international deals with exchange of product. African countries most cases request for manufactured goods they needed rather than been paid

450.

The export trade of Mali is based mainly on

A.

groundnuts

B.

cotton

C.

cattle

D.

cocoa

Correct answer is B

No explanation has been provided for this answer.