Geography 2005 Jamb Examination

Igneous rocks originate from the cooling and solidification of molten magma. They typically appear massive, crystalline, and compact in geological diagrams.
The labelled point K displays the physical characteristics associated with such rocks, indicating a solidified intrusive or extrusive formation.

Limestone is a sedimentary rock typically found in areas with stratified layers and evidence of depositional environments. The region labelled M shows bedding planes and the structural appearance consistent with sedimentation, which aligns with the nature of limestone deposits.

Exfoliation domes are large, rounded rock masses formed by the peeling or shedding of curved sheets due to pressure release and thermal expansion. The diagram presents a characteristic dome-shaped outcrop with surface layers flaking off, which is typical of exfoliation processes in massive granitic rocks.

Exfoliation commonly occurs in regions with strong temperature fluctuations, particularly in the dry and wet tropics. The alternating heating and cooling enhances expansion and contraction, weakening surface layers and promoting the peeling process characteristic of exfoliation domes.

Coal deposits discovered at the foot of the Udi Hills attracted colonial economic activities centred on extraction. This development stimulated the establishment of Enugu as the main coal-mining settlement.
The city later evolved into a major administrative and commercial centre due to its strategic resource-based origin.

The tundra biome is found predominantly within high-latitude regions of the Northern hemisphere, especially around the Arctic Circle.
“Its occurrence is linked to extremely cold climates, short growing seasons and permafrost conditions uncommon in the Southern hemisphere.”

Visibility from a trigonometrical station depends on elevation and absence of obstructing landforms. Figu and Ligo lie within the unobstructed field of sight from the station, based on their relative contour intervals and positions.
Their elevations place them above surrounding terrain, making direct line-of-sight more probable.

The map area is calculated by multiplying its length by its breadth, based on the given scale and grid spacing.
“The computed value aligns most closely with 288 sq km, which corresponds to the overall mapped coverage.”

The Eastern section displays widely spaced buildings and isolated homesteads, indicating a dispersed settlement pattern.
“This arrangement is typical in rural landscapes shaped by agricultural land use and topographical separation.”

In the cool temperate Northern hemisphere, south-facing slopes receive greater exposure to sunlight due to the sun’s apparent path.
“This increased insolation moderates temperatures, enhances comfort and supports agricultural and settlement activities.”