All practice questions

Match each environmental hazard in Nigeria with its primary environmental impact.

To check the severe gully expansion destroying farmland and infrastructure in parts of South-Eastern Nigeria, environmental engineers construct low, permeable barrier walls across gully channels using stones enclosed in wire mesh cages to trap sediment and reduce runoff velocity. Which soil erosion management technique is described?

During glacial retreat, unsorted and unstratified rock debris carried by a glacier is deposited directly by the melting ice to form ridges along the edges and snout of the glacial valley. Which of the following landforms is formed by this process?

In an Arithmetic Progression (A.P.), the sum of the first $10$ terms is $120$ and the sum of the next $10$ terms is $320$. What is the common difference of the progression?

Northwestern Europe experiences significantly milder winter temperatures and a lower annual temperature range than inland regions of Eurasia situated at the same latitude ($55^\circ\text{N}$). Which climatic control is primarily responsible for this maritime moderation?

Transportation networks and maritime trade corridors serve as vital trade gateways for African economies. Arrange the following major East African seaports in correct geographical sequence from North to South along the Indian Ocean coastline:

A regional transport planning board is evaluating four different transport network graph topologies that each connect five key industrial nodes ($v = 5$). Arrange the following network topologies in order of their topological connectivity as measured by the Beta Index ($\beta$), from the LOWEST connectivity level to the HIGHEST connectivity level.

Arrange the following commercial river ports and navigation hubs along the River Niger in Nigeria in geographical sequence, starting from the most upstream northern location to the lower southern course.

Arrange the following sequential stages in the process of soil salinization—a major form of environmental land degradation in semi-arid agricultural zones—from the initial human activity to the ultimate ecological impact.

Match each global environmental agreement or initiative on the left with its primary conservation mandate on the right.

Peat and lignite are classified as non-renewable natural resources because their natural rate of formation spans millions of years of geological processes, despite their organic plant origin.

Lake Victoria is the largest lake in Africa by surface area, yet it differs fundamentally in origin from neighbouring Great Lakes such as Lake Tanganyika and Lake Malawi. Which of the following geological processes best explains the formation of Lake Victoria?

Match each African agricultural system or farming practice listed on the left with its defining environmental adaptation or operational characteristic on the right.

Given the matrix $A = \begin{pmatrix} y & 5 \\ 3 & y+2 \end{pmatrix}$, if the determinant of $A$ is $9$ and $y > 0$, calculate the value of $y$.

Match each environmental hazard and degradation process observed in West Africa with its underlying physical mechanism and environmental consequence.

A meteorological station measures atmospheric moisture levels using two adjacent thermometers mounted together inside a Stevenson screen. Which instrument utilizes a dry bulb and a wet bulb covered in damp muslin to determine relative humidity?

In transport network analysis, a geographic planner models a regional planar road network connecting $6$ primary market towns ($v = 6$) via $9$ direct road links ($e = 9$). What is the Gamma index ($\gamma$) of connectivity for this transportation network?

On a humid tropical hillside, fence posts, terraced walls, and telephone poles are observed to tilt gradually downslope over several years without any sudden or catastrophic land movement. Which process is primarily responsible for this phenomenon?

Mass movement processes vary significantly in their mechanism and rate of downslope displacement under the influence of gravity. Arrange the following mass wasting processes in sequential order from the slowest rate of movement to the fastest rate of movement.

A geologist examining a rock specimen observes that it has a coarse-grained texture with large, visible mineral crystals of quartz and feldspar, indicating slow cooling deep beneath the Earth's surface. Which of the following rocks best matches this description?