Examkin

Regional Geography of Nigeria

181 soru

Tüm türler181Çoktan seçmeli105Doğru / Yanlış2Eşleştirme38Sıralama32Boşluk doldurma4
Soru 41Soru →

Nigeria is located in West Africa and is defined by specific geographical coordinates. Which of the following correctly describes the latitudinal extent of Nigeria?

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Cevap: 4∘N4^\circ\text{N} to 14∘N14^\circ\text{N}

Cevap

Nigeria extends between latitudes 4∘N4^\circ\text{N} and 14∘N14^\circ\text{N}.
Nigeria is located entirely in the Northern Hemisphere, spanning from latitude 4∘N4^\circ\text{N} at its southern coastal boundary to 14∘N14^\circ\text{N} at its northern boundary near Lake Chad.

Adım Adım Çözüm

1
Identify the geographical coordinate system dimension requested.
The question asks for the latitudinal extent, which measures distance north or south of the Equator.
Distinguishing latitude (north-south) from longitude (east-west) is required to select the correct coordinates.
2
Recall the absolute boundary limits of Nigeria.
Nigeria lies between latitude 4∘N4^\circ\text{N} at the Niger Delta coast and latitude 14∘N14^\circ\text{N} near Lake Chad in the north.
These coordinates define the northern and southern limits of the country.

Anahtar Kavram

Latitudinal Extent of Nigeria
Tahmini Süre:45s
Soru 42Soru →

Environmental degradation manifests differently across Nigeria's ecological zones. While gully erosion severely threatens the southeastern states and desertification impacts the far north, oil spillage poses a severe threat to the Niger Delta ecosystem. Which specialized federal regulatory body in Nigeria is specifically mandated to monitor, detect, and respond to oil spills?

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Cevap: National Oil Spill Detection and Response Agency (NOSDRA)

Cevap

The National Oil Spill Detection and Response Agency (NOSDRA) is the specialized regulatory agency in Nigeria mandated to monitor, detect, and coordinate response to oil spills.
The correct option is National Oil Spill Detection and Response Agency (NOSDRA). It was created in 2006 under the Ministry of Environment as a specialized institutional framework to implement the National Oil Spill Contingency Plan for Nigeria, focusing on environmental safety and restoration in oil-producing communities.

Adım Adım Çözüm

1
Identify the specific environmental hazard mentioned in the prompt
The target environmental hazard is oil spillage occurring in the Niger Delta oil-producing region of Nigeria.
Different environmental hazards in Nigeria fall under specialized institutional mandates.
2
Evaluate the statutory mandate of Nigerian environmental regulatory agencies
The National Oil Spill Detection and Response Agency (NOSDRA) was established under Decree 15 of 2006 specifically for oil spill management, whereas NESREA handles broader environmental enforcement outside the oil sector.
Distinguishing between general environmental enforcement agencies and specialized sector-specific agencies is essential in resource management.

Anahtar Kavram

Institutional Frameworks for Environmental Management in Nigeria
Tahmini Süre:50s
Soru 43Soru →

In evaluating agricultural systems and pastoral transhumance across Nigeria's latitudinal ecological zones, livestock herders in the northern Sudan and Sahel savannas routinely migrate southward toward the Guinea savanna and major river basins during the dry season, but return northward at the onset of the rainy season. Which of the following correctly identifies the primary environmental driver of this seasonal southward migration and the critical ecological constraint that necessitates their wet-season northward retreat?

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Cevap: Dry-season migration is driven by acute pasture and water shortages in the northern savanna, while the wet-season retreat is necessitated by the proliferation of tsetse flies and trypanosomiasis risk in humid vegetation zones.

Cevap

Dry-season migration is driven by acute pasture and water shortages in the northern savanna, while the wet-season retreat is necessitated by the proliferation of tsetse flies and trypanosomiasis risk in humid vegetation zones.
The correct choice accurately reflects the ecological dynamics of transhumance in Nigeria: dry-season movement southward is driven by the search for water and pasture in the Guinea savanna and river valleys, while the wet-season movement back northward is driven by the need to avoid tsetse fly infestation (which causes trypanosomiasis in cattle) and crop land conflicts in humid southern zones.

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1
Identify dry-season environmental conditions in the far north of Nigeria.
The tropical continental air mass (Harmattan) brings prolonged drought, drying up streams and desiccating grasslands in the Sudan and Sahel savannas.
Faced with feed and water scarcity, pastoral Fulani herdsmen migrate southward toward wetter ecological belts (Guinea savanna and floodplains).
2
Identify wet-season environmental constraints in the middle and southern belts.
With the retreat of the dry season and arrival of the moisture-laden tropical maritime air mass, vegetation in the middle belt becomes dense and humid.
High humidity and thick foliage foster vector breeding grounds for tsetse flies (Glossina spp.), which transmit fatal nagana (trypanosomiasis) to cattle, forcing herdsmen back to drier northern zones.
3
Evaluate options against verified geographic distributions and ecological facts.
The option pairing northern dry-season pasture/water deficits with southern wet-season tsetse fly infestation correctly captures the dual mechanism of transhumance.
Distractors contain spatial misallocations, such as placing tree cash crops or crude oil fields in northern savanna zones.

Anahtar Kavram

Ecological controls of pastoral transhumance and crop zoning in Nigeria
Soru 44Soru →

Complete the following statement by supplying the correct geographic name.

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The confluence of the River Niger and the River Benue is located at .
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Cevap

The confluence of the River Niger and the River Benue is located at Lokoja.
Lokoja is the landmark city where the River Benue flows into the River Niger, forming a Y-shaped confluence that drains south into the Atlantic Ocean through the Niger Delta.

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1
Identify the geographical point where Nigeria's two largest rivers meet.
River Niger and River Benue converge at Lokoja in Kogi State.
Lokoja serves as the prominent Y-shaped river confluence city in central Nigeria.

Anahtar Kavram

River Confluence of Nigeria
Soru 45Soru →

In Southeastern Nigeria, gully erosion poses a severe environmental hazard. What is the correct sequential order of the stages in the development of a gully, from initial land disturbance to catastrophic collapse?

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Cevap

The correct sequence begins with vegetation removal, followed by surface runoff forming micro-rills, which deepen into incised gullies, and culminates in massive sidewall collapse and severe structural land loss.
The erosion process follows a logical morpho-dynamic progression: human or natural land clearing first removes protective vegetation, allowing concentrated surface runoff to carve rills. Continuous concentrated water flow deepens these rills into gullies, which eventually undergo mass failure and sidewall slumping due to basal under-cutting and sub-surface seepage.

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1
Identify the primary trigger initiating soil exposure.
Land clearing and deforestation remove protective plant cover.
Without plant canopy and roots, soil aggregates break down easily under rain impact.
2
Trace the initial runoff response on bare soil slopes.
Surface runoff gathers momentum and carves small rills.
Water flows downhill along paths of least resistance, detaching topsoil particles.
3
Examine channel deepening under continuous rainfall.
Rills expand vertically and laterally into deep gullies.
Concentrated volume and velocity of water enhance hydraulic scouring along the channel floor.
4
Determine the final stage of structural collapse.
Under-cutting and seepage cause massive gully wall collapse.
Basal erosion and groundwater piping destabilize side slopes, triggering gravitational slumping.

Anahtar Kavram

Stages of Gully Erosion Process
Tahmini Süre:1m 15s
Soru 46Soru →

Match each Nigerian climatic zone listed on the left with its corresponding climatic characteristic on the right.

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Öğeler

Sub-equatorial Zone (Coastal Belt)
Tropical Continental Zone (Far North)
Highland Zone (Jos Plateau)
Tropical Hinterland Zone (Middle Belt)

Eşleşmeler

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Cevap

Sub-equatorial Zone matches with heavy rainfall with a distinct double-peak; Tropical Continental Zone matches with very short rainy season (3–4 months) and high temperature range; Highland Zone matches with lower temperatures resulting from high elevation; Tropical Hinterland Zone matches with moderate rainfall with a single maximum.
Each zone is correctly paired according to geographical controls: coastal sub-equatorial zones feature double-peak rainfall; far northern sub-Sahelian areas have brief wet seasons; highland regions have elevation-induced temperature drops; and middle belt hinterlands experience single-peak seasonal rainfall.

Adım Adım Çözüm

1
Identify coastal climate characteristics
Southern coastal regions have sub-equatorial climate with double rainfall maxima due to long exposure to the Maritime Tropical (mT) air mass.
Coastal proximity ensures prolonged moisture supply.
2
Identify northern continental climate characteristics
Far northern regions experience short rain periods (3-4 months) and a high annual temperature range due to dominant Continental Tropical (cT) air mass.
Distance from the ocean limits moisture availability.
3
Identify highland relief climate characteristics
Elevated areas like the Jos Plateau have cooler conditions due to lapse rate reduction of temperature with altitude.
Altitude modifies temperature independently of latitude.
4
Identify middle belt hinterland climate characteristics
Middle belt receives moderate rainfall with a single peak around July/August as the ITCZ advances and retreats.
Transition zone between wet south and dry north.

Anahtar Kavram

Climatic Zones of Nigeria and their distinguishing characteristics
Soru 47Soru →

In the Niger Delta region of Nigeria, managing oil spill hazards requires a systematic environmental response protocol. In what sequential order should the following steps be carried out from first to last?

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Cevap

The correct sequence begins with immediate physical containment using booms, followed by statutory damage inspection (Joint Investigation Visit), then bulk surface oil recovery, and finishes with long-term ecological restoration via bioremediation.
Effective environmental hazard management follows a logical progression: emergency containment prevents spatial expansion, statutory joint inspection evaluates the damage and cause, physical recovery removes mass contaminants, and biological remediation restores ecological stability.

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1
Identify the immediate containment action
Deploying physical containment barriers (booms) is the first step.
Immediate containment stops the crude oil from spreading further into river channels, farmlands, and sensitive mangrove ecosystems.
2
Identify the statutory assessment phase
Conducting a Joint Investigation Visit (JIV) comes second.
Environmental regulations in Nigeria require a multi-stakeholder inspection to document the cause, legal liability, and volume of the spill before full cleanup commences.
3
Identify the primary cleanup operation
Skimming and recovering free-phase crude oil is the third step.
Removing heavy surface oil prevents toxic buildup and clears the way for deeper soil treatment.
4
Identify the final ecosystem restoration step
Applying long-term bioremediation techniques is the fourth and final step.
Biological treatment breaks down lingering hydrocarbon molecules to gradually rehabilitate degraded land and water quality over time.

Anahtar Kavram

Oil Spill Management Protocol and Environmental Remediation in Nigeria
Soru 48Soru →

A soil scientist conducts a field transect across Nigeria, traveling along a direct line of longitude from the southern coast along the Gulf of Guinea up to the northern boundary with Niger Republic. Arrange the following major soil groups in the precise sequential order in which they are encountered from South to North.

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Cevap

The correct South-to-North sequence begins with coastal Hydromorphic soils, followed by rainforest Ferrallitic soils, middle-belt Ferruginous tropical soils, and ends with northern semi-arid Regosols/brown soils.
The latitudinal gradient of climate and vegetation across Nigeria directly controls soil formation from south to north. The sequence starts at the Atlantic coast with waterlogged Hydromorphic soils, transitions to heavily leached Ferrallitic soils under the southern rainforest, moves into seasonally dry Ferruginous tropical soils in the Guinea Savanna, and concludes at the northern arid border with wind-deposited Regosols and brown soils.

Adım Adım Çözüm

1
Identify coastal low-latitude soil belt (4°–6°N)
The southernmost zone consists of waterlogged deltaic and mangrove environments giving rise to Hydromorphic soils.
High water tables and tidal inundation at the coast prevent profile differentiation and produce gleys and alluvial deposits.
2
Identify humid rainforest soil belt (5°–8°N)
Moving inland, heavy precipitation causes intense leaching resulting in deeply weathered Ferrallitic soils (Acid Sands).
Abundant rainfall removes soluble bases, leaving iron and aluminum oxides in the subsoil.
3
Identify sub-humid savanna soil belt (8°–11°N)
In the Middle Belt, seasonal wet-dry savanna conditions foster Ferruginous tropical soils over crystalline rocks.
Moderate leaching with distinct dry seasons causes iron accumulation and plinthite/laterite layer formation.
4
Identify semi-arid northern soil belt (11°–14°N)
At the northern border, scanty rainfall and wind action yield sandy Regosols and brown soils derived from desert drift.
Harmattan winds bring aeolian sand deposits where chemical weathering is minimal due to low precipitation.

Anahtar Kavram

Latitudinal Zonal Soil Distribution in Nigeria
Soru 49Soru →

Which environmental hazard refers to the progressive land degradation and encroachment of arid, desert-like conditions in the northern savanna belts of Nigeria?

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Cevap: Desertification

Cevap

The correct option is Desertification, which describes the environmental degradation process resulting in the loss of vegetation cover and land desiccation across northern Nigeria.
Desertification is the primary environmental hazard threatening the far northern states of Nigeria (such as Yobe, Borno, Sokoto, and Katsina). It is driven by prolonged drought, deforestation, and overgrazing, leading to loss of topsoil and vegetation.

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1
Identify the geographical context and environmental characteristic described in the prompt.
The prompt describes land degradation and desert-like encroachment occurring specifically in northern Nigeria's savanna belts.
Geographical location (northern Nigeria) and physical symptoms (arid conditions) define the specific hazard type.
2
Match the environmental hazard definition to the spatial region.
Desertification refers explicitly to the degradation of land in dryland/savanna areas into desert condition.
This directly aligns with the climatic conditions of the Sahel and Sudan savanna zones in northern Nigeria.

Anahtar Kavram

Spatial Distribution of Environmental Hazards in Nigeria
Soru 50Soru →

Which government agency in Nigeria is specifically charged with detecting, monitoring, and enforcing clean-up operations for oil spillage incidents?

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Cevap: National Oil Spill Detection and Response Agency (NOSDRA)

Cevap

The National Oil Spill Detection and Response Agency (NOSDRA) is the designated federal body empowered to detect and manage oil spill hazard responses in Nigeria.
The National Oil Spill Detection and Response Agency (NOSDRA) was established under federal law to oversee the implementation of the National Oil Spill Contingency Plan and ensure prompt response and remediation for oil spill hazards.

Adım Adım Çözüm

1
Identify the environmental hazard specified in the question.
The hazard is oil spillage associated with petroleum operations.
Nigeria uses specialized regulatory bodies to manage distinct environmental hazards.
2
Match the hazard to its corresponding statutory regulatory agency in Nigeria.
NOSDRA holds the specific mandate for oil spill detection, containment, and site remediation.
While general environmental enforcement falls under NESREA, oil pollution management was assigned exclusively to NOSDRA.

Anahtar Kavram

Environmental hazard regulation and statutory agency mandates in Nigeria
Tahmini Süre:45s
Soru 51Soru →

Arrange the following major Nigerian soil types in sequential order from the semi-arid northern border down to the southern Atlantic coastline.

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Cevap

The correct sequential order from north to south is: Regosols and Brown soils of the northern semi-arid zone, Ferruginous tropical soils of the central savanna belt, Ferrallitic red soils of the southern rainforest belt, and Hydromorphic and alluvial soils of the coastal delta.
The geographical transect across Nigeria from north to south follows a gradient of increasing annual rainfall and vegetative cover. Starting at the northern border, thin Regosols and Brown soils predominate under semi-arid conditions. Moving south into the central Guinea savanna, Ferruginous tropical soils develop over crystalline rocks. Further south in the humid rainforest belt, high rainfall causes deep leaching to form Ferrallitic red soils. Finally, at the extreme south along the Atlantic coastline and Niger Delta, permanently wet conditions create Hydromorphic and alluvial swamp soils.

Adım Adım Çözüm

1
Identify the northernmost soil zone near the border with Niger Republic.
Regosols and Brown soils occur in the far north due to low annual rainfall and sparse vegetation.
Extreme northern Nigeria experiences semi-arid conditions that produce shallow, sandy soils.
2
Identify the middle belt soil zone south of the northern semi-arid zone.
Ferruginous tropical soils dominate the central savanna region.
Moderate rainfall and seasonal wetting/drying cycles in the savanna lead to iron oxide accumulation in central Nigeria.
3
Determine the soil zone covering the southern interior forest belt.
Ferrallitic red soils (Latosols) occupy the high-rainfall southern forest belt.
High temperature and heavy precipitation promote intense chemical weathering and leaching in southern rainforests.
4
Identify the southernmost coastal soil zone.
Hydromorphic and alluvial soils form along the coastal belt and Niger Delta.
River deposition and ocean inundation create swampy, poorly drained soils along the Atlantic coast.

Anahtar Kavram

Zonal distribution of Nigerian soils from north to south
Soru 52Soru →

Tin and columbite are major solid minerals extracted in Nigeria. In which of the following regions are these minerals predominantly mined?

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Cevap: Jos Plateau

Cevap

Tin and columbite are predominantly mined on the Jos Plateau.
The Jos Plateau in north-central Nigeria is the principal mining region for tin ore (cassiterite) and columbite, as these minerals are naturally associated in the Jurassic Younger Granites of the area.

Adım Adım Çözüm

1
Identify the primary geological occurrence of tin and columbite in Nigeria.
Tin (cassiterite) and columbite occur in associated placer deposits on the Jos Plateau within Plateau State.
Geological weathering of Younger Granites on the plateau produced rich alluvial deposits of both minerals.

Anahtar Kavram

Spatial distribution of solid minerals in Nigeria
Tahmini Süre:45s
Soru 53Soru →

Historical tin and columbite extraction on the Jos Plateau left extensive open-cast pits (paddocks) and toxic spoil heaps, creating severe land degradation and safety risks. Which of the following interventions represents the most effective and ecologically appropriate land management strategy for restoring these degraded mine sites?

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Cevap: Reclaiming the terrain by leveling spoil heaps, backfilling abandoned paddocks, and re-vegetating with fast-growing, drought-resistant tree species

Cevap

Reclaiming the terrain by leveling spoil heaps, backfilling abandoned paddocks, and re-vegetating with fast-growing, drought-resistant tree species
The correct strategy for restoring degraded tin-mining landscapes on the Jos Plateau combines mechanical earthwork (leveling spoil heaps and backfilling excavated paddocks) with biological stabilization (re-vegetation and afforestation). This resolves structural hazards, reduces ponding, and initiates soil recovery.

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1
Identify the nature of the environmental hazard and its geographic location
The hazard consists of open-cast mining pits (paddocks) and spoil mounds caused by solid mineral extraction (tin and columbite) on the Jos Plateau in North-Central Nigeria.
Understanding the physical characteristics of the degradation determines the appropriate restoration engineering strategy.
2
Evaluate the appropriate physical and biological restoration methods
Open pits require earth-moving operations (leveling mounds and backfilling pits) followed by biological stabilization via tree planting (afforestation).
Mechanical reshaping removes physical hazards and water-logging, while vegetation prevents ongoing soil erosion and restores fertility.
3
Distinguish correct institutional mandates and mineral locations from distractors
Solid mineral degradation falls under land reclamation policies, whereas oil spill agencies (NOSDRA) and petroleum basin hazards belong to the Niger Delta coastal region.
Regulatory frameworks and remediation techniques must align with the specific hazard type and regional geography.

Anahtar Kavram

Land Degradation and Reclamation in Nigerian Mining Regions
Tahmini Süre:2m 0s
Soru 54Soru →

Match each agricultural crop produced in Nigeria with its primary ecological or vegetation zone of cultivation.

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Öğeler

Cocoa
Millet
Oil Palm

Eşleşmeler

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Cevap

Cocoa matches with the Rainforest zone of Southwestern Nigeria, Millet matches with the Sudan Savanna zone, and Oil Palm matches with the Oil Palm / Forest belt of Southern Nigeria.
Cocoa thrives in the warm, humid rainforest conditions of southwestern Nigeria (such as Ondo, Osun, and Oyo states). Millet is adapted to drier conditions and shorter rainy seasons typical of the Sudan Savanna in northern Nigeria. Oil palm flourishes in the wet southern forest belt characterized by high rainfall.

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1
Analyze the climatic and vegetation requirements for each listed crop in Nigeria.
Cocoa requires forest conditions with moderate-to-high rainfall, Millet requires low rainfall savanna conditions, and Oil Palm requires very high humidity and heavy rainfall.
Crop distribution across Nigeria closely follows the latitudinal gradient of annual rainfall from south to north.
2
Pair each crop with its matching ecological region.
Cocoa corresponds to the Southwestern Rainforest zone, Millet to the Sudan Savanna, and Oil Palm to the humid Southern Forest belt.
Matching each crop to its ecological belt reflects its geographic distribution in Nigerian agriculture.

Anahtar Kavram

Geographic Distribution of Crop Belts in Nigeria
Soru 55Soru →

The Jos Plateau functions as the primary hydrological hub of Nigeria from which several major rivers radiate. How do the high elevation and structural relief of this plateau influence the regional destination of its surrounding river systems?

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Cevap: Headwaters flow radially outward from the central high elevation, with northern streams discharging into the interior Lake Chad basin and southern and western streams feeding the Niger-Benue river system.

Cevap

Headwaters flow radially outward from the central high elevation, with northern streams discharging into the interior Lake Chad basin and southern and western streams feeding the Niger-Benue river system.
The Jos Plateau acts as Nigeria's main hydrographic center. Due to its elevated domed structure, rivers radiate in multiple directions: northern rivers (such as the Hadejia-Jama'are system) drain northeastward into the closed inland Lake Chad basin, while rivers flowing west, south, and southeast (such as the Kaduna and Gongola rivers) feed into the Niger-Benue system.

Adım Adım Çözüm

1
Identify the structural relief character of the Jos Plateau.
The Jos Plateau is a high highland dome rising over 1,200 meters above sea level in central Nigeria.
Topographic elevation dictates the directional flow of headwaters.
2
Analyze the drainage pattern generated by an elevated highland dome.
A high central point surrounded by lower plains develops a radial drainage pattern where rivers flow outward in all compass directions.
Gravity causes water to flow down slope away from the high central plateau.
3
Trace the major regional river destinations from the plateau.
Streams flowing north and northeast (e.g., Hadejia, Jama'are) empty into the inland Lake Chad drainage basin, while streams flowing west and south (e.g., Kaduna, Gongola, Ankwe) join the Niger-Benue drainage network.
Nigeria is divided into two primary drainage realms: the Atlantic/Niger-Benue system and the interior Lake Chad basin.

Anahtar Kavram

Radial Drainage Pattern and Hydrographic Center of Nigeria
Tahmini Süre:1m 30s
Soru 56Soru →

Fill in the blanks to complete the statement detailing the structural relief and inland drainage features of northeastern Nigeria.

Aşağıdaki boşlukları doldurun

Formed by volcanic activity, the Plateau is distinguished by its basaltic lava flows and crater landforms. The primary river system draining the surrounding semi-arid region northeastward into Lake Chad is the River.
Cevabı ve açıklamayı göster

Cevap

The first blank is Biu (or Biu Plateau) and the second blank is Komadugu Yobe (or Yobe).
The Biu Plateau is a distinct volcanic highland in northeastern Nigeria formed by young basaltic lava flows, featuring crater lakes such as Lake Tilla. The Komadugu Yobe River system drains this semi-arid region northeastward into Lake Chad, forming Nigeria's principal inland drainage network.

Adım Adım Çözüm

1
Identify the young volcanic plateau region in northeastern Nigeria characterized by basaltic lava flows and crater lakes.
The Biu Plateau located in Borno and Yobe states is a basaltic highland formed by Tertiary and Quaternary volcanic activity, containing landforms like Lake Tilla.
Relief identification based on structural rock formation and volcanic origin.
2
Identify the principal river system draining northeastern Nigeria into the Lake Chad inland drainage basin.
The Komadugu Yobe River (formed by tributaries such as the Hadejia and Jama'are rivers) drains northeastward into Lake Chad.
Drainage system classification based on regional slope and inland catchment destination.

Anahtar Kavram

Volcanic relief landforms of the Biu Plateau and the Chad inland drainage system of Nigeria.
Soru 57Soru →

A meteorological station located in northern Nigeria records a single rainfall maximum in August, an annual total precipitation of approximately 850 mm, a dry season lasting 5 to 6 months characterized by severe Harmattan conditions, and a relatively high annual temperature range. Which climatic zone of Nigeria does this station represent?

Cevabı ve açıklamayı göster

Cevap: Tropical Continental (Sudan) Climate

Cevap

The meteorological characteristics describe the Tropical Continental (Sudan) Climate zone located in northern Nigeria.
The correct answer is the Tropical Continental (Sudan) Climate. Northern Nigeria lies under the influence of the dry continental Tropical (cT) air mass for most of the year, yielding a single rainfall maximum in August (when the maritime air mass penetrates furthest north), low annual rainfall (~500–1000 mm), a prolonged dry season with Harmattan, and higher annual temperature fluctuations.

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1
Analyze the rainfall regime and distribution
Single rainfall peak in August with ~850 mm total indicates a short rainy season restricted to the months when the Inter-Tropical Convergence Zone (ITCZ) reaches its northernmost extent.
Rainfall in Nigeria decreases in duration and quantity from south to north.
2
Evaluate the dry season duration and air mass influence
A 5 to 6 month dry season with intense Harmattan indicates dominant influence of the dry continental Tropical (cT) air mass originating from the Sahara Desert.
The cT air mass controls northern Nigeria for more than half the year as the ITCZ retreats southward.
3
Synthesize thermal and moisture characteristics to identify the climatic zone
High annual temperature range, lower annual rainfall, single peak, and strong Harmattan are classic attributes of the Tropical Continental (Sudan climate) region.
Distinguishes northern interior climate from humid southern coastal belts and modified plateau microclimates.

Anahtar Kavram

Spatial variation of climatic zones and air mass dynamics in Nigeria
Tahmini Süre:1m 30s
Soru 58Soru →

Arrange the following sequential stages in the agro-allied manufacturing of cotton textiles in Nigeria (such as in Kaduna and Kano industrial clusters), from raw material extraction to the final finished product.

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Cevap

The correct sequence starts with ginning harvested seed cotton to separate lint, followed by spinning lint into yarn, then weaving yarn into raw fabric, and concludes with dyeing, printing, and finishing the fabric.
In Nigeria's agro-based textile industry, processing follows a strict forward supply sequence: raw seed cotton is first ginned to remove seeds, the resulting lint is spun into yarn, the yarn is woven into raw cloth, and finally the fabric is dyed and finished for distribution.

Adım Adım Çözüm

1
Identify the primary raw agricultural input processing step
Ginning of raw seed cotton (separating fibers from seeds) must occur first before fibers can be processed.
Raw cotton harvested from farms contains seeds that must be removed mechanically at ginning mills.
2
Determine the intermediate fiber-processing stage
Cleaned lint is spun into yarn or thread.
Individual cotton fibers must be twisted and drawn out into continuous threads before fabric construction.
3
Determine the fabric construction stage
Yarn is woven or knitted into gray (raw) cloth.
Industrial looms interlock the spun yarn into a cohesive sheet of fabric.
4
Identify the final value-addition and finishing stage
Fabric is dyed, printed, and finished for commercial sale.
Chemical treatment, coloring, and patterning are the final steps before textiles are sent to apparel manufacturers or markets.

Anahtar Kavram

Agro-Allied Textile Processing Stages in Nigeria
Tahmini Süre:1m 0s
Soru 59Soru →

Match each Nigerian mineral or energy resource site on the left with its corresponding geographical location or industrial application on the right.

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Öğeler

Shiroro Power Station
Coal deposits of the Mamu Formation
Itakpe Hill deposits
Ewekoro and Gboko reserves

Eşleşmeler

Cevabı ve açıklamayı göster

Cevap

Shiroro Power Station matches the hydroelectric dam on the Kaduna River in Niger State; Coal deposits of the Mamu Formation match sub-bituminous coal fields centered around Enugu and Kogi States; Itakpe Hill deposits match high-grade iron ore reserves supplying the domestic steel industry in Kogi State; Ewekoro and Gboko reserves match sedimentary limestone deposits providing raw materials for cement manufacturing in Ogun and Benue States.
Each resource site correctly maps to its geographical location and primary application: Shiroro is a major hydroelectric station on the Kaduna River in Niger State; coal is extracted from Cretaceous Mamu Formation strata in Enugu and Kogi; Itakpe in Kogi contains high-grade iron ore reserves; Ewekoro and Gboko supply key limestone inputs for regional cement industries.

Adım Adım Çözüm

1
Identify the primary river basin and host state for the Shiroro Hydroelectric Power scheme.
Shiroro Dam is situated across the Kaduna River in Niger State.
This establishes the correct hydroelectric energy site association.
2
Examine the geological formation and spatial occurrence of coal in Nigeria.
Coal occurs in the Cretaceous sedimentary Mamu Formation, notably at Enugu and Okaba in Kogi State.
This links sub-bituminous coal to its primary geological host formation and regions.
3
Locate the primary iron ore extraction field supporting Nigeria's iron and steel development.
Itakpe Hill in Kogi State contains major high-grade iron ore deposits.
Itakpe supplies the raw ore for domestic steel processing plants.
4
Correlate major industrial limestone quarrying sites with regional cement plants.
Ewekoro (Ogun State) and Gboko (Benue State) harbor rich sedimentary limestone beds.
Limestone is the fundamental calcium carbonate raw material for industrial cement production.

Anahtar Kavram

Geographical distribution, geological context, and industrial uses of Nigeria's mineral and energy resources
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A commercial agricultural enterprise plans to establish large-scale cocoa and oil palm plantations in Nigeria. Based on the spatial distribution of climatic conditions and vegetation belts across the country, which region provides the most ecologically suitable environment for these perennial cash crops?

Cevabı ve açıklamayı göster

Cevap: The humid rainforest and derived savanna belts of southern Nigeria, characterized by annual rainfall exceeding 1500 mm1500\text{ mm} and a long wet season.

Cevap

The humid rainforest and derived savanna belts of southern Nigeria provide the ecologically optimal conditions of high rainfall (>1500 mm>1500\text{ mm}) and short dry seasons required for perennial cash crops like cocoa and oil palm.
The humid rainforest and derived savanna belts of southern Nigeria receive abundant rainfall (>1500 mm>1500\text{ mm} annually) with high atmospheric humidity and minimal dry-season moisture stress, matching the precise ecological envelope needed for cocoa and oil palm cultivation.

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1
Analyze crop ecological requirements
Cocoa (*Theobroma cacao*) and oil palm (*Elaeis guineensis*) are perennial tree crops requiring high humidity, temperatures between 24∘C24^\circ\text{C} and 30∘C30^\circ\text{C}, and high rainfall (>1500 mm>1500\text{ mm}) evenly distributed with a short dry period.
Tree cash crops cannot survive prolonged moisture deficits or low relative humidity.
2
Map requirements onto Nigerian ecological zones
Southern Nigeria (comprising states like Ondo, Cross River, Edo, Ogun, and Osun) falls within the Tropical Rainforest belt, receiving over 1500–3000 mm1500\text{--}3000\text{ mm} of rainfall annually.
The latitudinal gradient of rainfall decreases from south to north across Nigeria.
3
Evaluate and eliminate unsuitable northern zones
Savanna belts (Guinea, Sudan, Sahel) in northern Nigeria experience dry seasons ranging from 5 to 9 months and rainfall under 1000 mm1000\text{ mm}, supporting grain crops (millet, sorghum) and groundnuts rather than tree crops.
Misattributing forest crops to northern savanna belts represents a common spatial geography misconception.

Anahtar Kavram

Ecological Zonation of Agricultural Crops in Nigeria
Tahmini Süre:1m 30s
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Regional Geography of Nigeria Alıştırma Soruları — JAMB UTME — Sayfa 3 | Examkin