Welcome to “Naijaclass Academy“ For Neco Geography Objective And Practical/Physical Answer 2025

Tuesday  1st July, 2025

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GEOGRAPHY OBJ
01-10: BBEABCAEDB
11-20: DBEBDACBED
21-30: BCAEBBEEBA
31-40: AADAEDEBAC
41-50: ABDBCCDAAA
51-60: ADEDCABDCE

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(3a)
(i) Granite
(ii) Basalt
(iii) Gabbro

(3b)
(i) Texture:
Igneous rocks show different textures depending on their cooling rate. When magma cools slowly beneath the Earth’s surface, it forms coarse-grained rocks with large, visible crystals, such as granite. When lava cools quickly on the surface, it forms fine-grained or glassy rocks with small or no visible crystals, like basalt. This texture difference helps identify how the rock formed.

(ii) Mineral Composition:
Igneous rocks are made mainly of silicate minerals. Felsic rocks contain high amounts of silica and light-colored minerals such as quartz and feldspar, making them lighter in color and less dense. Mafic rocks have more iron and magnesium-rich dark minerals like pyroxene and olivine, making them darker and denser. This composition influences the rock’s appearance and physical properties.

(iii) Origin from magma.:
Igneous rocks form from the cooling and solidification of molten rock called magma (underground) or lava (on the surface). Those that cool slowly underground are called intrusive rocks, while those that cool quickly on the surface are extrusive rocks. This origin from molten material distinguishes igneous rocks from sedimentary and metamorphic rocks.

(3c)
(i) Building materials: Rocks like granite and basalt are used in construction for buildings, roads, and monuments.
(ii) Source of minerals and metals: Many igneous rocks contain valuable minerals such as gold, copper, and diamonds.
(iii) Industrial raw materials: Rocks provide materials like sand, gravel, and crushed stone for industrial uses.
(iv) Soil formation: Weathering of rocks contributes to soil development, which supports agriculture.
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(4a)
(i) Annual Temperature
Mean Annual: Temperature = (Sum of monthly temperatures) / Number of months
= (27 + 27 + 28 + 28 + 28 + 28 + 27 + 27 + 27 + 27 + 26 + 28) / 12
= 328 / 12
= 27.33°C

(ii) Mean Annual Rainfall:
Mean Annual Rainfall = (Sum of monthly rainfall) / Number of months
= (178 + 178 + 180 + 200 + 250 + 270 + 240 + 220 + 260 + 280 + 190 + 170) / 12
= 2616 / 12
= 218 mm

(iii) Rainfall Range:
Rainfall Range = Highest monthly rainfall – Lowest monthly rainfall
= 280 mm (October) – 170 mm (December)
= 110 mm
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(5a)
A karst region is a landscape formed mainly by the dissolution of soluble rocks such as limestone, characterized by features like barren rocky ground, caves, sinkholes, underground rivers, and the absence of surface streams and lakes. It results from the chemical erosion of bedrock by slightly acidic water.

(5b)
(i) Caves
(ii) Stalactites and Stalagmites
(iii) Underground Rivers
(iv) Sinkholes
(v) Dripstone Columns

(5c)
(i) Provides vast underground water reservoirs (aquifers) supplying clean drinking water.
(ii) Source of minerals such as limestone used in cement and construction.
(iii) Tourist attractions due to caves and unique landscapes, supporting local economies.
(iv) Fertile soils in some karst areas support agriculture despite rocky terrain.

(5d)
(i) Sinkhole collapse
(ii) Poor surface water availability
(iii) Soil erosion
(iv) Water pollution risk
(v) Unstable ground for construction
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2025 NECO GEOGRAPHY PRACTICAL

(6a)
Environmental balance, also known as ecological balance, is the state of dynamic equilibrium within an ecosystem where living organisms and their physical environment interact in a stable and sustainable way. This balance ensures that populations of species and environmental factors coexist without causing harm to the ecosystem’s health or stability.

(6b)
(i) Conservation of biodiversity to ensure ecosystem resilience.
(ii) Sustainable use of natural resources to avoid depletion.
(iii) Pollution control to prevent environmental degradation.
(iv) Protection and restoration of habitats and ecosystems.

(6c)
(i) Loss of fertile topsoil:
Erosion removes the nutrient-rich upper layer of soil, reducing soil fertility. This negatively affects plant growth, leading to decreased vegetation cover and lower agricultural productivity, which can disrupt food chains in the ecosystem.

(ii) Sedimentation of water bodies:
Eroded soil particles are carried into rivers and lakes, causing sedimentation. This can reduce water quality, harm aquatic life by destroying habitats, and disrupt the balance of aquatic ecosystems.
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2025 NECO GEOGRAPHY PRACTICAL

(8a)
(i) Maps
(ii) Satellite remote sensing images
(iii) Global Positioning System (GPS) data
(iv) Surveying and field measurements

(8b)
(i) Crime mapping and hotspot identification:
GIS can analyze spatial data on crime incidents to identify patterns and hotspots where crimes frequently occur. By mapping these areas, security agencies can allocate personnel and resources more efficiently, plan patrol routes, and implement targeted interventions to prevent crime. This proactive approach helps reduce crime rates and improves public safety.

(ii) Monitoring and tracking insurgent movements:
GIS integrates real-time data from satellite imagery, drones, and field reports to monitor the movement of insurgent groups or armed militants. This spatial intelligence allows security forces to anticipate attacks, plan strategic operations, and respond quickly to emerging threats. It enhances coordination among agencies and improves the effectiveness of counter-insurgency efforts.

(iii) Disaster and conflict management:
During conflicts or security crises, GIS supports emergency response by mapping affected areas, identifying safe evacuation routes, and locating shelters or aid distribution points. It helps in coordinating relief efforts and minimizing civilian casualties. GIS also assists in post-conflict reconstruction by assessing damage and planning rehabilitation.

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Neco Geography Objective And Practical/Physical Answer 2025Neco Geography Objective And Practical/Physical Answer 2025

Neco Geography Objective And Practical/Physical Answer 2025