JAMB Geography 2024 Past Questions & Answers

A megalopolis represents the highest level in the hierarchy of urban settlements. It is formed when several large cities and their surrounding areas, known as conurbations, grow and merge into one vast, continuous urban region. Therefore, a megalopolis is significantly larger than a single city or a conurbation.

Common mistake: Students often mistakenly choose 'Conurbation' because it is a very large urban area, but they forget that a megalopolis is even larger, as it is typically formed when several conurbations merge.

The location of the Ajaokuta iron and steel industry is primarily influenced by the availability of key raw materials. Iron ore from Itakpe and limestone from Ewekoro are essential for steel production, making their proximity a major factor. These raw materials are heavy and bulky, so locating the industry near them reduces transportation costs significantly.

Common mistake: Students might be tempted to include coal or river port as factors, as they are also important for industries. However, the question asks for the *best* explanation, and the immediate availability of primary raw materials like iron ore and limestone is paramount for an iron and steel industry.

Urban settlements, such as cities and towns, are defined by their economic functions, which are mainly manufacturing (secondary activities) and providing services like banking, healthcare, and trade (tertiary activities). Rural settlements, on the other hand, are characterized by primary activities like farming, fishing, and forestry. Therefore, the dominance of secondary and tertiary activities is a key feature that distinguishes urban areas from rural ones.

Common mistake: Students may wrongly select option A, confusing primary activities like farming (which are dominant in rural areas) with secondary activities like manufacturing.

Insufficient storage facilities are a major problem in Nigerian agriculture because they lead to significant post-harvest losses. A large portion of harvested crops spoils due to lack of proper storage, reducing farmers' income and food availability. This directly hinders the growth and development of the agricultural sector in the country.

Common mistake: Students might incorrectly choose 'insufficient labour' (B) if they assume a general shortage of farm workers, but the more critical and widespread issue impacting agricultural development and food security in Nigeria is post-harvest loss due to poor storage.

The question describes rocks that are formed in layers and derived from old rocks and dead organic materials. This process of formation, involving the accumulation and compaction of sediments, is characteristic of sedimentary rocks. They are unique among rock types for their layered appearance and often contain fossils.

Common mistake: Students might mistakenly choose igneous or metamorphic rocks if they don't clearly understand the distinct formation processes for each rock type, especially the role of layering and organic remains in sedimentary rock formation.

The Cross River basin, located in southeastern Nigeria, is a significant geographical region. While primarily known for its extensive river network and rainforests, it encompasses diverse topography. Some parts of the basin, particularly towards its fringes or in areas of older rock outcrops, can exhibit undulating plains and isolated granitic hills. Its broad extent across southeastern Nigeria contributes to its substantial size.

Common mistake: Students might mistakenly choose option D (North-Central highlands) because its description of flat surfaces dotted with granitic hills aligns more closely with the characteristics of the Jos Plateau and surrounding areas.

The solar system is made up of the Sun and all the celestial bodies that orbit it, including planets, dwarf planets, moons, asteroids, and comets. Following the reclassification of Pluto in 2006, there are now officially eight major planets in our solar system. These are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.

Common mistake: Many students might incorrectly choose 'nine planets' (Option A) because they learned about Pluto as a planet before its reclassification as a dwarf planet in 2006.

On June 21st, the Earth's Northern Hemisphere is tilted most directly towards the sun, causing the sun's rays to be directly overhead at the Tropic of Cancer. This astronomical event is known as the summer solstice in the Northern Hemisphere. Consequently, places in the Northern Hemisphere experience their longest day and shortest night of the year.

Common mistake: Students might incorrectly choose 'shorter day and longer night' if they confuse the summer solstice in the Northern Hemisphere with the winter solstice, or if they misunderstand the effect of the Earth's axial tilt on day length.

The correct option is Mining because its effect on population density is very localized. While mining towns like Jos or Port Harcourt are densely populated, they are small areas compared to the vast regions affected by factors like fertile land (which attracts farmers), tsetse fly infestation (which repels settlers), and thick forests (which hinder settlement). These other factors influence population distribution across much larger parts of the country, making them more significant overall.

Common mistake: Students might mistakenly choose 'Thick forest vegetation', thinking that modern technology makes forests easy to clear, but historically and even today, dense vegetation remains a significant natural barrier to large-scale settlement and agriculture.

This question tests a student's knowledge of the geographical location of countries within a specific region (the Horn of Africa). Such knowledge is primarily acquired and reinforced through the study and interpretation of geographical maps, which allows one to identify countries and their regional affiliations. Therefore, it falls under the practical skill of map reading and interpretation.

Common mistake: Students often confuse countries bordering the Horn of Africa (like Kenya) with those strictly considered part of the region, or simply lack general knowledge of African political geography.

The Mediterranean climate is characteristically found on the western coasts of continents, typically between latitudes 30° and 40° North and South of the Equator. This climate experiences hot, dry summers and mild, rainy winters. The location described in the question perfectly matches the global distribution of the Mediterranean climatic type.

Common mistake: Students might mistakenly choose 'China type' because it is also found in similar latitudes, but it occurs on the eastern margins of continents, not the western margins.

The question asks to identify which option is NOT a sea route. Options A, B, and C all list major port cities or regions connected by sea. Option D, London-Moscow-Baghdad, is not a sea route because Moscow and Baghdad are inland cities without direct access to the sea, making sea travel between these points impossible.

Common mistake: Students might incorrectly choose an option that includes a known port city like London, without fully considering the inland nature of other cities in the route like Moscow and Baghdad.

Wind action is more effective in arid regions primarily because of the lack of vegetation cover and the presence of loose, dry surface materials. In these dry environments, there are few plants to bind the soil with their roots, leaving the surface exposed. The absence of moisture also means surface particles are not cohesive, making them easily picked up and transported by wind, leading to significant wind erosion and deposition.

Common mistake: Students might choose option D, 'Insufficient and unreliable rainfall,' because it describes a characteristic of arid regions, but it doesn't directly explain the *mechanism* by which wind becomes the predominant agent of denudation.

A cement factory is a weight-losing industry, meaning the raw materials (like limestone) are much heavier and bulkier than the final product (cement). To save money on high transportation costs, it is more economical to locate the factory close to the source of these heavy raw materials. The finished, lighter cement can then be transported to the market more cheaply.

Common mistake: Students often mistakenly choose 'the market' because it is a valid factor for many industries, but for industries where raw materials are heavy and lose weight during production, proximity to the raw material source is the most important factor.

Fold mountains are created when two of the Earth's tectonic plates push against each other. This immense pushing pressure is called a compressional force. This force causes the rock layers in the crust to buckle and fold upwards, forming large mountain ranges like the Himalayas and the Atlas Mountains.

Common mistake: Students may mistakenly choose 'block mountains' because they are also formed by tectonic forces, but they result from faulting (cracking and vertical movement of rock blocks) rather than the folding caused by compression.

Mechanical weathering involves the physical breakdown of rocks into smaller fragments without changing their chemical composition. Processes like temperature changes (expansion and contraction), frost action (water freezing in cracks), and alternate wetting and drying (swelling and shrinking of minerals) physically break rocks apart. Rain action, however, primarily contributes to chemical weathering (e.g., dissolution) or erosion by washing away loose particles, rather than directly causing mechanical disintegration of solid rock.

Common mistake: Students often confuse the erosional or chemical effects of rain with its direct mechanical weathering capabilities, leading them to incorrectly select it as a cause of mechanical weathering.

The question requires you to identify a region in Nigeria with an average height exceeding 100 metres. The Biu Plateau, a highland area in Borno State, has an average elevation of about 700 metres, which is significantly over 100 metres. While all the other options are also highlands with elevations much greater than 100 metres, the Biu Plateau is a correct answer that satisfies the condition stated in the question.

Common mistake: Students might get confused and select the North-Central Highlands (Jos Plateau) or Adamawa Highlands because they are famously much higher, not realizing the question sets a very low threshold of just 'over 100 metres' which all the options meet.

The question asks about a dam that provides both irrigation water and hydro-electricity. Dams are major infrastructure projects designed for the management and utilization of water resources. This falls under the broader theme of how humans interact with and manage environmental resources for various purposes, including energy generation and agricultural support.

Common mistake: Students might choose other prominent African dams like Kainji or Cabora Bassa, which are also known for hydro-electricity, but Akosombo is a classic example often cited for its dual role in both power generation and irrigation.

A conurbation is a large urban area formed when several towns or cities expand and merge together, creating a continuous built-up area. Option B accurately describes this phenomenon, where many towns join over a significant area. This concept is fundamental to understanding urban settlement patterns.

Common mistake: Students might choose option C, confusing a conurbation with a metropolitan area where towns might retain more distinct identities, or simply misinterpreting the degree of integration in a conurbation.

Major industrial zones often require significant water supply for various processes like cooling, manufacturing, and waste disposal. Locating near abundant water sources (rivers, coasts) reduces operational costs and ensures a steady supply, making it a primary factor for the establishment of many industries. This is evident in Nigeria where many industrial hubs are near major water bodies.

Common mistake: Students might incorrectly choose 'the presence of cash crops' (D) because Nigeria is an agricultural country, but while cash crops attract agro-allied industries, water resources are a more universal and fundamental requirement for the origin of a wider range of major industrial zones.

The question describes how cold ocean currents affect the temperature of onshore winds, leading to reduced temperatures in adjacent coastlands. This phenomenon directly relates to the elements of weather (temperature, wind) and how they are influenced by geographical factors like ocean currents, which is a core concept in the study of weather and climate. Cold currents cool the air above them, and when this air moves inland, it lowers coastal temperatures.

Common mistake: Students might be tempted by options related to rainfall or air pressure, as ocean currents also influence these, but the question specifically focuses on the reduction of 'temperatures'.

On December 22nd, the sun's most direct rays are received at the Tropic of Capricorn, which is in the Southern Hemisphere. At this time, the Northern Hemisphere is tilted furthest away from the sun, resulting in its shortest day and longest night, which is known as the winter solstice. This astronomical event marks the beginning of winter in the Northern Hemisphere.

Common mistake: Students often confuse the seasons between the Northern and Southern Hemispheres, leading them to incorrectly choose 'summer solstice' (D) which would be true for the Southern Hemisphere at this time.

Coal is a fossil fuel formed from the remains of ancient plants that have been buried and subjected to heat and pressure over millions of years. This process of formation from organic matter classifies it as an organically-formed sedimentary rock. Sedimentary rocks are formed from the accumulation or deposition of mineral or organic particles at the Earth's surface.

Common mistake: Students might incorrectly choose mechanically-formed sedimentary rocks, not understanding that coal's origin is biological, not from eroded rock fragments.

The question describes a specific type of landform: a large, low, level area of land formed by the uplift of the sea floor bordering a continent. This definition perfectly matches that of a coastal plain. The formation process involves geological uplift, which is related to tectonic forces, and the result is a major landform.

Common mistake: Students might mistakenly choose 'a deltaic plain' because it is also a low-lying area near the sea, but a deltaic plain is specifically formed by river deposition, not the uplift of the sea floor.

The correct option is B because cities are typically centers of economic activity, offering more diverse and numerous job opportunities compared to rural areas. People migrate from rural areas to cities primarily in search of better employment and improved economic prospects. This movement significantly impacts population distribution.

Common mistake: Students might be tempted by C (recreational facilities), but while cities offer more amenities, the most significant factor driving large-scale rural-urban migration is almost always economic, specifically the search for jobs.