JAMB UTME - Geography - 2019

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One way to overcome the problem of irregular levels of water in river transport is by building locks and canals. Locks are structures that allow boats and ships to pass from one water level to another. They work by closing and filling with water, which raises or lowers the water level inside the lock to match the water level on the other side. This allows boats and ships to safely navigate through areas where the water level is different. Canals, on the other hand, are man-made waterways that are built to connect two waterways or to bypass a stretch of river with difficult navigational conditions. By providing a controlled and stable water environment, locks and canals can greatly improve the reliability and efficiency of river transport.

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The Udi hills can be considered as a good example of a cuesta landscape in Nigeria. A cuesta is a type of landform that is formed from the erosion of layered rocks. It is characterized by a gentle slope on one side and a steep slope on the other side. The Udi hills have this characteristic and are composed of sandstone and shale, which have been tilted and eroded over time, forming the cuesta landscape. This area is also known for its scenic beauty and rich cultural heritage, making it an interesting place to visit.

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A cirque is an example of a landform produced by glaciation. A cirque is a bowl-shaped depression on a mountainside with steep walls formed by glacial erosion. As a glacier moves down a mountain, it erodes the bedrock through a combination of abrasion and plucking. Abrasion occurs when the glacier grinds against the bedrock and wears it away, while plucking occurs when the glacier freezes onto the bedrock and pulls it away as the glacier moves downhill. Over time, this erosion can form a deep, steep-sided hollow or cirque on the mountainside. Cirques are often the starting point for the formation of other glacial landforms, such as u-shaped valleys and horn peaks. As a glacier continues to erode the mountainside, it can deepen and widen the cirque, creating a u-shaped valley. If multiple glaciers erode back-to-back cirques on a single mountain, it can leave behind a horn peak or a jagged, triangular peak at the mountain summit. Overall, cirques are a classic example of a landform produced by the slow, powerful forces of glaciation.

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The merging together of a number of urban settlements will produce a conurbation. A conurbation is a region that consists of a cluster of adjacent metropolitan areas and their surrounding suburban and rural areas. It arises when multiple urban settlements grow and expand to the point where they merge and form a single continuous urban area. The resulting conurbation typically has a high population density and can span across several cities or even entire regions. Examples of well-known conurbations include the Greater London area in the UK, the Rhine-Ruhr region in Germany, and the BosWash corridor in the United States.

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To calculate the birth rate of a country, we need to divide the number of registered births by the total population of the country and then multiply by 100 to get a percentage. In this case, the number of registered births is 3,000,000, and the total population of the country is 150,000,000. So the birth rate is (3,000,000 / 150,000,000) x 100, which simplifies to 2%. Therefore, the answer is%, meaning that the birth rate of the given country is 2%.

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The pair of countries where conurbation is most highly developed is USA and England. Conurbation refers to the merging of two or more previously separate cities into a single continuous urban area. This process is most highly developed in the USA and England due to their history of urbanization and industrialization. The cities of London and New York are two of the largest conurbations in the world and serve as centers of finance, commerce, and culture. These cities have grown and expanded over time to include many surrounding suburbs, creating a vast, interconnected metropolitan area.

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The region with the least population density is the Eurasian Tundra. The tundra is a cold, barren landscape located in the northern hemisphere, spanning across parts of Alaska, Canada, Russia, and Scandinavia. This region is characterized by extremely harsh weather conditions, including long, cold winters and brief, cool summers. The soil is also poor in nutrients and unable to support much plant life, making it difficult for people and animals to survive. As a result, the population density in this region is very low and only a small number of people live there.

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A population with low birth and death rates generally presents an aging population structure, meaning there are more older people compared to younger people. This results in an inverted population pyramid, where the base is narrow at the younger ages and wider at the older ages. This occurs because people are living longer and there are fewer newborns to replace them. This population structure has implications for social and economic systems, as it may lead to increased demands for healthcare and pension systems.

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The eucalyptus tree is native to Australia and is commonly found in the Australian woodland. Similarly, the teak tree is native to the monsoon forests in Southeast Asia. Just as the eucalyptus is a defining species of the Australian woodland, the teak is a defining species of the monsoon forest.

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Zambia is a country in Africa that is well-known for its production of copper. Copper is a metal that is widely used in many industries, and Zambia is one of the largest producers of this metal in Africa. In Zambia, copper is extracted from the ground and then processed into different forms, such as wire, pipes, and other products. The mining industry is a major contributor to the economy of Zambia, and the country's copper mines help to provide jobs and support the local economy.

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The Ruhr coalfield is located in Germany. Specifically, it is located in the western part of the country, in the state of North Rhine-Westphalia. The area is known for its rich deposits of coal and was a major source of coal for Germany during the Industrial Revolution. Today, many of the mines have been closed, but the region still has a strong industrial presence and is home to many factories and businesses.

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Warm ocean currents flow from the equator to the poles. These currents carry warm water from the equator, where the water is heated by the sun, to areas closer to the poles, where the water releases heat to the atmosphere and cools down. This movement of warm water helps regulate the Earth's climate by transferring heat from the equator to other parts of the planet.

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The best technique to prevent soil erosion in a humid, gently sloping area is contour ridging. Contour ridging involves creating ridges that run along the contour lines of the slope, which helps to slow down the flow of water across the surface of the soil. This technique helps to trap water, reduce its speed, and allow it to penetrate into the soil. By reducing the speed of water, contour ridging also helps to reduce the amount of soil that is carried away by the water, which reduces erosion. Terrace cultivation and intercropping can also be effective techniques for reducing erosion, but they are generally better suited to steeper slopes. Wind breakers can help to reduce erosion caused by wind, but they are not as effective for preventing erosion caused by water. In summary, contour ridging is the best technique for preventing soil erosion in a humid, gently sloping area because it helps to slow down the flow of water and reduce erosion, and it is well-suited to this type of terrain.

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The survival of an organism in a natural ecosystem depends largely on its adaptation to prevailing conditions. This means that the organism must be able to adapt to the environment in which it lives, in order to be able to survive and reproduce. This includes factors such as the availability of food and water, the presence of predators, the climate, and other environmental factors. When an organism is able to adapt to its environment, it is better able to compete with other organisms and increase its chances of survival.

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Soil texture is primarily determined by the particle sizes of the mineral components in the soil. These mineral particles can range in size from large rocks to tiny clay particles. The three main particle size classes that determine soil texture are sand, silt, and clay. Sand particles are the largest, ranging in size from 0.05 to 2.0 millimeters. Silt particles are smaller, ranging from 0.002 to 0.05 millimeters. Clay particles are the smallest, less than 0.002 millimeters in size. The proportion of these particle sizes in the soil determines its texture. Soil texture is an important factor that affects many soil properties, including water-holding capacity, drainage, nutrient availability, and the ability of roots to grow. Soil texture is also used as a basis for soil classification, with different textures having different names, such as sandy loam, clay loam, and silty clay.

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Temperature is the weather element that is controlled mainly by latitude. Latitude is a measurement of how far a place is from the equator, with the equator being at 0° latitude and the poles at 90° latitude. The closer a place is to the equator, the more direct sunlight it receives, and the warmer it tends to be. The further away from the equator a place is, the less direct sunlight it receives and the cooler it tends to be. This is why the tropics are warm and the poles are cold. So, in simple terms, latitude mainly affects temperature because it determines the amount of direct sunlight a place receives, which in turn affects its overall temperature.

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The climate described, with a long wet season of up to 10 months, high annual rainfall of 3000mm, and a mean monthly temperature of at least 26°, is most likely a tropical monsoon climate (Am). Tropical monsoon climates are characterized by a distinct dry season and a long, wet season, with most of the precipitation falling during the wet season. The mean monthly temperature in this climate is high, generally above 18°C, and typically exceeds 26°C during the wet season. In contrast, tropical humid (Af) climates are characterized by a year-round high rainfall, with no distinct dry season, and mean monthly temperatures generally above 18°C. Tropical wet and dry (Aw) climates have distinct dry and wet seasons, with the dry season lasting longer than in the monsoon climate. Warm humid subtropical (Cfa) climates have hot summers and cool winters, with precipitation distributed throughout the year. These climates are found in the subtropics and have a mean temperature of at least 10°C in the coldest month.

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Nigeria has entered into trade agreements in petroleum products and gas with some West African countries. This means that Nigeria has agreed to trade its petroleum products and gas with certain countries in West Africa. The exact countries involved in the agreement may vary, but the goal is to increase trade and cooperation between Nigeria and its neighbors in West Africa.

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The most densely populated city which is also the capital of a country in Africa is Cairo, the capital city of Egypt. Cairo is not only the largest city in Egypt but also in the entire African continent, with a population of over 9 million people. It has a very high population density of about 48,000 people per square kilometer, making it one of the most densely populated cities in the world. Cairo is located in the northeastern part of Egypt, along the banks of the River Nile, and it has been the political and cultural center of Egypt for centuries. The city is home to several historical and cultural landmarks such as the Great Sphinx, the Pyramids of Giza, and the Egyptian Museum, which attracts millions of tourists every year. Cairo's population density can be attributed to several factors, including the city's history, economic opportunities, and population growth. The city has experienced significant population growth over the years, with people from rural areas moving to the city in search of employment opportunities and a better quality of life. Additionally, the city's location along the Nile River has also contributed to its high population density, as it has facilitated the growth of agriculture and trade in the region. Overall, Cairo's high population density is a reflection of the challenges faced by many rapidly growing cities in developing countries, including urbanization, lack of adequate infrastructure, and limited resources.

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The Sudd region has been highly valued for its biodiversity. Biodiversity refers to the variety of living organisms in an ecosystem, including plants, animals, and microorganisms. The Sudd is a vast wetland in South Sudan that covers approximately 30,000 square kilometers and is home to a diverse range of flora and fauna. The wetland provides habitat for many endangered and endemic species, including birds, fish, and large mammals like the African elephant. In addition to supporting a rich array of wildlife, the Sudd is also an important source of water and food for local communities who rely on its resources for their livelihoods. Therefore, protecting the biodiversity of the Sudd is crucial for both ecological and human well-being.

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The Stevenson's screen is a box used to house weather instruments that measure temperature, humidity, and other meteorological variables. It is raised about one meter above the ground to avoid the heat from the ground. When the screen is placed on the ground, it can absorb and radiate heat from the ground, which can affect the accuracy of temperature measurements. By raising it one meter above the ground, the screen is more exposed to the free atmosphere and less affected by the heat from the ground. Additionally, raising the screen helps to reduce the impact of raindrops entering the instruments during heavy rainfall. The height also helps to avoid the effects of nearby trees and other obstacles that could affect wind flow around the instruments and affect the measurements. Therefore, the main reason for raising the Stevenson's screen one meter above the ground is to ensure that the weather instruments inside are measuring the temperature and other meteorological variables accurately and without interference from external factors.

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The rocks of the basement complex are generally referred to as older granite. The basement complex is a layer of rock that forms the foundation or base of the Earth's crust. It consists of a variety of igneous and metamorphic rocks that have been deeply buried and intensely deformed over time. The older granite that makes up the basement complex is a type of igneous rock that was formed by the solidification of molten magma deep beneath the Earth's surface. It is typically composed of minerals such as quartz, feldspar, and mica, and is known for its coarse-grained texture and distinctive speckled appearance. The older granite of the basement complex is important because it serves as a stable platform for the overlying sedimentary rocks and volcanic rocks. It also plays a significant role in controlling the location and distribution of mineral deposits, as many valuable ores are associated with the older granite. Overall, the older granite of the basement complex is a fundamental component of the Earth's crust and has significant geological and economic importance.

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The prairies of North America are temperate grasslands. Temperate grasslands are areas with grass as the dominant vegetation and located in regions with moderate temperatures, not too hot or too cold. The prairies of North America are located in the central part of the continent and are characterized by their rolling hills, fertile soil, and abundant grasses. This grassland ecosystem supports a variety of wildlife, including bison, pronghorns, and coyotes, and has played a significant role in the history and culture of the United States and Canada.

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Among the options given, the most influential factor in the location of textile and footwear industries is abundant cheap labor. Textile and footwear industries require a large labor force to produce goods at a low cost. If a country has a large supply of labor willing to work for low wages, it can attract textile and footwear industries to set up factories in its territory. This is because labor is usually the largest cost for these industries, and a country with cheap labor can offer cost advantages to manufacturers. Raw materials are also important for these industries, but they can be imported from other countries if they are not available locally. Energy supply and low interest rates may also affect the cost of production, but they are less critical factors than the availability of cheap labor. In summary, countries with a large supply of cheap labor have an advantage in attracting textile and footwear industries because they can offer low production costs to manufacturers, making their products more competitive in the global market.

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The most suitable statistical diagram to show spatial distribution of production is a dot map. A dot map is a type of map that uses dots to represent the quantity or density of a particular feature across a geographic area. In the case of production data, each dot can represent a certain amount of production, and the density of the dots can show areas with high or low production levels. This allows for a clear visual representation of where production is concentrated and where it is less prominent. Pie charts, divided circles, and line graphs are not suitable for showing spatial distribution of production. A pie chart is used to show proportions of a whole, while a divided circle is similar to a pie chart but is divided into more than one category. These charts are best suited for displaying data where the whole is made up of distinct categories, rather than for geographic data. A line graph, on the other hand, is used to show trends over time, and is not well-suited for displaying spatial data.

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