JAMB UTME - Geography - 2021

Antwoorddetails

A line joining all points of equal salinity is an isohaline. In simpler terms, salinity refers to the amount of salt in water, and an isohaline is a line on a map that connects all the points in a body of water that have the same level of salinity. So, if you were to take a water sample at each point along an isohaline, you would find that they all have the same amount of salt in them. Isohalines are important in oceanography and marine biology because changes in salinity can affect the behavior and distribution of marine organisms, as well as ocean currents and other physical processes.

Antwoorddetails

Nigeria's major export commodity is petroleum, also known as crude oil. Petroleum is a fossil fuel that is formed from the remains of plants and animals that died millions of years ago. It is a valuable resource that is used in a wide range of applications, including transportation, power generation, and manufacturing. In Nigeria, petroleum was discovered in the 1950s, and it has since become the country's major export commodity, accounting for a significant portion of the country's revenue. Nigeria is one of the largest oil producers in Africa and one of the top oil exporters in the world. The oil industry has had a significant impact on Nigeria's economy, providing employment opportunities and contributing to the country's economic growth. However, there have also been concerns about the environmental impact of oil exploration and the management of the revenue generated from the industry. In summary, Nigeria's major export commodity is petroleum, which is a valuable resource used in various industries. The discovery and production of oil have had a significant impact on Nigeria's economy, but there are also challenges and concerns associated with the industry.

Antwoorddetails

Geo-referencing in GIS is the process of assigning spatial locations (coordinates) to a dataset, such as an image, map, or survey data, so that it can be viewed, analyzed, and compared with other spatial datasets. The main objective of geo-referencing is to integrate datasets from different sources that have different coordinate systems, projections, and scales into a common reference framework. This enables users to overlay, compare, and analyze different spatial datasets accurately and effectively. Geo-referencing involves aligning the data to a known reference system, such as a map or satellite imagery, and assigning a spatial location to each data point. This process involves identifying control points, which are specific locations that appear in both the data and the reference system, and using them to determine the transformation that is needed to align the data with the reference system. Once the data has been geo-referenced, it can be used for data acquisition, data management, manipulation, and analysis in GIS. Geo-referenced datasets can be used for a wide range of applications, including natural resource management, urban planning, environmental monitoring, and disaster management.

Antwoorddetails

Antwoorddetails

Antwoorddetails

Antwoorddetails

Antwoorddetails

Antwoorddetails

Antwoorddetails

Antwoorddetails

One effect of the earth's revolution is that it determines a year. The earth takes approximately 365.24 days to complete one orbit around the sun, which is known as a year. As the earth moves around the sun, it also causes changes in the amount of sunlight that different parts of the planet receive, which in turn affects the seasons. The tilt of the earth's axis also plays a role in determining the seasons. As the earth moves in its orbit, different parts of the planet are tilted towards or away from the sun, which causes the variations in the amount of daylight and darkness we experience throughout the year. Therefore, while day and night, dawn and twilight, and apparent sunrise and sunset are also effects of the earth's rotation, the revolution primarily determines a year.

Antwoorddetails

The term that fits the given definition is "watershed." A watershed is a highland area that separates the headwaters of rivers that flow in different directions but originate from the same mountainous source. Think of it as a dividing line that determines which direction rainwater will flow. Rain that falls on one side of the watershed will flow into one river, while rain that falls on the other side will flow into a different river. This separation is important because it affects the water quality and quantity of each river, and it can have significant impacts on the ecosystems that depend on those rivers.

Antwoorddetails

Antwoorddetails

Monadnock of the USA is not a volcanic mountain. Volcanic mountains are formed when molten rock (magma) rises to the surface and erupts, building up layer upon layer of solidified rock and ash. Some examples of well-known volcanic mountains include Cotopaxi in Ecuador, Mount Fuji in Japan, and Mount Merapi in Sumatra. Monadnock, on the other hand, is a type of mountain called a monadnock or inselberg, which means "island mountain." These are isolated hills or mountains that rise abruptly from surrounding flat or gently sloping terrain and are often made of hard, resistant rock that has not been worn away by erosion. Monadnock is a monadnock and was formed through the uplift of a large mass of rock and the subsequent erosion of the surrounding land.

Antwoorddetails

Pastoral farming best describes the rearing of only animals like cattle, sheep, and goat mainly in the savanna belt of the north. Pastoral farming is a type of agricultural activity that involves the rearing of domesticated animals, such as cattle, sheep, and goats, in an extensive system, where the animals are allowed to roam freely over large areas of land. Pastoral farming is often practiced in regions with large areas of grassland, such as the savanna belt in the north of Nigeria, where the animals are able to find enough food and water to sustain themselves. Intensive farming, on the other hand, is a type of agricultural activity that involves the intensive use of inputs, such as land, labor, and capital, to maximize production. Intensive farming is often practiced in regions with high population densities and limited land resources. Animal farming is a general term that can refer to any type of farming that involves the rearing of animals, including both pastoral and intensive farming. Mixed farming is a type of agricultural activity that involves the simultaneous production of crops and livestock, often on the same piece of land.

Antwoorddetails

On maps, lines drawn to join all places in the ocean having equal degree of salinity are called isohalines. Isohalines are similar to contour lines on topographic maps that join all points of equal elevation. However, instead of elevation, isohalines connect all points on a map that have the same salinity in the ocean. Ocean salinity is a measure of the amount of salt dissolved in a given amount of seawater. The salinity of ocean water varies depending on several factors, such as temperature, evaporation, and precipitation. By drawing isohalines on maps, scientists can visualize the patterns of salinity distribution in the ocean and study how it changes over time. The term "isohaline" comes from the Greek word "iso" meaning equal and "haline" meaning salt, so it literally means "equal salt."

Antwoorddetails

Antwoorddetails

Antwoorddetails

A major percentage of the world's exports of citrus fruits comes from the Mediterranean region. The Mediterranean region, which includes countries such as Spain, Italy, Greece, and Turkey, has a warm and sunny climate that is ideal for growing citrus fruits such as oranges, lemons, and grapefruits. These fruits are widely cultivated in the region, and a large portion of the production is exported to other countries. This region has long been known for its fertile soils and favorable growing conditions, making it one of the major citrus-producing areas in the world. In addition, the Mediterranean region has a long history of citrus cultivation and a strong tradition of producing high-quality fruit. So, while citrus fruits can be grown in other regions such as the tropical and cool temperate regions, the Mediterranean region remains the largest exporter of these fruits.

Antwoorddetails

Antwoorddetails

Antwoorddetails

Antwoorddetails

The coastal regions of Sierra Leone record an annual rainfall of over 4,000 mm. Sierra Leone is a country located in West Africa, and its climate is generally tropical, with high temperatures and high humidity. The amount of rainfall that a place receives is determined by a number of factors, including its location and topography. The coastal regions of Sierra Leone are characterized by a dense forest and a humid climate, which is influenced by the Atlantic Ocean. The prevailing winds from the ocean bring moisture and result in high levels of rainfall. This region receives an annual rainfall of over 4,000 mm, which is one of the highest levels of rainfall in the world. The high rainfall is beneficial for agriculture, as it provides the necessary moisture for crops to grow. However, it can also result in flooding and landslides, which can be hazardous for the people living in the region. In summary, the coastal regions of Sierra Leone receive an annual rainfall of over 4,000 mm, which is a result of the region's location and its proximity to the Atlantic Ocean.

Antwoorddetails

The option that is not responsible for the concentration of industries in eastern United States of America is "inadequate capital". The concentration of industries in eastern United States is due to the availability of two important factors: a large market and abundant natural resources. The eastern region of the US has a large population that provides a ready market for industrial products. Additionally, the region has numerous natural resources such as coal, iron ore, and waterways that are necessary for industrial production. High technology can also contribute to the concentration of industries in eastern United States as it attracts skilled labor and supports innovation. However, it is not the primary factor responsible for the concentration of industries in the region. On the other hand, inadequate capital would hinder industrial growth and development. Therefore, it cannot be responsible for the concentration of industries in eastern United States.

Antwoorddetails

The option "London - Moscow - Baghdad" is not a sea route. This is a land route as it does not involve any sea transportation. The other three options are sea routes as they involve transportation by sea between the cities mentioned.

Antwoorddetails

Antwoorddetails

Algeria is located in North Africa. North Africa is a region of the African continent that includes several countries such as Algeria, Egypt, Libya, Morocco, Sudan, Tunisia, and Western Sahara. It is bordered by the Mediterranean Sea to the north, the Atlantic Ocean to the west, and the Sahara Desert to the south. Zaire, also known as the Democratic Republic of the Congo, is located in Central Africa. Rwanda is located in East Africa. Namibia is located in Southern Africa. Therefore, the correct answer is Algeria.

Antwoorddetails

Antwoorddetails

The best solution to the rapid depletion of forest resources in West Africa is to introduce forest conservation techniques. This approach involves implementing sustainable practices that protect the natural environment and enable communities to benefit from the forest resources without damaging them. It includes measures such as reducing deforestation, promoting reforestation, and enforcing laws against illegal logging and other harmful activities. Reserving hectares of land for plantations may not be a sustainable solution, as it can lead to monoculture and may not provide the same benefits as natural forests. Importing wood from other countries may exacerbate the problem, as it encourages overconsumption and does not address the underlying issues of deforestation. Employing more forest guards can help deter illegal activities, but it may not be enough without also implementing conservation techniques. Therefore, implementing forest conservation techniques is the best solution as it promotes the sustainable use of forest resources while protecting the natural environment and supporting local communities.

Antwoorddetails

A device for transferring information from an analogue map into a computer for further manipulation is called a Digitizer. A digitizer is a piece of hardware that is used to convert analogue information into a digital format that can be read and manipulated by a computer. In the case of maps, a digitizer is used to trace the features on a paper map and convert them into a digital format, such as a shapefile or a georeferenced image. This allows the information on the map to be easily manipulated, stored, and analyzed using computer software. An aerial photograph is a type of image that is taken from the air, often from an airplane or drone, and is used to capture information about the land and features on the ground. A global positioning system (GPS) is a network of satellites and receivers that is used to determine the location, speed, and direction of an object on the Earth's surface. A plotter is a type of printer that is used to produce large-format images, such as maps, technical drawings, and architectural plans.

Antwoorddetails

River regime is best described as the seasonal variation in the volume of water in a river. It refers to the pattern of the flow of water in a river over the course of a year, which is affected by changes in temperature, precipitation, and other factors. The river regime describes the variations in the discharge, or the amount of water flowing in the river, over time. This variation can be influenced by several factors, such as the amount and timing of rainfall, the amount of snowmelt, and the presence of dams or other structures that regulate the flow of the river. In some regions, rivers have a well-defined regime with distinct seasons of high and low water, while in other regions, the regime may be less predictable due to more erratic weather patterns. Understanding the river regime is important for managing water resources, predicting floods, and maintaining ecosystems that depend on the natural flow of rivers.

Antwoorddetails

Coal is the rock that is organically formed. Coal is formed from the remains of ancient plants and trees that died millions of years ago. Over time, these organic materials were buried under layers of sediment and rock, which subjected them to intense pressure and high temperatures. This process caused the organic matter to transform into coal, a black or brown rock that is primarily composed of carbon. In contrast, Gypsum, Grit, and Shale are all rocks that are formed through inorganic processes. Gypsum is formed from the evaporation of saline water, grit is a sandstone that is formed from the accumulation of sand particles, and shale is formed from the accumulation of mud and silt. In summary, coal is the only rock that is formed through organic processes, while gypsum, grit, and shale are formed through inorganic processes.

Antwoorddetails

An example of a coastline of emergence is a raised beach. A coastline of emergence refers to a type of coastline that is formed when the land is rising relative to the sea level. This can be caused by tectonic activity or changes in the level of the land due to the melting of glaciers. When the land rises, the sea level falls, which exposes the previously submerged shoreline. This results in the formation of a raised beach, which is a distinctive feature of a coastline of emergence. A raised beach is a beach that is located above the current sea level, and it is typically characterized by a flat or gently sloping surface. Other features of a coastline of emergence may include sea cliffs, wave-cut platforms, and marine terraces. These features are formed by the erosion of the land by the sea when it was at a higher level, followed by the uplift of the land. An example of a coastline of emergence can be found along the coast of Norway. The Norwegian coastline has experienced significant uplift due to tectonic activity, which has resulted in the formation of raised beaches, sea cliffs, and marine terraces. In summary, a coastline of emergence is a type of coastline that is formed when the land rises relative to the sea level. One of the distinctive features of this type of coastline is a raised beach, which is a beach that is located above the current sea level. An example of a coastline of emergence can be found along the coast of Norway.

Antwoorddetails

The type of water left in the soil after excess water has been drained off following heavy rainfall is known as field capacity. Field capacity refers to the amount of water that the soil can hold after excess water has drained away and the soil particles have become saturated. This water is held in the soil by a combination of gravity and the attraction between water molecules and soil particles. In other words, field capacity is the point at which the soil is neither too wet nor too dry, and it is the maximum amount of water that can be stored in the soil and still be available for plants to use.

Antwoorddetails

Antwoorddetails

The option that does not apply to the benefits of international trade to developing nations among those provided is "strains international trade relation". International trade has numerous benefits for developing nations, which include the following: 1. Encourages specialization in production: International trade allows developing nations to focus on producing goods and services that they have a comparative advantage in, such as natural resources or low-cost labor. This specialization leads to increased efficiency and productivity, which can result in higher economic growth and development. 2. Encourages healthy competition: International trade encourages healthy competition between nations, which drives innovation and technological advancements. Developing nations can learn from more developed nations and adopt best practices to improve their own production processes. 3. Enables nations to move from subsistence to mechanized economy: International trade provides access to capital, technology, and expertise that can help developing nations to modernize their economy and move away from subsistence farming or other traditional practices. Therefore, the correct option is that international trade does not strain international trade relations, but rather it can promote cooperation and collaboration between nations, leading to increased economic growth and development.

Antwoorddetails

Shale is a sedimentary rock. Sedimentary rocks are formed from layers of sediment, such as dead plants and animals, sand, or mud, that have been compacted and cemented together over time. Shale is a fine-grained sedimentary rock that forms from the compression of clay and silt. It is usually dark in color and can be easily split into thin layers. Marble, on the other hand, is a metamorphic rock, which means it was formed from the alteration of an existing rock, often through heat, pressure, and chemical processes. It is a dense, crystalline rock that is prized for its beauty and used in construction and sculpture. Graphite is a naturally occurring form of carbon and is not a rock. Schist is a metamorphic rock that forms from the alteration of existing rocks, often through heat, pressure, and chemical processes. It is characterized by its foliated texture, with flat, sheet-like minerals that are aligned in a particular direction.

Antwoorddetails

The vegetation zone in Nigeria that is best known for timber exploitation is the rain forest. The rain forest is a vegetation zone characterized by a dense growth of tall trees and high rainfall, which is conducive to the growth of large trees suitable for timber production. This type of vegetation is found in the southern part of Nigeria, particularly in states such as Cross River, Akwa Ibom, Rivers, and Delta. In these areas, there are many timber companies that engage in the logging and processing of timber from the rain forest. The timber industry is an important sector of the Nigerian economy, as timber is used for a variety of purposes such as construction, furniture making, and paper production. However, it is important to note that unsustainable logging practices can lead to deforestation and habitat loss, which can have negative impacts on biodiversity and the ecosystem. Therefore, it is important to ensure that logging activities are carried out in a sustainable manner, with measures taken to preserve the forest and its biodiversity for future generations.

Antwoorddetails

Kossou Dam is located on the Bandama River. The Bandama River is a major river in Ivory Coast, located in West Africa. The Kossou Dam is one of the largest dams on this river, and it is an important source of hydroelectric power for the country. The dam was built in the 1960s and is located about 60 kilometers north of the city of Yamoussoukro. The Bandama River is approximately 800 kilometers long and is the longest river entirely within Ivory Coast. It is an important source of water for irrigation and other agricultural activities, and it is also an important transportation route for goods and people. The Kossou Dam was built to harness the power of the Bandama River and generate electricity for the country. The dam has a capacity of 174 megawatts and is able to supply power to much of the country. In addition to generating electricity, the dam also helps to control flooding in the area and provides water for irrigation and other purposes. In summary, the Kossou Dam is located on the Bandama River in Ivory Coast. The Bandama River is an important source of water for irrigation and transportation, and the dam is an important source of hydroelectric power for the country.

Antwoorddetails

To determine the ground distance between the two towns on the map, we need to use the scale of the map. The scale tells us how many units of distance on the map (in this case, centimeters) correspond to one unit of ground distance (in this case, kilometers). For map a with a scale of 1:100,000, 1 centimeter on the map represents 100,000 centimeters or 1 kilometer on the ground. Therefore, 10 centimeters on the map represents 10 x 1 kilometer = 10 kilometers on the ground. For map b with a scale of 1:400,000, 1 centimeter on the map represents 400,000 centimeters or 4 kilometers on the ground. Therefore, 10 centimeters on the map represents 10 x 4 kilometers = 40 kilometers on the ground. So the correct answer is 10km, 40km.