A carregar...
|
Pressione e Mantenha para Arrastar |
|||
|
Clique aqui para fechar |
|||
Pergunta 1 Relatório
Which of the following is the most important weathering process in Karst regions?
Detalhes da Resposta
The most important weathering process in Karst regions is carbonation. Karst regions are areas that are characterized by soluble rocks such as limestone, dolomite, and gypsum. Carbonation occurs when carbon dioxide in the atmosphere dissolves in rainwater, forming carbonic acid. This carbonic acid reacts with the soluble rocks, causing them to dissolve and form sinkholes, caves, and other distinctive landforms commonly found in Karst regions. Hydrolysis is the chemical breakdown of minerals by water, oxidation involves the combination of minerals with oxygen, and hydration is the process of minerals absorbing water molecules. While these processes can contribute to weathering in Karst regions, carbonation is considered to be the most important process due to the prevalence of soluble rocks in these areas.
Pergunta 2 Relatório
Through what process are rift valleys formed?
Detalhes da Resposta
Rift valleys are formed through the process of faulting. Faulting occurs when there is tensional stress in the Earth's crust, causing it to crack and split apart. The split forms two separate blocks of crust, with one side moving downwards and the other side moving upwards, creating a steep-sided valley in between. This process is often associated with the movement of tectonic plates, where the plates move apart and create a rift zone in the Earth's crust. Over time, erosion and other geological processes may modify the shape of the rift valley, but the initial formation is due to faulting.
Pergunta 3 Relatório
What is the name of the local wind that blows in West Africa between November and February?
Detalhes da Resposta
The local wind that blows in West Africa between November and February is called the Harmattan. Harmattan is a dry and dusty northeasterly trade wind that blows from the Sahara Desert across West Africa towards the Gulf of Guinea. The wind is usually cold and can cause the temperature to drop significantly. It also carries a lot of dust and sand, which can reduce visibility and cause respiratory problems for people and animals. The Harmattan wind is an important weather phenomenon in West Africa, and its arrival is often eagerly anticipated for its cooling effect on the region.
Pergunta 4 Relatório
Which of the following climatic types has the smallest annual range of temperature?
Detalhes da Resposta
Pergunta 5 Relatório
Through which of the following sea routes is crude oil from West Africa transported to European markets?
Detalhes da Resposta
Pergunta 6 Relatório
Which of the following is the most important agent of erosion in humid regions?
Detalhes da Resposta
Pergunta 7 Relatório
The process by which rocks are disintegrated by physical and chemical means in situ is known as
Detalhes da Resposta
The correct answer is "weathering." Weathering is the process by which rocks are broken down and disintegrated into smaller pieces due to physical and chemical means in their original location or "in situ." Physical weathering includes the breakdown of rocks through mechanical forces such as temperature changes, wind, water, and plant roots. Chemical weathering, on the other hand, involves chemical reactions that alter the chemical composition of the rocks. Together, these processes contribute to the continuous breakdown of rocks, eventually leading to the formation of soil.
Pergunta 8 Relatório
The number of persons per square kilometer of land is called
Detalhes da Resposta
Population density is the number of individuals in a particular area, usually expressed as the number of persons per square kilometer of land. It is a measure of the concentration of people living in a given area and helps to provide insight into how crowded or sparsely populated a region is. A high population density suggests that there are many people living in a relatively small area, while a low population density indicates that the area has fewer people living in it.
Pergunta 9 Relatório
Hail, fog, dew and frost are all forms of
Detalhes da Resposta
Hail, fog, dew, and frost are all forms of precipitation. Precipitation is any form of water that falls from the atmosphere and reaches the ground. This includes rain, snow, sleet, hail, dew, and frost. Hail is formed when frozen water droplets are lifted by strong updrafts in thunderstorms, while fog is formed when water vapor in the air condenses close to the ground. Dew forms when moisture condenses on cool surfaces, and frost forms when the temperature drops below freezing and water vapor in the air freezes directly onto surfaces.
Pergunta 10 Relatório
Which of the following planets is the farthest from the sun in the solar system?
Detalhes da Resposta
Pergunta 11 Relatório
The horizontal displacement of blocks of the earth's crust along a fault plane is called
Detalhes da Resposta
Pergunta 12 Relatório
The section of the external structure of the earth's that supports life is the
Detalhes da Resposta
The section of the external structure of the earth that supports life is the biosphere. It is the part of the earth where living organisms exist. It includes all living things and the areas of the earth where they exist, such as the air, water, and land. The biosphere is the only place where life is known to exist, and it is a relatively thin layer on the earth's surface, extending from about 6 km below the ocean surface to about 10 km above it.
Pergunta 13 Relatório
What factor accounts for the slow rate of industrial development in Tropical Africa?
Detalhes da Resposta
One of the factors that account for the slow rate of industrial development in Tropical Africa is the inadequate capital. Capital is the money and resources needed to start and sustain a business, and without it, industrial development cannot happen at a significant pace. Inadequate capital can prevent businesses from investing in modern equipment and technology, hiring skilled labor, and expanding their operations. Furthermore, inadequate capital can also prevent businesses from accessing the resources they need to grow, such as loans and investment capital. Thus, without adequate capital, the growth and development of industries in Tropical Africa can be significantly hindered.
Pergunta 14 Relatório
Which of the following modes of transportation provides door-to-door services?
Detalhes da Resposta
Road transport provides door-to-door services. This is because road transport can reach almost any location, including remote areas and neighborhoods, and can deliver goods or people directly to their final destination. On the other hand, rail transport, ocean transport, and air transport typically require additional modes of transportation, such as trucks or buses, to reach their final destination. Therefore, among the given options, road transport is the only mode that provides door-to-door services.
Pergunta 15 Relatório
The shallow part of the sea adjoining the coast is called
Detalhes da Resposta
Pergunta 16 Relatório
Which of the is the first stage in the process of lumbering?
Detalhes da Resposta
The first stage in the process of lumbering is the identification of suitable species of trees. This involves the selection of trees that have the desired characteristics such as straight trunks, appropriate diameter and height, and wood quality. It is important to identify the right species of trees to ensure that the lumber produced is of high quality and meets the needs of the market. Once the suitable species of trees are identified, the process of felling the trees can begin.
Pergunta 17 Relatório
Which of the following mass wasting process results in curved tree trunks and leaning telegraphy poles?
Detalhes da Resposta
Pergunta 18 Relatório
Which of the criteria is not important in distinguishing between a village and a town?
Detalhes da Resposta
Pergunta 19 Relatório
What method of mining is used for extracting petroleum in Africa?
Detalhes da Resposta
Petroleum, also known as crude oil, is extracted from the earth's surface through a method called drilling. This method involves drilling deep wells into the earth's surface to reach the layer of rock that contains the oil reserves. Once the well reaches the oil reservoir, the oil is pumped out using various techniques, such as pressure or suction. Drilling is the primary method used for extracting petroleum in Africa, as it is in most other regions of the world where oil reserves are found. Other methods such as crushing, adit, or open cast are not suitable for extracting petroleum as it is usually located deep underground and requires specialized equipment and techniques to extract it.
Pergunta 20 Relatório
'' The climate is constantly warm, rainfall is relatively abundant with double maxima, there is no month without rain'' These are the characteristics of the
Detalhes da Resposta
The characteristics described suggest an Equatorial climate. In this type of climate, temperatures are generally high throughout the year, and rainfall is abundant and evenly distributed throughout the year. The double maxima in rainfall refer to two periods of the year when rainfall is particularly high. In contrast, the other climate types listed have different characteristics. A Monsoon climate is characterized by distinct wet and dry seasons, with high rainfall during the wet season. A Warm Temperate climate has mild winters and warm summers with rainfall distributed throughout the year. A Mediterranean climate has mild, wet winters and hot, dry summers.
Pergunta 21 Relatório
The release of harmful substances into the environment is called
Detalhes da Resposta
The correct answer is "pollution". Pollution refers to the introduction of harmful substances into the environment that cause negative effects on living organisms and their surroundings. This can be caused by human activities such as industrialization, transportation, and improper waste disposal. Pollution can take different forms such as air pollution, water pollution, and soil pollution. Examples of harmful substances that cause pollution include carbon monoxide, lead, and nitrogen oxides, among others. Pollution has negative effects on the environment, human health, and the economy, and efforts are made to reduce and prevent it.
Pergunta 22 Relatório
Which of the following elements of weather and climate is matched with the wrong measuring instrument?
Detalhes da Resposta
Humidity and barometer are matched with the wrong measuring instrument. A barometer is used to measure atmospheric pressure, while humidity is measured using a hygrometer. Humidity refers to the amount of moisture present in the air, and it is usually expressed as relative humidity. A hygrometer measures the amount of water vapor in the air to calculate the relative humidity. On the other hand, a wind vane is used to measure the direction of the wind, while a thermometer is used to measure temperature. A raingauge is used to measure the amount of rainfall in a particular area. These instruments are correctly matched with their respective elements of weather and climate.
Pergunta 23 Relatório
Which of the following is a feature commonly found in the youthful stage of a river?
Detalhes da Resposta
The youthful stage of a river is characterized by its erosive activity and its attempt to establish its course. As a result, one feature commonly found in this stage is interlocking spurs. These are ridges of land that project into the river valley and are gradually eroded away as the river flows. Interlocking spurs are formed because the river is not yet powerful enough to cut through them, so it has to wind its way around them, creating a zigzag pattern.
Pergunta 24 Relatório
The name of the volcanic rock which often forms the root of fold mountains is called
Detalhes da Resposta
The name of the volcanic rock which often forms the root of fold mountains is called a "Batholith". A batholith is a large mass of intrusive igneous rock formed from cooled magma deep in the earth's crust. When the batholith pushes up towards the surface, it may encounter and cause the overlying rock layers to fold and uplift, resulting in the formation of fold mountains. Batholiths are typically made up of granite, a coarse-grained igneous rock composed mainly of feldspar, quartz, and mica.
Pergunta 25 Relatório
Which factor of industrial location explains the establishment of cement industries near areas of limestone deposit? Proximity to
Detalhes da Resposta
The factor of industrial location that explains the establishment of cement industries near areas of limestone deposit is "source of raw materials." Limestone is the primary raw material used in cement production, and it is necessary for the cement industry to be located close to limestone deposits to minimize transportation costs and ensure a consistent supply of raw materials. Therefore, proximity to the source of raw materials is a crucial factor in industrial location decisions for cement industries.
Pergunta 26 Relatório
Which of the following are examples of metamorphic rocks?
Detalhes da Resposta
Metamorphic rocks are rocks that have undergone a transformation due to heat, pressure, and/or chemical activity. Based on the given options, the examples of metamorphic rocks are gneiss and quartzite. Basalt and gabbro are examples of igneous rocks while granite and gabbro are a combination of igneous and intrusive rocks. Gneiss and basalt are a combination of metamorphic and igneous rocks.
Pergunta 27 Relatório
Which of the following towns has winter rainfall and summer drought?
Detalhes da Resposta
Pergunta 28 Relatório
Most warm ocean currents flow
Detalhes da Resposta
Most warm ocean currents flow from the Equator. This is because the equator receives more solar radiation than other regions, which leads to warming of the seawater. As a result, the seawater becomes less dense and rises to the surface. The rising warm water then flows away from the equator in the form of ocean currents. These currents carry heat from the equatorial region to other parts of the world, affecting the climate and weather patterns in those regions.
Pergunta 29 Relatório
What pollution is caused by all the following except
Detalhes da Resposta
Treated sewage, industrial waste, oil spillage, and fishing with chemicals are all sources of pollution. The question is asking which one of the options does not cause pollution. The answer is treated sewage. Treated sewage refers to the wastewater that has undergone a treatment process to remove pollutants and contaminants before being discharged into the environment. While untreated sewage can cause pollution, treated sewage is not considered a significant source of pollution as the treatment process removes most of the pollutants.
Pergunta 30 Relatório
African rivers exhibit the following characteristics except
Detalhes da Resposta
African rivers exhibit all of the following characteristics except for "that they have great depths." Most African rivers have their sources in the interior highlands and flow towards the coast or interior basins. Due to the topography of the land, many African rivers have rapids and waterfalls on their courses. African rivers also exhibit seasonal variations in water volume, with some rivers experiencing a very high volume of water during the wet season and a very low volume of water during the dry season. However, African rivers are not known for their great depths. In general, African rivers are shallow and wide, with the exception of a few deep gorges and canyons. This is partly because the rivers have a relatively low gradient and slow velocity, which limits their ability to erode the river bed and deepen the channel.
Pergunta 31 Relatório
What will be the local time in Nigeria 15oE when the time is 7.00 p.m. in town Y 30oW?
Detalhes da Resposta
To solve this problem, we need to know the time difference between the two locations. Since Nigeria is 15 degrees east of the Prime Meridian (0 degrees), and town Y is 30 degrees west of the Prime Meridian, we can calculate the time difference as follows: 15 degrees east x 4 minutes/degree = 60 minutes (or 1 hour) ahead of GMT 30 degrees west x 4 minutes/degree = 120 minutes (or 2 hours) behind GMT So, the time difference between the two locations is 3 hours (2 hours + 1 hour). If it is 7.00 p.m. in town Y (30oW), then we need to add 3 hours to get the local time in Nigeria (15oE). 7.00 p.m. + 3 hours = 10.00 p.m. Therefore, the local time in Nigeria (15oE) when the time is 7.00 p.m. in town Y (30oW) is 10.00 p.m.
Pergunta 32 Relatório
Through which of the following processes does solar energy warm the earth;s surface?
Detalhes da Resposta
Solar energy warms the Earth's surface through the process of radiation. The sun emits electromagnetic waves, including visible light, which travel through space and reach the Earth. When these waves strike the Earth's surface, they are absorbed and converted into heat energy, which warms the air and the ground. This process of heat transfer from one object to another without physical contact is known as radiation. So, the correct option is "Radiation".
Pergunta 33 Relatório
Which of the following are circular depressions formed on the bed of a river in its upper course by pebbles carried by the river?
Detalhes da Resposta
Pergunta 34 Relatório
Which of the following vegetation belts in Africa is the most extensive?
Detalhes da Resposta
The most extensive vegetation belt in Africa is the Savannah. Savannah is a grassland with scattered trees that are typically found in tropical and subtropical regions. It covers a large portion of the African continent, stretching from the west coast of Senegal and Mauritania to the east coast of Ethiopia, and from the south of the Sahara desert to the north of the Kalahari desert. The Savannah vegetation belt is extensive because it is adapted to the climate of the region. The climate in Africa is generally warm and dry, with a long dry season and a short rainy season. The Savannah biome has adapted to these conditions by developing deep roots to access water, and by being able to survive long periods without rainfall. The Savannah biome is also home to a diverse range of wildlife, including large grazing animals such as zebras and giraffes, as well as predators such as lions and cheetahs. This diversity of wildlife is due to the abundance of food that is available in the Savannah, which is in turn supported by the grasses and trees that make up the biome. Overall, the Savannah biome is the most extensive vegetation belt in Africa due to its adaptability to the climate, its ability to support a diverse range of wildlife, and its importance as a source of food and livelihood for many people in the region.
Pergunta 35 Relatório
Favourable factors for lumbering in Africa include all the following except
Detalhes da Resposta
The question is asking to identify the exception among the listed factors that are favorable for lumbering in Africa. The first three options all suggest reasons why lumbering in Africa might be favorable - high demand for tropical timber, presence of many economic trees, and high demand for fuelwood. These factors suggest that there is a market for lumber products, and that there are abundant resources available for harvesting. The last option, "inaccessible equatorial forest," is the exception. This suggests that there are challenges to accessing and harvesting lumber from the equatorial forest, which could make lumbering less favorable in these areas. Factors that could contribute to inaccessibility might include terrain, climate, or other environmental factors. Therefore, the correct answer is "inaccessible equatorial forest," as it is the only factor that does not contribute to favorable conditions for lumbering in Africa.
Pergunta 36 Relatório
Which of the following is a disadvantage of high population density?
Detalhes da Resposta
A disadvantage of high population density is unemployment. When there is a high population density, there are more people competing for limited resources, such as jobs. This leads to a high rate of unemployment, as the number of people seeking employment is higher than the available job opportunities. This can lead to poverty, social unrest, and a strain on the economy. High population density can also lead to increased pressure on social amenities, such as water supply, housing, and transportation, which can further exacerbate the problem of unemployment.
Pergunta 37 Relatório
What is the approximate distance between two places if one is located on 11oN and the other on 5oS on the same longitude?
Detalhes da Resposta
To calculate the distance between two places on the same longitude, we need to find the length of the arc of the Earth's circumference between the two latitudes. The Earth's circumference is approximately 40,000 km. Therefore, each degree of latitude represents approximately 40,000 km/360 = 111.11 km. The distance between 11°N and 5°S is equal to the sum of the distance between the equator and 11°N plus the distance between the equator and 5°S. The distance between the equator and 11°N is 11° x 111.11 km/degree = 1,222.21 km. The distance between the equator and 5°S is 5° x 111.11 km/degree = 555.55 km. Therefore, the total distance between the two places is 1,222.21 km + 555.55 km = 1,777.76 km. Therefore, the answer is closest to 1,776 km.
Pergunta 38 Relatório
(a) Explain any five physical factors that hinder the development of railway transportation in Nigeria.
(b) Highlight any five ways transportation contributes to the economic development of Nigeria.
Detalhes da Resposta
None
Pergunta 39 Relatório
(a) Highlight any three advantages of each of the following modes of transport (i) Rail (ii) Water
(b) Give four reasons why some countries in Africa have not been able to sustain their rail transport
Detalhes da Resposta
None
Pergunta 40 Relatório
TEST OF PRACTICAL KNOWLEDGE QUESTION
Write explanatory notes on flooding under the following; (a) areas of occurrence (b) Causes (c) negative effects (d) control
Pergunta 41 Relatório
(a) Explain any five factors that are responsible for the population distribution in West Africa.
(b) Outline any five advantages of low population density in some parts of West Africa.
Detalhes da Resposta
None
Pergunta 42 Relatório
(a) Define international track
(b) Describe any five benefits of international trade
(c) What four factors limit trade between African countries and the United States of America (USA)?
Pergunta 43 Relatório
TEST OF PRACTICAL KNOWLEDGE QUESTION
(a) Define the term weathering
(b) Describe four processes of chemical weathering
Pergunta 44 Relatório
(a) Outline four functions of an urban centre.
(b) Highlight four problems of urbanization
(c) Suggest possible solutions to any two of the problems identified in (b) above
Detalhes da Resposta
None
Pergunta 45 Relatório
(a) Draw an outline map of Africa. On the map, show and name:
(i) Any three rivers important for generating electricity; (ii) Any two dams on two of the rivers.
(b) Outline any five benefits of hydroelectric power to the people of Africa.
Detalhes da Resposta
None
Pergunta 46 Relatório
TEST OF PRACTICAL KNOWLEDGE QUESTION
(a) List any two types of delta
(b) Explain four conditions favorable for the formation of delta
(c) Describe three main characteristics of a delta
Detalhes da Resposta
None
Gostaria de prosseguir com esta ação?