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Pergunta 1 Relatório
Which of the following countries is located within the Horn of Africa?
Detalhes da Resposta
The **Horn of Africa** is a prominent peninsula in East Africa that juts into the Arabian Sea. It consists primarily of four countries: **Ethiopia**, **Eritrea**, **Somalia**, and **Djibouti**. From the options provided, only **Djibouti** is located within the Horn of Africa. This makes Djibouti geographically significant in terms of its positioning in this specific region.
For further understanding, here is a brief description of the other countries mentioned:
Pergunta 2 Relatório
Which of the following are best explains the drift of population from rural to the cities in Nigeria?
Detalhes da Resposta
The movement of population from rural areas to cities, commonly known as urbanization, is influenced by several factors, particularly economic and social opportunities. In the context of Nigeria, one of the most significant reasons is due to the availability of more job opportunities in the cities. Urban centers often offer a greater variety of employment possibilities compared to rural areas. These opportunities can be in industries, services, or various sectors requiring skilled and unskilled labor.
Economic development tends to be concentrated in cities, attracting individuals seeking better employment prospects and higher income potential. Many people move to urban areas in search of work that they cannot find in their rural hometowns, where agriculture may be the predominant source of livelihood with limited economic diversification.
Moreover, cities in Nigeria typically provide better recreational facilities and services than rural areas. These include access to modern amenities such as shopping centers, cinemas, sports facilities, and cultural events, which contribute to a higher quality of life. This aspect is appealing, particularly to younger generations, creating an added incentive for migration.
The other factors mentioned, such as food scarcity in rural areas, might contribute to migration but are often secondary compared to the employment factor. Many rural areas have agricultural activities, so food scarcity is not the primary reason; instead, it's the lack of economic opportunities that often triggers the movement.
Finally, while it is true that the cost of living in the cities is very high, especially in terms of housing and services, this is not a reason that attracts people to move. In fact, it might be a deterrent. Nonetheless, the potential for better income and lifestyle improvement in cities often outweighs the high cost of living for many migrants.
Pergunta 3 Relatório
If the local time at a place X is 12.00 noon when the G.M.T is 5.00a.m then X is located on longitude
Detalhes da Resposta
To determine the longitude of place X, we need to understand the relationship between time and longitude. The Earth is divided into 360 degrees of longitude, and it completes one full rotation (360 degrees) in 24 hours. Therefore, for every hour, the Earth rotates 15 degrees of longitude.
The given information is this:
The difference in time between GMT and the local time at place X is 7 hours (from 5:00 a.m. to 12:00 noon).
Calculation:
Now, we need to determine whether place X is east or west of the Prime Meridian (0° longitude, the reference line for GMT).
- Since the local time at place X is ahead of GMT (12:00 noon compared to 5:00 a.m.), it means X is east of the Prime Meridian.
Thus, place X is located on 105°E.
Pergunta 4 Relatório
On June 21st, when the sun is overhead at the Tropic of Cancer,places in the Northern Hemisphere experience
Detalhes da Resposta
On June 21st, the sun is overhead at the Tropic of Cancer, marking the Summer Solstice in the Northern Hemisphere. This is the point in the year when the Northern Hemisphere is tilted closest to the sun. As a result, places in the Northern Hemisphere experience their longest day and shortest night. This means that there is more daylight compared to nighttime.
To summarize, on this date, locations in the Northern Hemisphere will experience a longer day and a shorter night. This is due to the tilt of the Earth's axis, which maximizes sunlight exposure to these regions.
Pergunta 5 Relatório
Sunrise and sunset are not proofs that the Earth is spherical in shape, as they can be observed on other celestial bodies as well.
Detalhes da Resposta
Mercury and Venus are the two planets that lie between the Sun and Earth.
Pergunta 6 Relatório
Detalhes da Resposta
The nearest planet to the Sun is Mercury.
Here's a simple explanation: The Solar System consists of eight major planets, which include Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune, arranged in that order from closest to the Sun to farthest. Pluto, once considered the ninth planet, has been reclassified as a "dwarf planet" and is well beyond Neptune.
Mercury, being the closest planet to the Sun, has a very short orbit compared to other planets. It completes one orbit around the Sun in just about 88 Earth days. Because of its proximity to the Sun, Mercury experiences significant temperature variations, extremely hot during the day and very cold at night.
Pergunta 7 Relatório
Detalhes da Resposta
Quartzite, schist, and marble are all examples of metamorphic rocks.
Here's why:
Sedimentary Rocks are formed from the accumulation of sediments, while Igneous Rocks are formed from the cooling and solidification of magma or lava. Volcanic rocks are a subset of igneous rocks that specifically form from lava at the earth's surface. Thus, quartzite, schist, and marble do not fall under these categories.
Pergunta 8 Relatório
Which of the following regions in Nigeria has an average height of over 100 metres above sea level?
Detalhes da Resposta
The Biu Plateau has an average height of over 100 meters above sea level. The Biu Plateau is a region of high ground in northeastern Nigeria
Pergunta 9 Relatório
A settlement developed at the meeting point of roads is known as a
Detalhes da Resposta
A settlement developed at the meeting point of roads is known as a nodal town.
Let's break this down in a simple way:
In contrast, a port town develops around a harbor, a confluence town forms where rivers meet, and a gap town evolves in mountain pass regions. Thus, a town at the meeting point of roads is distinctly identified as a nodal town.
Pergunta 10 Relatório
When wet and dry bulb thermometers record the same temperature, it means
Detalhes da Resposta
When wet and dry bulb thermometers, which together form a psychrometer, record the same temperature, it indicates that the air is saturated. This means that the air has reached its maximum capacity to hold water vapor, also known as reaching the dew point.
Normally, the wet bulb thermometer, which has a cloth soaked in water wrapped around it, shows a lower temperature than the dry bulb thermometer because evaporation cools it down. However, when the temperatures are the same for both thermometers, no evaporation is taking place. This is because the air cannot accept more water vapor, pointing to a humidity level of 100%, which is known as saturation.
Pergunta 11 Relatório
All the major industrial zones of Nigeria owe their origin mainly to
Detalhes da Resposta
The major industrial zones of Nigeria owe their origin mainly to the presence of cash crops. This is because, historically, Nigeria's economy largely depended on agriculture, and the availability of these cash crops provided a foundation for establishing industries. For example, regions where cash crops such as cocoa, palm oil, rubber, and groundnuts were abundantly grown became focal points for industries.
These crops were in high demand both locally and internationally, encouraging the establishment of processing industries to add value before export. This led to the development of infrastructure and contributed to the economic growth of these regions.
Thus, the presence of cash crops has played a significant role in shaping the industrial landscape of Nigeria by attracting investments, creating jobs, and fostering economic development in the respective regions.
Pergunta 12 Relatório
All the following are causes of mechanical weathering except
Detalhes da Resposta
Mechanical weathering is the process of breaking down rocks into smaller pieces without changing their chemical composition. There are several causes of mechanical weathering, but not all processes that affect rocks are related to mechanical weathering.
The options listed include:
Temperature changes: This is a cause of mechanical weathering. When rocks are exposed to fluctuating temperatures, they expand when it's hot and contract when it's cold. Over time, these repeated expansions and contractions can cause the rocks to crack and break apart.
Frost action: Also known as freeze-thaw weathering, this is another form of mechanical weathering. Water can seep into cracks in the rocks, and as temperatures drop, the water freezes and expands. This expansion exerts pressure on the rock, gradually breaking it apart.
Alternate wetting and drying: This causes mechanical weathering by changing the volume of clay minerals found in some rocks. When these rocks get wet, the clay swells, and when dry, it contracts. This constant expansion and contraction lead to mechanical breakdown.
Rain action: This is not primarily a cause of mechanical weathering. While rain can contribute to weathering processes, such as chemical weathering where it reacts with minerals in rocks to form new compounds, its primary role in mechanical weathering is minimal compared to other factors.
Therefore, among the options provided, rain action is the one that is not a direct cause of mechanical weathering.
Pergunta 13 Relatório
A large expanse of low, level land, formed due to an uplift of part of the sea floor bordering a continent is called
Detalhes da Resposta
A **coastal plain** is a **large expanse of low, level land** that is formed due to an **uplift of part of the sea floor bordering a continent**. Essentially, it is an area where the land is relatively flat and is located near the coast.
This type of landform often occurs due to geological activities over time where the sea floor is pushed upwards, resulting in a broad, flat land surface extending inland from the coast. Coastal plains are typically characterized by their flat terrain and proximity to the ocean, making them influenced by marine conditions.
In summary, **a coastal plain is the result of the elevation of a portion of the sea floor adjacent to the continent**. It is characterized by its flatness and location near the sea, distinguishing it from other types of plains such as deltaic, outwash, or flood plains which have different formation processes and characteristics.
Pergunta 14 Relatório
All the following are problems of mining in Africa except
Detalhes da Resposta
Mining in Africa faces several challenges, but understanding these issues helps in realizing the unique dynamics of the industry on the continent.
Inadequate Unskilled Labour: This is generally not a problem in Africa. The continent has a large population that provides sufficient unskilled labor for mining activities. Thus, an abundance of unskilled labor makes this factor not a significant issue for mining operations.
Use of Obsolete Technology: Many mining operations in Africa struggle with outdated or insufficient technology. This affects the efficiency and safety of mining activities, making it a significant challenge for the industry.
Shortage of Power: Power shortages are common in many African countries and can severely impact mining operations, which require consistent and significant energy for their activities. This is a critical challenge in mining across the continent.
Inadequate Foreign Capital: Many African nations experience difficulty in attracting sufficient foreign capital to invest in modernizing and expanding their mining sectors. This capital is crucial for technology upgrades and infrastructural development in the industry.
In summary, inadequate unskilled labour is not typically a problem for mining in Africa, whereas the other issues listed are significant challenges impacting the industry.
Pergunta 15 Relatório
The equatorial diameter of the earth is approximately
Detalhes da Resposta
The equatorial diameter of the earth is approximately 6,760 km. This is the distance from the equator to the equator, passing through the center of the earth.
Pergunta 16 Relatório
Which of the following is an effect of rural-urban migration on the source region?
Rural unemployment
Detalhes da Resposta
Rural-urban migration refers to the movement of people from rural areas to urban areas in search of better opportunities and living conditions. One of the main effects of this kind of migration is rural depopulation.
Here's why:
In summary, rural depopulation is one of the primary effects of rural-urban migration as it results in a decrease in the population of the rural areas being vacated.
Pergunta 17 Relatório
Mountains formed as a result of compressional forces in the earth's crust are
Detalhes da Resposta
The mountains formed as a result of compressional forces in the Earth's crust are known as fold mountains. Fold mountains are created when two tectonic plates collide, and the compressional forces involved cause the layers of the Earth's crust to crumple and fold.
Imagine it like pushing two pieces of paper together from opposite ends; they begin to crumple and form folds. Similarly, when large sections of the Earth's crust are subjected to immense pressures from the sides, they buckle and bend into wave-like structures called folds. These folds then rise over time to form fold mountains.
Some of the most well-known mountain ranges in the world, like the Himalayas, the Alps, and the Rockies, are examples of fold mountains.
In summary, fold mountains are formed by the compression and folding of the Earth's crust, making them a direct result of tectonic forces that push the land upwards to form mountains.
Pergunta 18 Relatório
All the following are advantages of the bush fallowing system in West Africa except that it
Detalhes da Resposta
The bush fallowing system in West Africa is not very economical in the use of land. Bush fallowing involves leaving land fallow for several years to regain its fertility, which can lead to inefficient use of land.
Pergunta 19 Relatório
Which of the following climatic types is found on the western margins of continents between altitude 300 and 400 North and South of the Equator?
Detalhes da Resposta
The climatic type found on the western margins of continents between latitudes 30° and 40° North and South of the Equator is the Mediterranean climate.
The Mediterranean climate is characterized by its unique seasonal weather pattern:
This type of climate is well-known for supporting specific kinds of ecosystems and is suitable for growing certain crops, such as olives, grapes, and wheat. Typical regions with a Mediterranean climate include the coastal areas of the Mediterranean Sea, parts of California in the United States, central Chile, the southern tip of South Africa, and southwestern Australia.
Pergunta 20 Relatório
Which of the following is not an element of climate?
Detalhes da Resposta
To determine which of the listed items is not an element of climate, we need to understand what elements constitute climate. **Climate** refers to the average weather conditions of a place over a long period, typically 30 years or more. The primary elements that define climate include **temperature**, **precipitation**, **humidity**, **wind**, and **air pressure**. Let's go through the choices given:
Precipitation: This is an important element of climate as it refers to any form of moisture that falls from the atmosphere to the earth's surface, such as rain, snow, or sleet.
Air pressure: This is a crucial element of climate because it influences wind patterns and weather systems such as cyclones and anticyclones.
Altitude: This is not an element of climate; rather, it is a geographic factor that influences climate. As you go higher in altitude, temperatures typically decrease, which can affect the climate of a region, but altitude itself is not a climatic element.
Temperature: This is a fundamental element of climate, affecting the average warmth or coldness of a place over time.
Therefore, **altitude** is not an element of climate, but a factor that can influence the other elements like **temperature** and **precipitation**.
Pergunta 21 Relatório
Which of the following geographical regions of Nigeria covers one-fifth of the country and has a generally flat surface dotted with granitic hills? The
Detalhes da Resposta
The geographical region of Nigeria described in the question is the North-Central Highlands. This area covers about one-fifth of the country and is characterized by a generally flat surface with granitic hills, known as inselbergs, scattered throughout the landscape. These hills are composed of hard rock formations that have resisted erosion, thereby standing out from the flatter surroundings.
This region is situated in the north-central part of Nigeria and is significant for its geological features and agricultural potential. The flat terrain provides an expansive area suitable for farming, while the inselbergs add to the region's natural beauty and sometimes serve as landmarks. The North-Central Highlands are an important and distinct geographical region within Nigeria due to these unique characteristics.
Pergunta 22 Relatório
Which of the following is not true of pie chart?
Detalhes da Resposta
Pie charts are not suitable for representing data with wide extremes, as they are better suited for showing proportions and percentages.
Pergunta 23 Relatório
Detalhes da Resposta
The term over-population is best defined as the situation where the population exceeds available resources. This means that the number of people in an area is greater than the resources available to sustain them, such as food, water, shelter, and health care. It can lead to various problems including poverty, environmental degradation, and a strain on infrastructure. Over-population occurs when the existing resources cannot meet the needs of the people, resulting in hardship and reduced quality of life.
In contrast, having a birth rate equal to the death rate implies a stable population over time, not necessarily over-population. Increasing birth rate and decreasing infant mortality can contribute to population growth, but they do not solely define over-population. Finally, high population density refers to a large number of people living in a small area, which could lead to over-population if resources are insufficient, but high density alone does not equate to over-population.
Pergunta 24 Relatório
Africa's largest timber producer is
Detalhes da Resposta
In terms of the largest timber producers in Africa, it is important to understand which nation has significant timber resources and an established forestry industry. Zaire, known today as the Democratic Republic of Congo (DRC), is recognized as the largest timber producer in Africa.
The Democratic Republic of Congo has extensive forest coverage, including parts of the Congo Basin, which is the second-largest rainforest in the world after the Amazon. This vast expanse of forestland provides an abundance of timber resources. The country's forestry industry has developed around this natural resource, contributing significantly to its economy.
Other countries like Ghana and Nigeria also have substantial forests and timber industries, but they do not match the scale of Zaire. Malawi, on the other hand, is less known for timber production compared to these countries.
In summary, considering its massive forest expanse and established timber industry, Zaire (the Democratic Republic of Congo) stands out as Africa's largest timber producer.
Pergunta 25 Relatório
The ocean that connects Europe and America is the
Detalhes da Resposta
The ocean that connects Europe and America is the Atlantic Ocean.
Here's a simple explanation: The Atlantic Ocean is a massive body of water that lies between the continents of Europe and Africa to the east and the Americas to the west. This ocean is one of the world's five major oceans and is the second largest after the Pacific Ocean. Historically, the Atlantic Ocean has been significantly important as a route for ships traveling between Europe and the Americas, playing a crucial role in exploration, commerce, and cultural exchanges.
Pergunta 26 Relatório
The outer layer of the earth is called the
Detalhes da Resposta
The outer layer of the Earth is called the crust. Let's understand this in simple terms:
The Earth is made up of several layers. Imagine the Earth like an onion with different layers, with each layer varying in composition and physical properties. The outermost of these layers is the crust.
The crust is similar to a thin shell around the Earth. It is very thin compared to the other layers and can be thought of as the Earth's skin. It is made up of solid rocks and minerals and is where we live and see landscapes, mountains, and oceans.
Below the crust is the mantle, which is much thicker and composed primarily of semi-solid rock. Therefore, when talking about the outermost layer, we refer specifically to the Earth's crust.
Pergunta 27 Relatório
All the following are members of the ECOWAS except
Detalhes da Resposta
The Economic Community of West African States (ECOWAS) is a regional political and economic union of countries located in West Africa. Its objective is to promote economic integration across the region. The official member states of ECOWAS include countries in West Africa.
Among the options provided:
Cameroun, however, is not a member of ECOWAS. While it is geographically close to West Africa, it is primarily considered part of Central Africa, and it is a member of the Central African community organization instead.
Pergunta 28 Relatório
The solar system comprises the sun and
Detalhes da Resposta
The solar system is a vast and fascinating system that centers around the Sun, a star that provides light and heat to all the celestial bodies that revolve around it. Understanding what other components make up the solar system is essential for grasping how our cosmic neighborhood operates.
There are eight major planets that orbit around the Sun. These planets, in their order from the closest to the farthest from the Sun, are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Each of these planets varies in size, composition, and distance from the Sun, but they all follow elliptical orbits.
In addition to the eight recognized planets, there are also dwarf planets, such as Pluto. Pluto was previously considered the ninth planet until it was reclassified as a dwarf planet by the International Astronomical Union in 2006 due to updated criteria that define what constitutes a planet.
Besides planets and dwarf planets, the solar system also contains a variety of other celestial bodies. These include moons, which are natural satellites that orbit planets; asteroids, which are small rocky bodies primarily located in the asteroid belt between Mars and Jupiter; and comets, which are icy bodies that have eccentric orbits bringing them close to the Sun occasionally.
In summary, the solar system comprises the Sun and eight planets, alongside other celestial bodies such as dwarf planets, moons, asteroids, and comets. Understanding the composition of the solar system helps us appreciate the complexity and grandeur of our cosmic environment.
Pergunta 29 Relatório
Rocks which have been formed by the cooling and solidification of molten magma are called
Detalhes da Resposta
Rocks that are formed from the cooling and solidification of molten magma are called igneous rocks.
To put it simply, when rocks melt deep beneath the Earth's surface because of the high temperatures, they turn into a liquid called magma. This magma can sometimes rise to the surface in the form of lava. Once either the magma or lava cools down and becomes solid, it forms a new type of rock known as igneous rock.
These rocks can be formed inside the Earth when the magma cools slowly, creating large crystals, or on the Earth's surface, when the lava cools quickly, often resulting in smaller crystals. The word "igneous" comes from a Latin word meaning "fire," which appropriately describes how these rocks form from the hot, molten magma.
Pergunta 30 Relatório
Which of the following best explains why wind action is more predominant in Arid regions than in Humid regions?
Detalhes da Resposta
Wind action is more predominant in arid regions due to the combination of loose surface materials and the absence of vegetation cover. In these regions, there is little moisture to bind soil particles together, making them easily detachable and transportable by wind. Without vegetation to stabilize the soil and buffer wind, these loose particles are swept away, leading to significant wind erosion.
Other reasons, such as insufficient drainage or strong winds, also play a role; however, the **primary** factors are the loose surface materials and lack of vegetation, allowing wind to act with greater intensity. In contrast, humid regions have ample vegetation and soil moisture, which significantly reduce the wind's ability to erode and transport surface material.
Pergunta 31 Relatório
Which of the following environmental hazards is due primarily to human activities?
Detalhes da Resposta
The environmental hazard that is due primarily to human activities is ozone depletion.
The ozone layer is a protective shield in the Earth's stratosphere that absorbs most of the Sun's harmful ultraviolet radiation. The thinning of the ozone layer is mainly caused by the release of man-made chemicals. The most significant contributors to this environmental hazard are chlorofluorocarbons (CFCs) and other ozone-depleting substances (ODS) which have been used in refrigeration, air conditioning, foam production, and aerosol propellants. When these chemicals reach the stratosphere, they break down ozone molecules, leading to what is known as the "ozone hole."
In contrast, the other environmental hazards listed—hurricanes, earthquakes, and volcanic eruptions—are natural phenomena. While human activities can influence the severity or impact of these events, such as through climate change exacerbating the intensity of hurricanes or human settlement in earthquake-prone areas, they are not primarily caused by human actions.
Pergunta 32 Relatório
A conurbation is a settlement
Detalhes da Resposta
A conurbation is a large urban area where several towns or cities have grown and merged together over a significant geographical area. This results in a continuous urban environment that functions as a single economic, social, and administrative unit. It is characterized by not only the physical merging but also the economic and social integration of these urban areas. Importantly, while these towns join together, they often retain their individual identities to some extent, but collectively they function as a larger urban zone.
Hence, the most accurate explanation is that a conurbation is a settlement where a large number of towns join together over a considerable area. This results in significant density and sometimes shared infrastructure and services. It is not merely about the number of people, nor does it focus primarily on an agricultural economy (such as predominantly farmers). Likewise, even though two or more towns combine, the emphasis is on the large-scale joining and integration process across numerous towns, rather than solely retaining distinct identities.
Pergunta 33 Relatório
Which of the following rock types is coal associated with?
Detalhes da Resposta
Coal is associated with organically-formed sedimentary rocks.
To understand why coal is associated with this type of rock, let's break it down:
1. **Sedimentary Rocks:** These rocks are formed from particles or sediments that accumulate and consolidate over time. Sedimentary rocks can be broken down further into different types based on their origins.
2. **Organically-formed Sedimentary Rocks:** This subgroup specifically forms from the accumulation of organic material, including plants and animals. Over millions of years, the remains of plants (especially those from swampy or wetland areas) accumulate in layers. As more and more layers build up, the pressure and heat from above cause these plant materials to transform into coal. Thus, coal is formed over long geological periods, through the compression of organic plant material.
This process differentiates organically-formed sedimentary rocks from mechanically-formed sedimentary rocks, which result from the mechanical process of weathering and erosion of existing rocks, and from igneous rocks like plutonic, which form from the solidification of magma, and crystalline rocks, which are typically associated with metamorphic processes. Thus, **coal is uniquely tied to organically-formed sedimentary rocks because of its plant-based origin**.
Pergunta 34 Relatório
Which of the following is not a sea route?
Detalhes da Resposta
The route that is not a sea route is the one involving London, Moscow, and Baghdad.
Here's the explanation:
This is why the route from London, Moscow, and Baghdad is not a sea route.
Pergunta 35 Relatório
Which of the following best accounts for the decline in the importance of rail transport in Africa?
Detalhes da Resposta
The decline in the importance of rail transport in Africa can be best explained by the high competition from road transport. Here's why:
Accessibility and Flexibility: Road transport is generally more accessible and flexible compared to railways. Roads are available in most areas of Africa, including rural regions, allowing goods and passengers to reach their destinations directly without requiring transfer between modes of transport.
Cost-Effectiveness: In many cases, road transport can be more cost-effective because it eliminates the need for transferring goods at several points. The initial investment in road infrastructure and vehicles can also be less than maintaining or upgrading railway networks.
Adaptability to Infrastructure Limitations: Many railways in Africa suffer from outdated infrastructure, which can hinder their efficiency and reliability. On the other hand, road transport can easily adapt to newer roads and infrastructures as they are developed.
Length of Transport Routes: Although Africa is a vast continent, many trade routes within countries or regions are more economically feasible with road transport, especially for short to medium distances.
Overall, while other factors such as the low volume of goods and potential retrenchment threats exist, the dominance and rapid improvement in the road transport sector particularly highlight why rail transport has seen a decline in relevance. The flexibility and economic viability of road transport often make it a more attractive choice for businesses and individuals alike.
Pergunta 36 Relatório
'It is a port that specializes in receiving and redistributing goods to the neighboring countries'. Which of the following ports is described in the preceding statement?
Detalhes da Resposta
The port described in the statement is an entrepôt. An entrepôt is a type of port or a trading post where goods are imported, stored, and then re-exported. It acts as a key transfer point in international trade, allowing products to be redistributed to neighboring countries. This concept operates on the idea that items arrive in bulk and then are sent out again, perhaps even modified or repackaged, often without the goods being subject to customs duties. In essence, an entrepôt streamlines the movement of goods, facilitating international commerce and boosting trade networks.
Pergunta 37 Relatório
Copper is an important raw material in the
Detalhes da Resposta
Copper is an important raw material in the electrical industry. This is because copper is an excellent conductor of electricity, which means it allows electrical current to flow through it easily with minimal resistance. This property makes copper ideal for use in electrical wiring, motors, transformers, and other electrical components. Additionally, copper is highly durable, resistant to corrosion, and versatile, which further enhances its usefulness in electrical applications. The electrical industry relies heavily on copper to ensure reliable and efficient power transmission.
Pergunta 38 Relatório
The innermost section of the Earth is the
Detalhes da Resposta
The innermost section of the Earth is the core. The Earth is composed of several layers, starting from the surface and moving inward. These layers, from the outside to the inside, are the crust, mantle, outer core, and inner core.
1. Crust: This is the outermost layer of the Earth. It is very thin compared to the other layers and is where we live. The crust is made up of solid rocks and minerals.
2. Mantle: Located beneath the crust, the mantle is composed of semi-solid rock that flows slowly. It is the largest layer of the Earth by volume.
3. Core: The core itself is divided into two parts: the outer core and the inner core. The outer core is made of molten, liquid metal, while the inner core is made of solid metal, primarily iron and nickel. The core is the hottest section of the Earth, with extremely high temperatures and pressures. It is situated at the center of the Earth and provides heat that helps power the movement of tectonic plates and causes volcanic activity.
Therefore, when we refer to the innermost section of the Earth, we are specifically talking about the core, and more accurately, the inner core.
Pergunta 39 Relatório
Which activity requires the following? I. Large area of land usually in thousands of hectares II. Availability of water either in the form of rain or irrigation III. High capital outlay
Detalhes da Resposta
The activity that requires a large area of land usually in thousands of hectares, availability of water either in the form of rain or irrigation, and a high capital outlay is plantation agriculture. Let me explain why:
Large Area of Land: Plantation agriculture involves the cultivation of crops on a very large scale, often requiring thousands of hectares. This is necessary to achieve economies of scale and produce significant quantities of a specific crop such as tea, coffee, sugarcane, rubber, or oil palm.
Availability of Water: Crops grown on plantations need adequate water supply to thrive. This can be provided by regular rainfall or through irrigation systems. Thus, plantations are often located in regions with favorable climatic conditions or equipped with efficient water management systems.
High Capital Outlay: Establishing a plantation requires a significant initial investment. This includes procuring land and machinery, setting up irrigation systems, and maintaining infrastructure. Furthermore, plantations often rely on the employment of many workers and the use of advanced agricultural techniques, which also contribute to the high cost.
In contrast, the other activities mentioned do not primarily rely on these three factors to the same extent. For example, lumbering involves harvesting trees, which may also require substantial land area, but does not necessarily need irrigation. Tourism industry might require watering systems for landscaping, but its focus is more on site attractions. Finally, while mining requires high capital outlay and can cover large areas of land, it does not depend on the availability of irrigation systems like plantation agriculture does.
Pergunta 40 Relatório
The world's busiest shipping routes are on the
Detalhes da Resposta
The world's busiest shipping routes are found on the Atlantic Ocean. This ocean plays a crucial role in global trade and transportation due to several factors:
While other oceans like the Pacific and Indian Oceans are also important for global trade, the Atlantic Ocean remains particularly significant due to its connectivity and the economic powerhouses it links. The Antarctic Circle is not a major route due to its harsh environmental conditions and minimal human inhabitation, which reduces commercial sea traffic in that region.
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