World Geography: Some Glimpses
Short Question-Answers
Q1. What is a map projection?
Answer: A map projection is the process of showing the Earth on a flat surface.
Q2. Why is the Earth called the Blue Planet?
Answer: The Earth is called the Blue Planet because oceans cover about 71 per cent of its surface, making it appear blue from space.
Q3. Name the five oceans of the Earth.
Answer: The five oceans are the Pacific Ocean, Atlantic Ocean, Indian Ocean, Southern Ocean and Arctic Ocean.
Q4. What are ocean currents?
Answer: Ocean currents are like giant rivers flowing through the ocean. They can be warm or cold.
Q5. Why are coral reefs called the ‘rainforests of the sea’?
Answer: Coral reefs are called the ‘rainforests of the sea’ because they provide food and shelter for about one-quarter of all ocean species.
Q6. What is a continent?
Answer: A continent is a large, continuous expanse of land. The most common count is seven continents.
Q7. What makes the Tibetan Plateau unique?
Answer: The Tibetan Plateau is the highest and largest plateau on Earth. It is also called part of the ‘Third Pole’ because it contains large reserves of freshwater outside the polar regions.
Q8. What is a steppe?
Answer: A steppe is a large area of flat, unforested grassland with a temperate climate, hot summers, cold winters and moderate rainfall.
Q9. What is the largest hot desert in the world?
Answer: The Sahara Desert in Africa is the largest hot desert in the world.
Q10. Why is the Amazon River important?
Answer: The Amazon River is the longest river in South America. Its basin and tributaries support the Amazon Rainforest.
Long Question-Answers
Q1. Why do all map projections have some amount of distortion?
Answer:
The Earth is an oblate spheroid, which is nearly spherical but slightly flattened at the poles and bulging at the equator. When we try to show the Earth on a flat surface, it is impossible to do so without tearing or stretching the surface. Therefore, all map projections have some distortion. Some maps show the correct shapes of countries but incorrect sizes, while others show correct sizes but distorted shapes. We must look at multiple projections to understand the world fairly.
Q2. How do oceans help to regulate the Earth’s climate?
Answer:
Oceans cover about 71 per cent of the Earth’s surface and hold 97 per cent of its water. They help regulate the climate by absorbing heat and slowly releasing it. They also add moisture to the air, which forms clouds and rainfall. Ocean currents carry warm or cold water from one region to another and affect the climate of coastal areas. For example, the Gulf Stream makes places like the United Kingdom warmer than other places at the same latitude.
Q3. Describe the importance of the Great Barrier Reef.
Answer:
The Great Barrier Reef is located off the northeastern coast of Australia. It stretches over 2,000 kilometres and covers about 350,000 square kilometres. It contains hundreds of species of coral and thousands of species of fish and other sea animals. Coral reefs provide food and shelter to about one-quarter of all ocean species. The Great Barrier Reef is recognised as a UNESCO World Heritage Site. However, overfishing, pollution and climate change threaten its survival, making its conservation very important.
Q4. What are the different types of smaller water bodies and waterways? Explain with examples.
Answer:
The different types of smaller water bodies and waterways are seas, gulfs, bays, straits and canals.
- Sea: A large, partly enclosed saltwater area connected to an ocean. Example: Arabian Sea.
- Gulf: A large inlet of the sea that cuts deeply into the land. Example: Persian Gulf.
- Bay: A smaller, broad inlet of the sea. Example: Bay of Bengal.
- Strait: A narrow channel joining two seas or oceans. Example: Strait of Malacca.
- Canal: A man-made channel connecting water bodies. Example: Suez Canal.
These formations play an important role in trade and transport.
Q5. Describe the Tibetan Plateau and explain its importance.
Answer:
The Tibetan Plateau is the highest and largest plateau on Earth. It is located north of the Himalayan Range and was formed due to collisions between the Indo-Australian and Eurasian tectonic plates. It stretches about 2,500 kilometres from east to west and 1,000 kilometres from north to south. Its average height is over 4,500 metres above sea level.
The plateau influences the climate of Asia and is the source of major rivers such as the Indus, Brahmaputra and Yangtze. It is called part of the ‘Third Pole’ because it contains the largest reserves of freshwater outside the polar regions. Climate change and snowmelt have led to the expansion of existing lakes and the formation of new ones.
Q6. Describe the Gobi Desert and the life of people and animals in this region.
Answer:
The Gobi Desert is located in Mongolia, with part of it extending into northern China. Deserts are extremely dry areas with low precipitation. Mongolia is called the ‘Land of the Eternal Blue Sky’ because it has about eight to nine months of sunny weather. However, winter temperatures in the Gobi Desert can fall to minus 30°C.
The climate is harsh, and vegetation is sparse. Herds migrate seasonally to find pastures supported by underground water supplies. The desert demonstrates how people, animals and vegetation adapt to difficult environmental conditions.
Q7. Explain the importance of the Eurasian Steppes.
Answer:
The Eurasian Steppes are extensive grasslands that stretch for over 8,000 kilometres from west to east. They consist of large areas of flat, unforested grassland. These grasslands are important because they act as a global carbon sink by absorbing carbon from the air and storing it underground, helping reduce greenhouse effects over time.
The steppes and nearby water bodies also provide resting places for migratory birds such as the Siberian crane. The region supports grassland ecosystems and demonstrates the importance of natural landscapes in maintaining environmental balance.
Q8. Describe the Ural Mountains and explain their importance.
Answer:
The Ural Mountains are an ancient mountain range stretching about 2,500 kilometres from the Arctic Ocean in the north to the border of Kazakhstan in the south. They form a natural boundary between Europe and Asia. They have rugged slopes, caves, valleys and forests.
The Urals are rich in mineral resources, including iron ore, copper, zinc, platinum, gold, coal, oil and natural gas. They support diverse ecosystems, including coniferous forests, deciduous forests, tundra and swamps. Animals found here include brown bears, wolves, lynx, elk, reindeer and sable. These mountains are important for their ecological diversity, natural beauty and economic resources.
Q9. Describe the European Plain and explain its economic importance.
Answer:
The European Plain, also known as the Great European Plain, is one of the largest flatlands in the world. It covers parts of several countries and is characterised by low-lying land, gentle rolling hills and wide river valleys.
Its fertile soil makes it one of the world’s most productive agricultural regions. Wheat, barley, rye and potatoes are widely cultivated here. Rivers provide important routes for trade and transport. The region also has coal, oil and natural gas deposits that support economic growth. Its relatively flat land and favourable climate have helped major cities such as Moscow, Berlin, Paris, Amsterdam and Warsaw grow.
Q10. Describe the Alps and their importance to Europe.
Answer:
The Alps are a crescent-shaped mountain range in south-central Europe, stretching about 1,200 kilometres. They form a natural barrier and are famous for their beautiful landscapes, skiing and hiking opportunities. Mont Blanc is one of their famous peaks.
The Alps support different types of vegetation, including oak and beech forests at lower altitudes, spruce and pine at higher elevations, and alpine flowers such as edelweiss in the high mountains. Wildlife includes ibex, chamois, marmots, golden eagles, lynxes, wolves and brown bears.
The Alps provide water to major European rivers such as the Rhine and tributaries of the Danube. These rivers supply drinking water, irrigation and hydroelectric power to lowland Europe.
Q11. Describe the Sahara Desert and how people and animals adapt to its environment.
Answer:
The Sahara Desert is the largest hot desert in the world and is located in Africa. Temperatures range widely, and rainfall is below 25 centimetres in many parts. Vegetation is scarce, and the environment is extremely dry.
The Sahara has been home to nomadic tribes who herd sheep, goats and camels and engage in trade. Oases provide water and vegetation in the otherwise dry landscape. Plants and animals have developed adaptations to survive the heat. For example, cacti store water, while the large ears of the Saharan fennec fox help dissipate heat and detect the sounds of underground prey. People have also developed clothing and underground dwellings suited to the desert climate.
Q12. Explain the importance of the River Nile to Africa.
Answer:
The River Nile is the longest river in the world, measuring almost 6,650 kilometres. Its basin was the cradle of the ancient Egyptian civilisation. For thousands of years, the river has supported human life by providing water and fertile land.
The Nile provides irrigation, transforming dry lands into fertile agricultural areas. Crops grown in these areas include wheat, barley, flax, fruits and vegetables. The river also provides drinking water, fishing opportunities and hydroelectric power. It has served as an important transportation route for centuries and continues to support agriculture and human settlements.
Q13. Describe the Andes Mountains and explain their importance.
Answer:
The Andes Mountains are located along the western coast of South America and form the largest mountain range on the continent. They are home to Mount Aconcagua, the highest peak in the Western Hemisphere. Bolivia’s Uyuni Salt Flats, the largest salt flat on Earth, are also found in this region.
The Andes are an important source of freshwater for millions of people and feed major rivers, including the Amazon. They support rich biodiversity, with thousands of species of mammals, birds, amphibians, reptiles and fish. The region is also rich in copper, zinc, silver and lithium. However, only about one-fourth of its original flora and fauna remains, making the Andes an important conservation hotspot.
Q14. Why is the Amazon Rainforest called the ‘Lungs of the Earth’? What threats does it face?
Answer:
The Amazon Rainforest is supported by the Amazon River and its tributaries in South America. It is called the ‘Lungs of the Earth’ because of its important role in the Earth’s natural processes and its rich plant life.
Almost 400 indigenous communities live in the forest and play an important role in its conservation. The rainforest provides habitats for a wide variety of plants and animals. Dust carried from the Sahara Desert to the Amazon also brings phosphorus needed by rainforest plants.
However, the Amazon is threatened by deforestation and climate change. Protecting the rainforest is important for conserving biodiversity, supporting indigenous communities and maintaining environmental balance.
Q15. How do human activities cause environmental problems? Explain with examples from the chapter.
Answer:
Human activities can disturb the natural balance of the environment and cause serious environmental problems. Deforestation, overuse of resources and pollution can lead to desertification, biodiversity loss and climate change.
The Great Barrier Reef is threatened by overfishing, pollution and climate change, which can cause coral bleaching and the loss of habitats for sea animals. The Amazon Rainforest faces deforestation and climate change. In the Atacama Desert, the rise of cheap fast fashion has resulted in large amounts of discarded clothing, creating an environmental and social problem.
These examples show why natural resources must be managed wisely. Conservation, reducing pollution and protecting ecosystems are important for sustainable development.
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