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World Geography: Some Glimpses

Class 8 Social Science – Chapter 1 Part 2

0°00’N, 0°00’E — every place on earth has an address. Read on to learn how it’s written.

01

Chapter at a Glance

A quick overview of the major ideas covered in this chapter.

What is this chapter about?
This chapter takes us on a tour of the world’s major landforms, oceans and geographical features. It also explains how these features affect climate, ecosystems, trade and human life.
Maps: Map projections and distortion
Oceans: Climate, currents and trade
Landforms: Mountains, plateaus, plains and deserts
Environment: Human impact and conservation
02

NCERT Question Answers

Click any question to reveal a simple, exam-ready answer.

Q1.Why do all map projections have some amount of distortion?
The Earth is almost spherical, while a map is a flat surface. It is not possible to represent the curved surface of the Earth perfectly on a flat map. Therefore, some change or distortion in shape, size, distance or direction occurs in every map projection. Different projections try to reduce different types of distortion.
Q2.What makes the Tibetan Plateau unique?
The Tibetan Plateau is unique because it is the highest and largest plateau in the world. It is also known as the “Third Pole” because it contains huge reserves of freshwater in the form of glaciers and snow. Many important rivers, including the Indus, Brahmaputra and Yangtze, originate from this region. The plateau also has a strong influence on the climate of Asia.
Q3.Why are coral reefs called the ‘rainforests of the sea’?
Coral reefs are called the “rainforests of the sea” because they support a very large variety of marine life. They provide food, shelter and breeding places for many sea animals, including fish, crabs, turtles and sponges. Like rainforests on land, coral reefs are rich and important ecosystems.
Q4.How do the oceans help to regulate the Earth’s climate?
Oceans help regulate the Earth’s climate by absorbing heat and releasing it slowly. They also provide moisture to the atmosphere, which helps in the formation of clouds and rainfall. Ocean currents carry warm and cold water from one region to another and influence the climate of nearby coastal areas.
Q5.What is the main reason for the Great Barrier Reef facing threats today?
The Great Barrier Reef is facing threats mainly because of human activities and climate change. Pollution and overfishing can damage the reef ecosystem, while rising temperatures can cause coral bleaching. These problems can harm corals and the many marine animals that depend on them.
Q6.Why is the Amazon Rainforest often called the ‘Lungs of the Earth’?
The Amazon Rainforest is often called the “Lungs of the Earth” because it is a huge forest with an enormous amount of plant life and plays an important role in the Earth’s environmental balance. It is also an important carbon-storing ecosystem and supports a great variety of plants and animals. However, deforestation and climate change are threatening this important rainforest.
Q7.Choose two different types of geographical features you have explored in this chapter. Write short paragraphs on how they influence the flora and fauna or human lives in that area. Do they also have an implication for the whole globe?

Mountains: Mountains influence the climate and provide water to people, plants and animals. Snow and glaciers in mountains are important sources of freshwater. Mountains also provide habitats for many plants and animals and contain useful natural resources. Rivers flowing from mountains support agriculture and human settlements.

Deserts: Deserts receive very little rainfall, so plants and animals living there have special adaptations to survive. People also adapt their lifestyle to the dry and harsh conditions. Deserts can support unique ecosystems and human communities. Changes in deserts can have wider effects because climate change and human activities can disturb these fragile environments.

Thus, geographical features do not affect only the people and wildlife living nearby. They can also influence climate, water resources, ecosystems and human activities on a much larger scale.

Q8.Discuss how oceans influence climate and trade. Use examples from the Indian and Pacific Oceans.

Oceans play an important role in controlling the Earth’s climate. They absorb heat, release it slowly and provide moisture for clouds and rainfall. Ocean currents also carry warm and cold water and influence the climate of coastal regions.

Oceans are also important for trade and transport. The Indian Ocean has been an important route for trade between different regions for a very long time. The Pacific Ocean is the largest and deepest ocean and is also an important area for shipping and trade. Thus, oceans connect different parts of the world both environmentally and economically.

Q9.Choose one environmental issue (deforestation, reef bleaching, or desertification) and explain its causes, impacts, and possible solutions.

Deforestation is an important environmental issue.

Causes: Forests may be cleared for agriculture, development and other human activities.

Impacts: Deforestation destroys the habitats of plants and animals and causes loss of biodiversity. It can also disturb ecosystems and contribute to climate change.

Possible solutions: We should protect forests, plant more trees, use forest resources carefully and prevent unnecessary clearing of forests. Sustainable use of natural resources can help protect forests for future generations. The chapter highlights deforestation as one of the major threats to the Amazon Rainforest.

Q10.Imagine you are a geographer asked to advise a government about protecting one major landscape in your country. Which one would you choose, and why?

I would choose the Himalayas for protection. The Himalayas are extremely important because their snow and glaciers provide freshwater to many rivers. They also influence the climate and provide habitats for many plants and animals.

Protecting the Himalayas would help conserve water resources, biodiversity and natural ecosystems. It would also benefit people who depend on Himalayan rivers and natural resources. Therefore, protecting this landscape is important for both the present and future generations.

Q11.Imagine that someone is funding a group of you for a road trip across two continents. There are differences of opinion on which two they should be. Make a pitch for the ones you would like everyone to go to.

I would choose Asia and Europe for the road trip because these two continents have a great variety of geographical features.

Our route could begin in India, then move towards the Tibetan Plateau, the Gobi Desert, the Ural Mountains, the European Plain and finally the Alps.

During the journey, we would see a high plateau, a vast desert, mountains, fertile plains and another major mountain range. We would also learn how different landforms influence climate, plants, animals, human settlements and economic activities. This would make the trip both educational and exciting.

03

Quick Revision

Key facts to revise before a test.

  • 71% of Earth’s surface is covered by oceans.
  • The Pacific Ocean is the largest and deepest ocean.
  • The Tibetan Plateau is the highest and largest plateau.
  • The Mariana Trench is the deepest ocean trench.
  • The Sahara is the largest hot desert.
  • Antarctica is the largest and coldest desert.
04

Frequently Asked Questions

Common doubts students may have about this chapter.

What is the main idea of this chapter?
The chapter helps us understand major geographical features of the Earth and how they are connected to climate, ecosystems and human life.
What are the seven continents?
Asia, Africa, Europe, North America, South America, Australia and Antarctica.
Why are oceans important?
Oceans help regulate climate, support marine life and provide important routes for trade and transport.
What is the Third Pole?
The Tibetan Plateau and its surrounding mountains are called the Third Pole because they contain very large freshwater reserves outside the polar regions.
World Geography: Some Glimpses — Class 8 Q&A · Field Notes