NCERT Solutions Exploring Society: India and Beyond Chapter 8 –32End of chapter — Questions and activities
Book page 31 Updated on2026-09-05
Q1.
Why do all map projections have some amount of distortion?
Answer
Because the Earth is an oblate spheroid — a curved surface — and a curved surface cannot be flattened without being stretched, squeezed or torn.
The chapter gives you the test yourself: peel an orange and try to lay the peel flat without tearing it. It cannot be done. Gaps open up, and to close them you must stretch the peel. That stretching is the distortion on every world map ever drawn.
The orange-peel test: gaps must be stretched shut, and the stretching is the distortion.
So a cartographer must choose what to keep true and what to sacrifice. That is why the chapter says every map is a compromise:
Projection
What it keeps true
What it distorts
Mercator (Fig. 1.2.1)
Shape and direction — which is what a sailor needs, so it is useful for navigation
Size, badly, near the poles. Greenland looks as big as Africa, and larger than India — though Greenland is in fact smaller than India.
Robinson (Fig. 1.2.2)
Nothing perfectly; it balances the two errors
A little of both size and shape — a compromise that simply looks more ‘realistic’
Why it happens: the stretching is not spread evenly. On the Mercator, the lines of longitude, which really meet at the poles, are drawn as parallel straight lines. Near the Equator they are almost parallel anyway, so little harm is done; near the poles they have been pulled far apart, so the land there is blown up enormously. That is the whole reason Greenland — a polar island — swells while India, near the Equator, does not. It also explains the chapter’s advice: to understand the world fairly, look at multiple projections, not just one, or use latitude and longitude coordinates, which professionals prefer because they are more precise.
Q2.
What makes the Tibetan Plateau unique?
Answer
It is the highest and largest plateau on Earth — no other plateau combines that height with that size.
Size and height. It stretches about 2,500 km from east to west and 1,000 km from north to south, with an average height of over 4,500 metres above sea level. Not a peak, but a whole flat land held up higher than most mountains.
How it was formed. It is the result of the collision between the Indo-Australian and Eurasian tectonic plates — the same collision that raised the Himalayan range on its southern rim. The plateau sits immediately north of that range.
Its effect on climate. This enormous block of high ground plays an important role in influencing the climate of Asia.
Its rivers. It is the source of many major rivers, including the Indus, the Brahmaputra and the Yangtze.
The ‘Third Pole’. Scientists give the plateau and its mountains this name because it contains the largest reserves of freshwater outside the polar regions.
A place where change is visible. With climate change, snow-melt has led to the expansion of existing lakes and the creation of new ones — the difference you can see between the 1987 and 2021 satellite pictures in Fig. 1.12.
Why it happens: its uniqueness follows from one fact — its height over a huge area. Height is why it is cold enough to hold ice at latitudes where India is tropical, which is why it stores freshwater and earns the name Third Pole. Height is why the great rivers of Asia begin there rather than end there. And height over an area of millions of square kilometres is why it can heat and cool enough air to affect the climate of a whole continent, instead of just its own valley.
Q3.
Why are coral reefs called the ‘rainforests of the sea’?
Answer
Because, like a rainforest, a reef packs an extraordinary amount of life into a very small space. Reefs are among the most diverse ecosystems on Earth, providing food and shelter for about one-quarter of all ocean species — fish, crabs, turtles and sponges among them — although reefs cover only a tiny fraction of the ocean floor.
The comparison holds in three ways:
Structure. A rainforest’s trees build a tall, branching frame full of hiding places; a reef’s corals — tiny sea animals — build a hard, branching ridge that does the same job underwater.
Diversity. The Great Barrier Reef alone is a complex, interconnected habitat housing hundreds of species of coral and thousands of species of fish and other sea animals.
Fragility. Both look permanent and are not. Reefs face serious threats from overfishing, pollution and climate change, so their conservation is crucial.
Why it happens: the reason both are so rich is the same in the sea as on land — a structure with many different niches. A flat sandy seabed offers one kind of place to live, so few species can share it. A reef offers ledges, caves, branches, sunlit tops and shaded undersides, each suiting a different animal, so hundreds of species can live side by side without competing for exactly the same thing. Corals can build this structure only in shallow, warm, clear, sunlit water — which is why reefs like the Great Barrier Reef lie on shallow tropical shelves, and why anything that clouds, warms or chemically changes that water threatens the whole structure at once.
Q4.
How do the oceans help to regulate the Earth’s climate?
Answer
In three ways, all of them following from the fact that the oceans cover about 71 per cent of the Earth’s surface and hold 97 per cent of its water.
They store heat and give it back slowly. Water heats up and cools down far more slowly than land. The ocean absorbs heat when the sun is strong and releases it slowly afterwards, so coastal places never get as hot in the day or as cold at night as places far inland — think of the difference between a summer night in Mumbai and one in Jaisalmer.
They put moisture into the air. Water evaporating from the ocean forms the clouds and the rainfall the land depends on. India’s entire monsoon is ocean water on its way back to the sea.
Their currents carry heat across the world. Warm currents bring warm water from the equator toward the poles; cold currents bring cold water from the poles toward the equator. The chapter’s example is the Gulf Stream, which flows north from near the Equator through the Atlantic towards Western Europe and makes places like the United Kingdom warmer than other places at the same latitude.
Warm and cold currents act as the Earth’s heat delivery system.
Why it happens: the sun does not heat the Earth evenly — it strikes the Equator almost straight on and the poles at a slant. Left to itself that would make the tropics unbearably hot and the poles far colder still. The oceans (with the winds) even the difference out, moving warmth polewards and cold equatorwards, and holding on to heat so that no place swings too fast between day and night or summer and winter. The oceans also work chemically: their plankton absorb carbon dioxide, and the water itself dissolves it, slowing the warming caused by that gas.
Q5.
What is the main reason for the Great Barrier Reef facing threats today?
Answer
Human activity — and above all the way it is changing the ocean water itself. The chapter is explicit under Fig. 1.9: the bleaching and death of coral occurs due to changes in the chemical composition of ocean waters, largely caused by human actions, and it leads to the loss of habitat of a whole host of sea animals.
Three human pressures are named:
Climate change — warmer, chemically altered water, which is what bleaches the coral;
Pollution — including what runs off the land into the sea;
Overfishing — which strips out the animals that keep the reef in balance.
All three come from people, so conservation of the reef is described as crucial.
Why it happens: corals are living animals that can survive only in a narrow band of conditions — warm but not too warm, clear, and of the right chemistry. When the water moves outside that band, the coral loses the colour it gets from the tiny organisms living inside it, turns white and dies. That single death takes a whole community with it, because the reef is the house the other animals live in, not merely a neighbour. Losing the coral is like losing the trees of a forest: everything that depended on the structure goes too. And because the reef stretches over 2,000 km and covers about 350,000 square kilometres, a change spread across the ocean can damage all of it at once, which local protection alone cannot prevent.
Q6.
Why is the Amazon Rainforest often called the ‘Lungs of the Earth’?
Answer
Because its trees exchange gases with the air on a scale nothing else on land can match. The Amazon is an area of tall, mostly evergreen trees receiving a very high amount of rainfall, so its leaves work all year round, taking in carbon dioxide and giving out oxygen — which is what lungs do.
It is supported by the basin of the Amazon River, the longest river in South America and the world’s largest river by volume, which flows from the Andes Mountains in Peru east towards the Atlantic Ocean, together with all its tributaries.
Almost 400 indigenous communities live in the forest and play an important role in conserving it.
Today it is threatened by deforestation and climate change — which is why the name is used as a warning as much as a compliment.
Why it happens: the comparison is worth examining rather than repeating. A mature rainforest also uses up much of the oxygen it produces, because fallen leaves and dead wood rot on the forest floor and rotting consumes oxygen. So the Amazon is not literally refilling the world’s oxygen tank. What it genuinely does is store an immense amount of carbon in its wood, roots and soil — carbon that goes straight back into the air if the forest is cut or burnt — and recycle moisture, drawing water up through its roots and breathing it out from its leaves, where it forms cloud and falls again as rain. In that sense it regulates the air and the rainfall of a large part of the planet, which is what the phrase is really pointing at.
Did you know? Dust travels all the way from the Sahara to the Amazon, carrying with it the phosphorus the rainforest plants need. The two greatest features of two different continents are joined by the wind.
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?
Answer
How to build this answer. Pick two features of genuinely different kinds — one on land and one in the sea works best. For each, write one paragraph in three moves: what the feature is, how it shapes the plants, animals and people who live with it, and what it does for the rest of the world. Then finish with a sentence that links the two.
Sample answer:
The Sahara Desert (a hot desert, Africa). The Sahara is the largest hot desert in the world, with temperatures ranging from 30°C to 46°C, rainfall below 25 cm and hardly any vegetation. Everything that lives there is shaped by that shortage of water and excess of heat. Cacti store water in their leaves; date palms crowd around the oases, where water reaches the surface. The Saharan fennec fox has very large ears that let it dissipate heat and hear prey moving underground. People have adapted just as deliberately: nomadic tribes herd sheep, goats and camels and move with them; their loose traditional clothing and headgear are designed to keep the body cool; and some build their houses underground, a design that stays cool in summer and warm in winter. For the globe, the Sahara matters twice over — its ancient trade routes carried gold, salt and ideas to the Mediterranean world, and today dust blown from it crosses the Atlantic to deliver phosphorus to the Amazon Rainforest.
The Great Barrier Reef (a coral reef, off Australia). The reef stretches over 2,000 km and covers about 350,000 square kilometres, and is recognised as a UNESCO World Heritage Site. Because corals build a branching structure full of ledges and hiding places, the reef houses hundreds of species of coral and thousands of species of fish and other sea animals; reefs as a whole provide food and shelter for about one-quarter of all ocean species, which is why they are called the ‘rainforests of the sea’. People living along that coast depend on the reef for fishing and for tourism. Its global implication is that the reef is a warning system: bleaching occurs when the chemical composition of ocean waters changes, largely because of human actions, so the whiteness spreading across the coral is a measurement of what the world is doing to its oceans.
Linking them. A desert and a reef could hardly be more different, yet both make the same point. Each is a place where life survives inside narrow limits; each supports human ways of life built around those limits; and each is now being changed by decisions taken far away, by people who will never see it.
Why it happens: when you choose features for a question like this, pick ones where the global link is easy to prove. Sahara dust feeding the Amazon and reef bleaching caused by ocean chemistry are both cases where a local feature and a planetary process are visibly connected — far stronger evidence than a general claim that ‘everything is connected’.
Q8.
Discuss how oceans influence climate and trade. Use examples from the Indian and Pacific Oceans.
Answer
Indian Ocean
Pacific Ocean
Its character (Fig. 1.5)
Warm waters, rich biodiversity, historically important for international trade
The largest and deepest of the oceans; home to whales and tuna
Influence on climate
The distant Southern Indian Ocean influences the monsoon in the Gangetic Plains — the rains that decide India’s farming year begin as moisture lifted off this ocean. The Bay of Bengal, the world’s largest bay, also influences the climate of the lands around it.
Its sheer size makes it the world’s largest store of heat and moisture; being the deepest, it also holds the Mariana Trench, whose Challenger Deep reaches over 11,000 metres below sea level — over 2,000 metres deeper than Mount Everest is high.
Influence on trade
The Persian Gulf has carried trade between India and Europe for millennia; the Strait of Malacca is a narrow channel joining two seas through which a great share of Asian shipping passes; the Suez Canal, opened in 1869, links the Red Sea to the Mediterranean and gives the shortest maritime route from India to Europe (Fig. 1.10). Bays such as the Bay of Bengal give ports and dockyards safe havens sheltered from the strong winds of the open ocean.
A rich fishing ground feeding the countries around it, and the highway between the industrial coasts of Asia and the Americas.
Why it happens: the two influences are really one. An ocean shapes climate because water stores heat and releases moisture; it shapes trade because it is a flat, free road on which heavy goods can be carried cheaply. Where the two meet, geography decides history. India’s coast faces a warm ocean whose winds blow towards the land in one season and away from it in another — so Indian sailors could ride the monsoon out to Africa and Arabia and ride it home again, centuries before engines existed. That is exactly why the Indian Ocean became historically important for international trade, and why a narrow point on its route, such as the Strait of Malacca or the man-made Suez Canal, carries an importance out of all proportion to its size.
Q9.
Choose one environmental issue (deforestation, reef bleaching, or desertification) and explain its causes, impacts, and possible solutions.
Answer
Issue chosen: reef bleaching.
What it is. Bleaching is the whitening and then the death of coral. Since the coral is the structure the whole reef community lives in, its death leads to the loss of habitat of a whole host of sea animals (Fig. 1.9).
Causes. The chapter states the main one directly: bleaching occurs due to changes in the chemical composition of ocean waters, largely caused by human actions. Alongside this the reef faces overfishing, pollution and climate change. Warmer water, altered water chemistry, chemicals and silt washed off the land, and the removal of the fish that keep the reef balanced all push the coral outside the narrow conditions it can survive in.
Impacts.
The thousands of species of fish and other sea animals that shelter in the reef lose their home; since reefs shelter about one-quarter of all ocean species, the loss is out of all proportion to the area affected.
Coastal communities lose fishing grounds and tourism income.
Coasts lose the reef’s protection, since a living reef breaks the force of waves and storms before they reach the shore.
Possible solutions.
Cut the greenhouse gas emissions that are warming and altering the ocean — the only cure that reaches the main cause.
Control what enters the sea from the land: treated sewage, less chemical run-off from farms, no plastic dumping.
Regulate fishing and enforce protected zones so the reef’s own animals can keep it healthy.
Protect and monitor the reef as the UNESCO World Heritage Site it is, and support coral restoration where damage has already occurred.
If you choose instead…
Main causes
Main impacts
Main solutions
Deforestation
Clearing forest for farmland, cattle, mining and roads; logging; burning
Loss of habitat and of species; displacement of forest communities; thin soil washed away; stored carbon released into the air; less rain, as fewer trees return moisture
Legal rights and support for forest communities; earning from a standing forest (fruit, nuts, rubber, tourism); satellite monitoring of illegal clearing; replanting; international funding
Desertification
Overgrazing, over-cultivation, cutting of trees and shrubs, over-use of groundwater, and a warming, drying climate
Fertile land turns barren; crops and pasture fail; wells run dry; people are forced to migrate
Rotational grazing; tree belts to hold soil and slow the wind; rainwater harvesting and check dams; restoring native grasses; growing crops suited to dry land
Why it happens: all three issues share one shape — a slow change that stays invisible until it passes a point of no return. A reef looks fine until the summer it bleaches; soil looks fine until the season it will not grow anything. This is why prevention is so much cheaper than repair, and why the Yellowstone story on page 28 is worth remembering: the imbalance there took years to build up and was reversed only by a deliberate act, reintroducing wolves in 1995.
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?
Answer
How to build this answer. You are giving advice, so structure it as advice: name the landscape, say precisely what is threatening it, say what it does for the country (not just why it is beautiful), and then give recommendations a government could actually carry out. Choose a landscape you know something concrete about — a nearby river, forest, coast, hill range or wetland is better than a famous one you know only by name.
Sample answer:
Landscape chosen: the Western Ghats.
What it is and what it does. The Western Ghats are an old, forested range running down the western edge of peninsular India. They act as the water tower of the whole peninsula: the Godavari, the Krishna, the Kaveri and dozens of smaller rivers rise in them, and the reservoirs that supply Mumbai, Pune, Bengaluru and Chennai are filled by rain that these hills catch. They catch it because they stand across the path of the south-west monsoon winds, forcing the moist air to rise and drop its rain on their western slopes — which is also why the land east of them, in the rain shadow, is so much drier. They are, in addition, one of the richest storehouses of plants and animals in the country, with many species found nowhere else.
What threatens them. Forest cleared for plantations, quarrying and mining, hill roads and construction that loosen the slopes and cause landslides during heavy rain, and dams and diversions that change the rivers themselves.
My recommendations to the government. First, protect the remaining continuous forest as a connected belt rather than as scattered patches, so that animals can move between them. Second, regulate quarrying and hill-slope construction strictly, since a bare slope in monsoon country becomes a landslide. Third, involve the people who live in the Ghats, giving forest communities a legal share in protecting and earning from the forest, as the indigenous communities of the Amazon do. Fourth, monitor the forest cover by satellite each year and publish the figures, so that loss is caught early. Finally, treat the Ghats as water infrastructure in the budget, not as scenery: every rupee spent protecting the catchment is a rupee not spent on water scarcity in four state capitals.
Why it happens: the strongest argument to a government is rarely ‘this place is precious’. It is ‘this place is already doing an expensive job for free’. The Western Ghats supply water and hold soil in place; a reef breaks storm waves; a mangrove shields a coast; a forest stores carbon. Once the service is named, protection becomes the cheaper option instead of the generous one — and that is the case a geographer is best placed to make.
Tip: Other strong choices, each with a clear service you can argue for: the Sundarbans mangroves (storm protection and fish nurseries), the Himalayan glaciers (dry-season river flow), the Thar Desert (a fragile dryland ecosystem with its own unique life), the Gulf of Mannar coral reefs, or the Chilika and Loktak lakes.
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. Use a blank map, trace your route and locate the places on it, and try to convince the others to your point of view. You could use a variety of creative ways.
Answer
How to make a pitch that wins. A pitch is not a list of places; it is an argument. Build it in four parts: (1) the idea that ties the trip together in one sentence; (2) the route, traced on your blank map with each stop marked; (3) the reason each stop earns its place — a landform you cannot see anywhere else; (4) the practical case — that the route is continuous by road, and that the two continents are joined by land so no flight is needed. Then present it creatively: a hand-drawn map with the route in colour, a short skit as travel guides, a poster of the five stops, or a day-by-day travel diary written in advance.
Sample pitch: Asia and Europe — ‘From the Roof of the World to the Great Plain’.
The idea: Asia and Europe are one continuous landmass, so this is the only pair of continents you can cross end to end without ever leaving the road — and along the way the land itself changes from the highest place on Earth to one of the flattest.
Stop
Landform
Why it earns its place
1. Edge of the Tibetan Plateau
Plateau
The highest and largest plateau on Earth, averaging over 4,500 m — the ‘Third Pole’, where the Indus and the Brahmaputra begin
2. Gobi Desert, Mongolia
Cold desert
The ‘Land of the Eternal Blue Sky’ — 8 to 9 months of sunshine, yet winter temperatures down to −30°C. Proof that a desert need not be hot.
3. The Eurasian Steppes
Temperate grassland
Over 8,000 km of open grass, a global carbon sink, a resting place for the Siberian crane — and a night in a yurt
4. The Ural Mountains
Ancient mountain range
We cross from Asia into Europe on foot at the natural boundary between the two continents, in a range famous for its caves and its semiprecious stones
5. The European Plain, ending in the Alps
Plain, then young mountains
One of the largest flat lands in the world, its wheat fields and river valleys, finishing at the 1,200 km crescent of the Alps
The closing line of the pitch: ‘Any trip can show you five beautiful places. This one shows you why they are different from one another — because in six weeks we will have driven from the highest land on Earth, across a desert too far inland for rain, over a grassland, past a mountain wall old enough to have been worn flat, and onto a plain built by rivers. That is the whole of this chapter, seen from a bus window.’
Why it happens: the reason this route is persuasive is that it follows a real geographical logic rather than a wish-list. Height falls steadily from stop 1 to stop 5; rainfall rises as you move away from the deep interior towards the Atlantic; and the age of the rock changes from the young, still-rising Himalaya and Alps to the ancient, worn-down Urals. When you argue for a route, an argument built on a pattern will always beat one built on preference.
Try This: If your group prefers a different pair, the strongest rivals are Africa and Asia (joined at the Suez, so also drivable: the Nile, the Sahara, the savannah, then the Persian Gulf and home to India) and North and South America (the Great Lakes, the Rockies, the Colorado Plateau and Grand Canyon, then the Andes, the Amazon and the Atacama). Make them argue their route the same way — idea, map, reason per stop, practicality.