Chapter 3 — Landforms and Life
Complete solutions to every Let’s Explore (in-text) question and every Questions, Activities & Projects (exercise) — with detailed explanations and diagrams.
Let’s Explore — In-text Questions
The “Let’s Explore” and discussion boxes inside the chapter.
- Look around your school and describe the land — is it a flat plain, a rolling plateau, or a hilly/mountainous area? Note rivers, fields, hills or slopes you can see.
- Will it change? In a plain (like the Ganga plain) the landscape may stay similar for many kilometres. But near the edge of the mountains or a plateau, it can change within a few kilometres — flat fields giving way to hills and slopes.
- A journey example: “On a trip from Delhi to Manali, we first crossed the flat plains, then low hills, and finally steep snow-capped mountains with terraced fields and pine forests.” Compare your list with other groups.
This is an observation activity — your exact answer depends on where your school is and the journeys you have made.
- ‘Western to the eastern oceans’ means the Arabian Sea (to the west of India) and the Bay of Bengal (to the east). The ‘Lord of mountains’ is the Himalayas, which stretch across the whole north of India, roughly from the west near the Arabian Sea side to the east near the Bay of Bengal. On a map of India, find the Arabian Sea on the west coast, the Bay of Bengal on the east coast, and the Himalayas running along the northern border between them.
- Why the Gangā is mentioned (several reasons):
- The Gangā originates in the Himalayas from melting snow and glaciers — so the mountain and the river are physically linked.
- It is India’s largest and most sacred river, giving water and life to the plains below.
- The poet connects the mighty mountain with the life-giving river to show the Himalayas as the source of India’s water and culture.
- Flash flood: A sudden local flood, often caused by a cloudburst. Water rushes down steep slopes very fast, damaging homes, fields, roads and bridges.
- Landslide: A mass of earth or rock suddenly slides down a mountainside, blocking roads, burying houses and cutting off villages.
- Avalanche: A sudden fall of snow, ice or rock down a slope, often when snow starts melting. It is very dangerous for climbers and mountain villages.
- Cloudburst: A sudden, violent rainstorm that drops a huge amount of rain in a short time, triggering floods and landslides.
- Heavy snowfall & cold weather: Thick snow and freezing temperatures block roads, cut off supplies, and make daily life and farming very hard in winter.
- Uncontrolled tourism: Too many visitors and vehicles cause traffic jams, litter and pollution, and put the fragile mountain environment under great pressure.
Why people still live in the mountains: despite these challenges, the mountains offer pure air and beautiful scenery, income from tourism, farming in the valleys and herding, forests and water resources, and deep cultural, religious and ancestral ties (many peaks and pilgrimage sites are sacred). This shows human adaptability and resilience.
Mountain ranges: Rocky range Atlas range Andes range Ural range Himalaya range
Plateaus: Alaska plateau Patagonian plateau East African plateau Mongolian plateau Tibetan plateau
River plains: Mississippi plain Amazon plain Nile plain Indus plain Ganga & Brahmaputra plain Yangtze plain
Tip: Match each name’s colour on the map to the legend — brown for plateaus, green for river plains, orange for mountain ranges. You do not need to memorise these names.
- The Ganga plain is the GREEN area. The green colour shows the fertile, well-watered plain covered with fields and vegetation.
- The white expanse is snow on the high Himalayan mountains (along the top of the image), with some clouds. White stands for snow and clouds.
- The brown expanse at the bottom left is dry, arid land — the Thar Desert region of the north-west. Brown shows sandy, bare land with little vegetation.
- Sacred sources & confluences: the Triveni Sangam at Prayagraj (meeting of the Ganga, Yamuna and the mythical Sarasvatī), Devprayag (where the Alaknanda and Bhagirathi meet to form the Ganga), Gangotri and Yamunotri (the sources of the Ganga and Yamuna). Many communities hold such spots sacred and hold festivals there.
- River-visit activity: at a nearby river you might note economic activities (fishing, ferrying by boat, washing, farming, sand collection) and cultural activities (bathing on festivals, prayers, ceremonies, fairs). Write them down and discuss with classmates.
Your examples will depend on your own region — name the rivers and sacred spots near you.
- Mountains: Manali, Shimla, Nainital, Mussoorie, Darjeeling, Gulmarg, Ooty, Munnar, Leh–Ladakh.
- Plateaus: Mahabaleshwar & Panchgani (Deccan), Cherrapunji (Meghalaya plateau), Chikmagalur.
- Plains: Varanasi, Prayagraj, Haridwar, Agra (Ganga–Yamuna plains).
- Desert: Jaisalmer and Bikaner (Thar Desert).
- Coastal plains (bonus): Goa, Kochi, Puri.
Questions, Activities & Projects
The end-of-chapter exercise questions.
- Decide which of the three landforms best fits your area — plain (flat, fertile, farming; e.g. the Ganga plain), plateau (raised, flat-topped, rocky, mining; e.g. Deccan or Chhota Nagpur), or mountain/hill (high, steep slopes, forests, terrace farming).
- Then list the features you actually see — rivers, canals, fields, hills, slopes, forests, mines, waterfalls, and the main occupations (farming, herding, tourism, mining).
- Example: “My city is in the Ganga plain. I see flat land, farm fields of wheat and rice, canals, and a river nearby.”
This is personal — your answer depends on where you live.
- Chhota Nagpur (Jharkhand) — a PLATEAU. It rises above the surrounding land with a fairly flat but rocky surface. It is a ‘storehouse of minerals’ — rich in iron, coal and manganese — so mining is a major activity, and it has waterfalls like the Hundru Falls.
- Prayagraj (Uttar Pradesh) — a PLAIN. This is part of the flat, fertile Ganga plain. The soil is very fertile from river sediments, so agriculture is the main occupation, the population is dense, and it lies at a famous river confluence.
- Almora (Uttarakhand) — MOUNTAINS. Here the land is high and rugged with steep slopes, montane (conifer) forests, terrace farming on the slopes, cool climate, and tourism and pilgrimage as important activities.
| Pilgrimage spot | Landform |
|---|---|
| Kedarnath, Badrinath, Amarnath, Vaishno Devi, Gangotri, Yamunotri | Mountains (Himalayas) |
| Varanasi (Kashi), Prayagraj, Haridwar, Rishikesh | Plains (Ganga plain) |
| Tirupati, Shirdi, Nashik (Trimbakeshwar) | Hills / Plateau (Deccan & Eastern Ghats) |
| Kailash–Mansarovar | Mountains / Plateau (Tibetan) |
| Rameswaram, Dwarka, Puri | Coastal plains |
- FalseThe Himalayas are young mountains with rounded tops. The Himalayas are young, but they have tall, sharp peaks. Rounded tops belong to old mountains like the Aravallis.
- TruePlateaus usually rise sharply at least on one side. A plateau has a flat top but its sides are often steep slopes, so it rises sharply on at least one side.
- TrueMountains and hills belong to the same type of landform. Hills are simply lower highlands with gentler, rounded tops — they belong to the mountain category of landforms.
- FalseMountains, plateaus and rivers in India have the same types of flora and fauna. Different landforms have different climates, so their flora and fauna are different.
- FalseGanga is a tributary to the Yamuna. It is the other way round — the Yamuna is a tributary of the Ganga.
- TrueDeserts have unique flora and fauna. Deserts are dry with very little rainfall, so they have their own special plants and animals.
- TrueMelting snow feeds rivers. At lower altitudes, snow melts in summer and turns into water that feeds rivers.
- TrueSediments from rivers deposited in the plains make the land fertile. Rivers deposit rock, sand and silt (sediments) that make the soil of the plains very fertile.
- FalseAll deserts are hot. Some deserts are cold — like the Gobi Desert; even Antarctica is considered a (cold) desert.
| Word | Matches with | |
|---|---|---|
| Mount Everest | → | climbing |
| rafting | → | river |
| camels | → | desert |
| plateau | → | roof of the world |
| Ganga plains | → | rice fields |
| waterway | → | Ganga |
| Mount Kilimanjaro | → | Africa |
| Yamuna | → | tributary |
Why: people climb Everest; rafting is done on a river; camels live in the desert; the Tibetan plateau is the ‘roof of the world’; rice grows in the Ganga plains; the Ganga is used as a waterway; Kilimanjaro is in Africa; the Yamuna is a tributary of the Ganga.
