This MCQ module is based on: Deserts, Plateaus & Coasts
TOPIC 2 OF 42
Deserts, Plateaus & Coasts
🎓 Class 7
Social Science
CBSE
Theory
Ch 1 — Geographical Diversity of India
⏱ ~15 min
🌐 Language: [gtranslate]
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[myaischool_lt_sst_assessment grade_level="class_7" subject="geography" difficulty="basic"]
Geographical Diversity of India — Deserts, Plateaus & Coasts
NCERT Class 7 — Exploring Society: India and Beyond | Chapter 1 — Geography
The Great Indian Desert — The Thar
Moving westward on the map, we encounter a yellowish area — the Thar Desert?. Picture a vast stretch of golden dunes, rugged terrain, and a wide-open sky. Sand dunes here are formed when wind shifts and shapes the sand into hill-like formations, sometimes rising as high as 150 metres.
The Thar is a vast arid region spanning the states of Rajasthan, Gujarat, Punjab, and Haryana. It acts as a natural barrier due to extremely high daytime temperatures, cold nights, and a severe lack of water. People living in the Thar have adapted their food habits, clothing, and lifestyle to these harsh conditions.
LET’S EXPLORE — The Shape of Sand Dunes
L4 Analyse
Mountains are made of rock and their shape is fixed. Sand dunes, however, are made of loose sand yet also form hill-like shapes. Why do you think sand dunes have a similar shape even though their material is so different?
Guidance
Sand dunes form their shape because of wind — the wind pushes sand grains up one side and they slide down the other, naturally creating a slope. Gravity pulls sand downward just as it shapes mountain slopes. The key difference is that dunes constantly shift with the wind, while mountains remain fixed.
DON’T MISS OUT — Water Wisdom of the Thar
L2 Understand
Water is scarce in the desert. Women often travel long distances daily to fetch water for their families. A traditional method for cleaning utensils involves scouring them with sand — and the little rinse water used is reused for watering plants. Rajasthan is also famous for ingenious water conservation methods, including taanka? or kunds — special systems that collect and store rainwater, often for drinking purposes.
UNESCO Heritage
Jaisalmer, known as the “Golden City,” sits in the heart of the Thar Desert. The Jaisalmer Fort is a UNESCO World Heritage Site — a living fort where people still reside within its walls.
The Aravalli Hills — Ancient Guardians
Tracing eastward from the Thar Desert on the map, you will see the Aravalli Hills?. These are among the oldest mountains in the world — roughly 2.5 billion years old! Although the highest peak, Mount Abu, rises above 1700 m, most of the range’s hills are between 300 and 900 metres high. A drive of about four and a half hours can take you from Mount Abu straight into Jodhpur in the Thar Desert — a completely different geography.
LET’S EXPLORE — States of the Aravallis
L3 Apply
Look at the political map in your textbook and identify the states that the Aravalli range spans. Did you find Delhi, Rajasthan, Haryana, and Gujarat?
One of the Aravallis’ most important roles is acting as a natural barrier that prevents the Thar Desert from expanding eastward. The hills also shape the climate of northwestern India by influencing wind patterns.
The Aravallis are rich in minerals like marble, granite, zinc, and copper. Evidence from ancient mines at Zawar shows that over eight centuries ago, Indians were the first in the world to master the extraction of zinc. Historic forts such as Chittorgarh, Kumbhalgarh, and Ranthambore are nestled in these hills.
The Peninsular Plateau — India’s Ancient Heartland
Definition
Plateau: A landform that rises above the surrounding land and has a more or less flat surface, often with steep slopes on its sides.Peninsula: A piece of land surrounded by water on three sides.
India’s most important plateau is the triangular Peninsular Plateau? in the middle and south of the country. It is an extremely old land formation, surrounded on three sides by the Arabian Sea, the Bay of Bengal, and the Indian Ocean.
The Western and Eastern Ghats
The plateau is bordered by two mountain ranges. The Western Ghats (also called the Sahyadri Hills in the north) are taller and run along the western coast like a wall, with many waterfalls cascading down their steep sides during the monsoon. The Eastern Ghats are lower and broken into smaller hill formations along the eastern coast.
UNESCO Heritage
The Western Ghats have been declared a UNESCO World Heritage Site. They are home to many rivers and harbour extraordinary biodiversity, including the lion-tailed macaque, king cobra, and even insectivorous plants that catch and digest insects!
Rivers of the Plateau
The plateau tilts slightly eastward, so most rivers here flow towards the Bay of Bengal. East-flowing rivers like the Godavari, Krishna, Kaveri, and Mahanadi provide water for farming, industries, and hydroelectric power. West-flowing rivers like the Narmada and Tapti drain into the Arabian Sea.
Dense forests on the plateau are home to tribal communities including the Santhal, Gond, Baiga, Bhil, and Korku. These tribes have distinct languages, traditions, and ways of life closely connected to nature.
LET’S EXPLORE — Where Do Tribal Communities Live?
L3 Apply
Tribal communities are largely spread over Jharkhand, West Bengal, Odisha, Assam, Madhya Pradesh, Chhattisgarh, Maharashtra, Telangana, and Gujarat. Using both the physical and political maps, locate these states and connect them to their position on the physical map. What type of terrain do most of these states share?
Guidance
Most of these states lie on or near the Deccan Plateau and have forested, hilly terrain. The dense forests and rugged landscape have allowed tribal communities to maintain their distinct cultures for centuries.
India’s Amazing Coastlines
India’s coastline stretches over 7500 km, dotted with beautiful beaches, rocky cliffs, and lush green forests. Some beaches have golden sand while others have black rocks; some islands have coral reefs while others are covered in thick jungles.
LET’S EXPLORE — Coastal Rivers and Deltas
L3 Apply
Using the physical map, find the names of five rivers that flow into the Bay of Bengal. Also identify India’s coastal states and discuss the difference between the western and eastern coastal plains.
Bonus: When rivers split into multiple streams near the coast, what is that formation called?
Guidance
Rivers flowing into the Bay of Bengal include the Ganga, Godavari, Krishna, Kaveri, and Mahanadi. When rivers split near the coast, the formation is called a delta. The western coast is narrow with estuaries, while the eastern coast has wide plains with major river deltas.
The West Coast
The West Coast stretches from Gujarat to Kerala, passing through Maharashtra, Goa, and Karnataka. Most rivers here originate in the Western Ghats, flow swiftly, and form estuaries?. The Narmada and Tapti estuaries are the largest. Important ports and cities along this coast have been centres of economic activity for millennia.
The East Coast
The East Coast lies between the Eastern Ghats and the Bay of Bengal, stretching from the Ganga delta to Kanyakumari. It features wide plains and major river deltas? formed by the Mahanadi, Godavari, Krishna, and Kaveri. Important water bodies like Chilika Lake and Pulicat Lake (a lagoon) are found here. The fertile deltas make this region ideal for farming.
Indian Islands — Outposts in the Ocean
Lakshadweep Islands
Lakshadweep? is an archipelago (a group of islands) located in the Arabian Sea, close to the Malabar coast of Kerala. It is made up of 36 coral islands, though not all are inhabited. India controls a vast marine area around these islands, allowing for fishing, resource exploration, and environmental protection.
Andaman and Nicobar Islands
This archipelago comprises more than 500 large and small volcanic islands, divided into the Andaman and the Nicobar groups. Their strategic location makes them like the outposts of India, keeping watch over the ocean. The islands are home to a rich variety of flora and fauna. Several ancient tribes have called these islands home for tens of thousands of years.
DON’T MISS OUT — India’s Only Active Volcano
L2 Understand
Barren Island in the Andaman and Nicobar Islands is the only active volcano in India. It sometimes erupts, sending smoke and lava into the sky! The Andaman Islands are also significant historically — many freedom fighters were imprisoned in the Cellular Jail under severe conditions. It has been preserved as a reminder of the tremendous sacrifices our forefathers made.
The Sundarbans & the Hills of the Northeast
The Sundarbans Delta
Travelling back from the islands towards the eastern side of the Himalayas via the Bay of Bengal, we reach the Sundarbans?. Located in the delta of the Ganga and Brahmaputra rivers, this unique ecosystem combines river, sea, and land. About half lies in India and the rest in Bangladesh. It is a UNESCO Heritage Site and is home to the majestic Royal Bengal Tiger.
The Hills of the Northeast
Moving further, we reach the hills of the Northeast — the Garo, Khasi, and Jaintia hills, part of the Meghalaya Plateau. This region is known for lush greenery, heavy rainfall, and breathtaking waterfalls. It experiences some of the highest rainfall in the world, making it rich in forests, unique wildlife, and fertile land.
DON’T MISS OUT — Asia’s Cleanest Village
L2 Understand
Mawlynnong Village in the East Khasi Hills of Meghalaya is renowned as the cleanest village in Asia. Famous for its bamboo dustbins and eco-friendly living, the village is also known for its living root bridges — created by weaving tree roots over many years. These bridges showcase the extraordinary craftsmanship of the tribal communities of the Northeast.
Major River Deltas — Area Comparison
L4 AnalyseFigure: Approximate area (sq km) of India’s major river deltas on the east coast
India’s Geographic Regions — Overview
L2 Understand
INDIA’S GEOGRAPHY
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Himalayas
Himadri, Himachal, Shivalik
Himadri, Himachal, Shivalik
Deserts
Thar (Hot), Ladakh (Cold)
Thar (Hot), Ladakh (Cold)
Plains
Gangetic / Northern Plains
Gangetic / Northern Plains
Plateau
Deccan, Ghats, Aravallis
Deccan, Ghats, Aravallis
Coasts & Islands
West, East, Lakshadweep, A&N
West, East, Lakshadweep, A&N
Northeast Hills
Garo, Khasi, Jaintia
Garo, Khasi, Jaintia
Figure: Summary of India’s major geographic regions covered in this chapter
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Competency-Based Questions
Case Study: Priya’s family is moving from Jaisalmer (Thar Desert) to Kochi (west coast of Kerala). Priya notices that everything is different — the weather, the vegetation, the food, and even the way houses are built.
Q1. Which of the following best explains why the Aravallis are important for northwestern India?
L2 Understand
Q2. Why might Priya notice that houses in Kochi are built very differently from those in Jaisalmer?
L3 Apply
Q3. Compare the east coast and west coast of India in terms of their physical features. Give two differences.
L4 Analyse
HOT Q. Design a poster showing how people in any two different geographical regions of India have adapted their lives to their environment.
L6 Create
🎯 Variety Question Block — Practice
✅ True or False
1. The Western Ghats are lower than the Eastern Ghats.
2. Lakshadweep is a group of coral islands in the Arabian Sea.
3. Barren Island in the Andaman and Nicobar Islands is India’s only active volcano.
4. The Aravallis are the youngest mountains in the world.
1. The Western Ghats are lower than the Eastern Ghats.
FALSE
Correction: The Western Ghats are taller and more continuous; the Eastern Ghats are lower and fragmented.
2. Lakshadweep is a group of coral islands in the Arabian Sea.
TRUE
3. Barren Island in the Andaman and Nicobar Islands is India’s only active volcano.
TRUE
4. The Aravallis are the youngest mountains in the world.
FALSE
Correction: The Aravallis are among the oldest mountains in the world, about 2.5 billion years old.
🔗 Match the Following
A. Sundarbans
→
1. Only active volcano in India
B. Barren Island
→
2. Cleanest village in Asia
C. Mawlynnong
→
3. Home of the Royal Bengal Tiger
D. Jaisalmer
→
4. The Golden City
Correct Matches
A → 3 (Sundarbans = Royal Bengal Tiger) | B → 1 (Barren Island = Active Volcano) | C → 2 (Mawlynnong = Cleanest Village) | D → 4 (Jaisalmer = Golden City)
✍ Creative / Open-Ended
Think and Write: India has been called a “mini-continent” because of its extraordinary geographical diversity. In 5–6 sentences, explain why this description is appropriate, using examples of at least three different geographical regions.
Continue Learning — Chapter 1: Geographical Diversity of India
External: Official NCERT Textbooks | CBSE Curriculum 2025
Frequently Asked Questions — Deserts Plateaus Coasts
What is the Thar Desert and where is it located?
The Thar Desert, also called the Great Indian Desert, is a vast arid region located primarily in the state of Rajasthan, with parts extending into Gujarat, Punjab, and Haryana. It acts as a natural barrier in western India. The desert experiences extreme temperatures — scorching hot during the day and bitterly cold at night. Sand dunes in the Thar can rise as high as 150 metres. Despite harsh conditions, communities survive through traditional water harvesting methods like taankas (underground rainwater tanks).
What are the Aravalli Hills and why are they important?
The Aravalli Hills are one of the oldest mountain ranges in the world, approximately 2.5 billion years old. They stretch across Delhi, Rajasthan, Haryana, and Gujarat. The Aravallis are important because they serve as a natural barrier preventing the Thar Desert from expanding eastward into the fertile Gangetic Plains. Evidence from mines at Zawar shows that Indians mastered zinc extraction over 800 years ago — a world first. The range is also an important catchment for rivers and supports biodiversity.
What is the Deccan Plateau?
The Deccan Plateau is a vast triangular plateau in central and southern India, bordered by the Western Ghats on the west and the Eastern Ghats on the east. It is one of India's oldest land formations, made of ancient volcanic rocks. The plateau tilts eastward, which is why most of its rivers — like the Godavari, Krishna, and Kaveri — flow towards the Bay of Bengal. The Deccan is rich in minerals including iron ore, manganese, and coal, making it an important economic region.
What is the difference between an estuary and a delta?
An estuary is a partially enclosed coastal area where a river meets the sea, creating a mixing zone of fresh and salt water with a unique ecosystem. Estuaries are common along India's west coast (Narmada and Tapti rivers). A delta is a landform created when a river deposits sediment at its mouth, building up a triangular or fan-shaped fertile area over time. The east coast has major deltas like the Ganga-Brahmaputra delta — the world's largest. The key difference is that estuaries are water-dominated while deltas are land-dominated.
What are the major island groups of India?
India has two major island groups: (1) Lakshadweep — an archipelago of 36 coral islands in the Arabian Sea near the coast of Kerala, known for pristine coral reefs; and (2) Andaman and Nicobar Islands — a chain of over 570 islands in the Bay of Bengal, including the famous Barren Island (India's only active volcano). Lakshadweep islands are low-lying coral formations, while the Andaman and Nicobar islands are largely volcanic in origin and covered with dense tropical forests.
What are the Sundarbans and why are they famous?
The Sundarbans are a vast mangrove forest located in the delta of the Ganga and Brahmaputra rivers, shared between India and Bangladesh. They are a UNESCO World Heritage Site and the largest mangrove forest in the world. The Sundarbans are most famous as the natural habitat of the Royal Bengal Tiger. The name comes from the sundari tree, the dominant mangrove species found here. The forest also protects coastal areas from cyclones and storm surges, acting as a natural shield.
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