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Geographical Diversity of India Class 7 Social Science Notes

Geographical Diversity of India

India's unique geography distinguishes it from other countries, contributing to its national identity, as noted by Sri Aurobindo. India's diverse landscape includes:

Plateaus
Waterfalls

Example

The Jog Falls in Karnataka demonstrate this diversity, showcasing a plateau and powerful waterfalls. The energy of the waterfalls is converted into hydroelectricity, illustrating how geography can be harnessed for power.

Rakesh Sharma, the first Indian astronaut, famously said India looks "Sāre jahān se achchha" (better than the whole world) from space, reflecting a deep sense of national pride.

India is the seventh-largest country in the world and is part of the continent of Asia. It forms the Indian Subcontinent along with its neighbors:

Pakistan
Bangladesh
Nepal
Bhutan
Sri Lanka
Myanmar

For discussion, India is often divided into five regions:

The great mountain zone
The plains of the Ganga and the Indus
The desert region
The southern peninsula
The islands

India's geographical features have significantly shaped its climate, culture, and history. The Himalayan Mountain range acts as a natural barrier in the north, while the Thar Desert and the Arabian Sea define its western boundaries. To the south lies the Indian Ocean, and to the east, the Bay of Bengal.

Note

The different colors on a physical map indicate the altitudes of different areas.

The Himalayas

The Himalayan Range acts as a massive wall, stretching approximately 2,500 km.

Note

Many Himalayan peaks exceed 8,000 meters in height and are known as the 'Eight Thousanders'.

This mountain range spans six countries in Asia:

India
Nepal
Bhutan
China
Pakistan
Afghanistan

In the summer, the snow melts and feeds major rivers like the Ganga, Indus, and Brahmaputra. These rivers provide water for:

Drinking
Farming
Industrial use

Note

Because they feed so many rivers, the Himalayas are often called the 'Water Tower of Asia'.

The Himalayas hold cultural and religious significance, with temples and monasteries attracting monks and spiritual seekers. The Bhagirathi River, a major tributary of the Ganga, originates from Gaumukh ('Cow's Mouth') in Uttarakhand, at the edge of the Gangotri Glacier, a sacred site for pilgrims and a popular trekking destination.

How the Himalayas were formed

Long ago, India was part of a larger landmass called 'Gondwana', neighboring Africa. Around 50 million years ago, India broke away and collided with Eurasia. The collision caused the land between them to crumple and rise, forming the Himalayan mountains.

Note

India is still pushing into Asia at about five centimeters per year, causing the Himalayas to continue growing.

The word 'Himalaya' combines two Sanskrit words:

hima, meaning 'snow'
ālaya, meaning 'abode' or 'dwelling'

Thus, 'Himalaya' means 'abode of snow'.

Three Main Himalayan Ranges

The Himadri (Greater Himalayas): The highest and most rugged range, home to peaks like Mount Everest and Kanchenjunga. It remains snow-covered year-round with sparse human settlements.
The Himachal (Lower Himalayas): Located south of the Greater Himalayas, with a moderate climate supporting biodiversity and human habitation. Popular hill stations like Nainital, Darjeeling, Shimla, and Mussoorie are found here.
The Shivalik Hills (Outer Himalayas): The outermost and lowest range, featuring rolling hills and dense forests. These foothills serve as a transition zone to the Gangetic Plains.

Example

The traditional house construction method in the western Himalayan region, known as 'kath-kuni' or 'dhajjidewari', uses local stone and wood, providing warmth and earthquake resistance.

Note

The Great Himalayan National Park in Himachal Pradesh, a UNESCO World Heritage Site, preserves its rich biodiversity with the help of the government and local communities.

The cold desert of India

While deserts are usually thought of as hot places, India also has cold deserts. Ladakh is a cold desert where winter temperatures drop below -30°C. It receives very little rainfall and features a rugged landscape with:

Rocky terrain
Deep valleys
Lakes (like Pangong Tso)

The terrain resembles the moon, earning it the name 'moonland'. This landscape was formed when the Indian landmass collided with Eurasia, folding the mountains. The rocks in this area are composed of sand and clay, shaped by wind and rain.

Despite harsh conditions, Ladakh supports unique wildlife like:

Snow leopards
Ibex
Tibetan antelopes

The Ladakhi people lead simple lives, and the region is known for its ancient monasteries and colorful festivals like Losar and the Hemis Festival.

Note

Yaks are very important for the lives of people in the Himalayas. They are reared for their milk, meat, wool and dung, and are also used for transport.

Note

Pangong Tso in Ladakh is a salty lake due to minerals dissolving from the surrounding mountains.

The Gangetic Plains

Moving south from the Himalayas, we reach the vast and fertile Gangetic Plains. These plains have played a crucial role in India's history and civilization, nourished by rivers originating from the Himalayas.

The Ganga, Indus, and Brahmaputra river systems, along with their tributaries, enrich the soil with minerals, making the region highly fertile and ideal for agriculture. The rivers also provide water and are a source for generating electricity. A large proportion of India's population lives in these plains.

The flat land has allowed for the development of an elaborate transportation network with roads and railways facilitating the movement of people and goods. The Ganga, Brahmaputra, and other rivers have been used for travel and trade for millennia.

Example

The concentration of lighting in satellite images of the Gangetic plains indicates a high population density and widespread human activity.

Note

Most rivers in India are named after goddesses, such as Ganga, Yamuna, and Kaveri. However, Brahmaputra means 'the son of Brahma'.

The Great Indian Desert or Thar Desert

Moving westward, the yellowish area on the map indicates the Thar Desert, characterized by:

Vast stretches of golden dunes
Rugged terrain
A wide-open sky

Sand dunes are formed by wind shifting and shaping the sand into hill-like formations, sometimes rising up to 150 meters.

The Thar is a vast arid region, mostly within India, spanning the states of:

Rajasthan
Gujarat
Punjab
Haryana

The desert acts as a natural barrier due to harsh conditions, including:

Very high daytime temperatures
Cold nights
Lack of access to water

People living in the Thar have adapted their way of life to the desert conditions, including their:

Food habits
Clothing
Lifestyle

Example

Water is scarce in the desert. Women often travel long distances to fetch water. Traditional cleaning methods involve scouring utensils with sand, and rinse water is reused for watering plants.

Rajasthan is famous for its water conservation methods, including taanka or kunds, which are special water collection systems that store rainwater for drinking.

The Aravalli Hills

Tracing a path eastward from the Thar Desert, we find the Aravalli Hills, among the oldest mountains in the world (approximately 2.5 billion years old).

The range has many peaks and ridges. Its highest peak, Mount Abu, towers at over 1700 m, but most hills range between 300 and 900 meters high.

The Aravallis span the states of:

Delhi
Rajasthan
Haryana
Gujarat

The Aravallis play a vital role in shaping the geography and climate of northwestern India, acting as a natural barrier preventing the Thar Desert from expanding eastward.

Rich in minerals like marble, granite, zinc, and copper, the Aravallis have supported mining and construction for centuries. Ancient mines at Zawar show that Indians were the first to master zinc extraction over eight centuries ago. Historic forts like Chittorgarh, Kumbhalgarh, and Ranthambore are located here.

The Peninsular Plateau

A plateau is a landform that rises from the surrounding land with a flat surface and steep slopes.

India's most important plateau is the triangular peninsular area in the middle and south of the country. As it is surrounded by water on three sides (the Arabian Sea, the Bay of Bengal, and the Indian Ocean), it is called a peninsular plateau.

The plateau is bordered by the Western Ghats and Eastern Ghats. The Western Ghats are taller and run along the western coast, featuring waterfalls during the monsoon season. The Eastern Ghats are lower and broken into smaller hills along the eastern coast. Between these ranges lies the Deccan Plateau, a vast area of flat highlands.

Rivers like the Godavari, Krishna, and Kaveri flow across the plateau from west to east, providing water for farming and millions of people.

The plateau is rich in:

Minerals
Forests
Fertile land

This makes it vital for India's economy. It tilts eastward, so rivers flow towards the Bay of Bengal. Rivers like the Godavari, Krishna, and Mahanadi provide water for:

Farming
Industries
Hydroelectric power

There are also west-flowing rivers (Narmada, Tapti) that drain into the Arabian Sea.

Dense forests on the plateau are home to tribal communities, including:

Santhal
Gond
Baiga
Bhil
Korku

These tribes have distinct languages, traditions, and ways of life closely connected to nature.

Note

Plateaus are home to many waterfalls, which attract tourists and help in hydroelectric power generation and irrigation.

Example

The Western Ghats are a UNESCO World Heritage Site, known as the Sahyadri Hills, and are home to many rivers and a rich biodiversity.

Note

The use of coal, a fossil fuel found in the plateau, contributes to global warming.

India's Amazing Coastlines

India's coastline features:

Beautiful beaches
Rocky cliffs
Lush green forests

The Indian coastline is over 7,500 km long.

Note

Deltas are landforms formed at the mouth of a river when it deposits sediments into a larger body of water. The Godavari, Krishna, Kaveri and Mahanadi rivers create fertile deltas, making the land ideal for farming.

The West Coast of India

The West Coast stretches from Gujarat to Kerala, passing through:

Maharashtra
Goa
Karnataka

Most rivers here originate in the Western Ghats, flow swiftly, and form estuaries. The coastline is shaped by alluvial deposits from short rivers and features coves, creeks, and estuaries, with the Narmada and Tapti estuaries being the largest.

The west coast has many important ports and cities, which have been centers 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 has wide plains and major river deltas, including:

Mahanadi
Godavari
Krishna
Kaveri

Important water bodies like Chilika Lake and Pulicat Lake (a lagoon, separated from larger bodies of water by a natural barrier) are found here.

Indian Islands

The Indian Islands are scattered across the:

Indian Ocean
Arabian Sea
Bay of Bengal

They form part of India's territory. India has two major island groups:

Lakshadweep in the Arabian Sea
Andaman and Nicobar Islands in the Bay of Bengal

These islands have:

Unique wildlife
Beautiful beaches
Coral reefs
Volcanoes

Several ancient tribes made these islands their home tens of thousands of years ago.

Lakshadweep islands

Lakshadweep is an archipelago (a group of islands) in the Arabian Sea, near the Malabar coast of Kerala. It consists of 36 coral islands, not all inhabited. India controls a vast marine area, allowing for fishing, resource exploration, and environmental protection.

Andaman and Nicobar islands

This archipelago comprises more than 500 volcanic islands, divided into the Andaman and Nicobar Islands. Their location is strategically important.

Note

Barren Island in the Andaman and Nicobar Islands is the only active volcano in India.

The Andaman Islands also hold historical significance, as many freedom fighters were jailed there in the 'Cellular Jail'.

The Delta in West Bengal and the Sundarbans

Traveling from the islands towards the eastern side of the Himalayas via the Bay of Bengal, we reach the Sundarbans. This is located in the delta of the Ganga, Brahmaputra, and their tributaries. This delta combines the river, sea, and land. About half of it is located in India, and the rest is in Bangladesh. This is also a UNESCO Heritage site. The Sundarbans are home to many species, including the Royal Bengal Tiger.

The hills of the Northeast

Moving towards the hills of the Northeast, we find the Garo, Khasi, and Jantia hills on the Meghalaya Plateau. These hills are known for their:

Lush greenery
Heavy rainfall
Breathtaking waterfalls

This region experiences high rainfall, making it rich in:

Forests
Unique wildlife
Fertile land

Example

Mawlynnong Village in Meghalaya is renowned as the 'cleanest village in Asia', famous for its cleanliness, bamboo dustbins, and eco-friendly practices. The village is also known for its living root bridges, created by weaving tree roots over many years.

Geographical Diversity of IndiaClass 7 Social Science Notes

Geographical Diversity of India

The Himalayas

How the Himalayas were formed

Three Main Himalayan Ranges

The cold desert of India

The Gangetic Plains

The Great Indian Desert or Thar Desert

The Aravalli Hills

The Peninsular Plateau

India's Amazing Coastlines

The West Coast of India

The East Coast

Indian Islands

Lakshadweep islands

Andaman and Nicobar islands

The Delta in West Bengal and the Sundarbans

The hills of the Northeast