Chapter 1: Geographical Diversity of India-Details Notes Social Science Part-1 Class 7 In English-CBSE Notes
Explore NCERT Solutions for Class 7 social science part-1 Chapter Chapter 1: Geographical Diversity of India Topic Details Notes with simple explanations and free ncert solution in English.
Chapter 1: Geographical Diversity of India-Details Notes Social Science Part-1 Class 7 In English-CBSE Notes
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Chapter 1: Geographical Diversity of India-Details Notes Social Science Part-1 Class 7 In English-CBSE Notes
Chapter 1: Geographical Diversity of India
Details Notes
Chapter 1: Geographical Diversity of India
Introduction
India is the seventh-largest country in the world and an important part of Asia. Due to its vast size and varied physical features, India is often called a "Mini-Continent". The country has mountains, plains, deserts, plateaus, coastlines, and islands, creating great geographical diversity.
Major Physical Divisions of India
- The Himalayas
- The Northern (Gangetic) Plains
- The Great Indian Desert (Thar Desert)
- The Peninsular Plateau
- The Coastal Plains
- The Islands
- The Hills of Northeast India
The Himalayas
The Himalayas form a massive mountain barrier in the north of India. They stretch for about 2,500 km and are among the youngest fold mountains in the world.
Importance of the Himalayas
- Protect India from cold winds of Central Asia.
- Act as a natural boundary.
- Source of major rivers like the Ganga, Indus, and Brahmaputra.
- Provide water for agriculture, industries, and daily use.
- Rich in biodiversity.
- Important religious and cultural centres.
Three Ranges of the Himalayas
- Himadri (Greater Himalayas): Highest range, permanently snow-covered.
- Himachal (Lesser Himalayas): Famous hill stations such as Shimla, Nainital, and Darjeeling.
- Shivalik: Lowest range with forests and wildlife.
Interesting Fact
The word "Himalaya" comes from Sanskrit words Hima (snow) and Alaya (abode), meaning "Abode of Snow".
Formation of the Himalayas
Millions of years ago, the Indian landmass moved northwards and collided with the Eurasian landmass. This collision folded the Earth's crust and formed the Himalayas. The mountains are still growing slowly today.
The Cold Desert of India – Ladakh
Ladakh is known as the Cold Desert of India.
- Winter temperature falls below -30°C.
- Very little rainfall.
- Rocky landscape and deep valleys.
- Famous lake: Pangong Tso.
- Home to snow leopards, yaks, and Tibetan antelopes.
- Known for monasteries and festivals like Losar and Hemis.
The Gangetic Plains
The Gangetic Plains are formed by the rivers Ganga, Indus, Brahmaputra, and their tributaries.
Features
- Extremely fertile soil.
- Densely populated region.
- Suitable for agriculture.
- Well-developed transport network.
- Important centre of trade and civilisation.
Main Crops
- Rice
- Wheat
- Sugarcane
- Pulses
The Great Indian Desert (Thar Desert)
The Thar Desert lies mainly in Rajasthan and extends into Gujarat, Punjab, and Haryana.
Features
- Hot days and cold nights.
- Low rainfall.
- Sand dunes formed by wind.
- Scarcity of water.
- People adapt their lifestyle to desert conditions.
Water Conservation
Traditional methods such as Taanka and Kunds are used to collect and store rainwater.
The Aravalli Hills
The Aravallis are among the oldest mountain ranges in the world.
Importance
- Prevent the spread of the Thar Desert towards the east.
- Rich in minerals such as copper, zinc, marble, and granite.
- Home to famous forts like Chittorgarh and Kumbhalgarh.
The Peninsular Plateau
The Peninsular Plateau is a triangular plateau located in central and southern India.
Features
- Very old landmass.
- Surrounded by water on three sides.
- Bounded by Western Ghats and Eastern Ghats.
- Rich in minerals and forests.
- Important for agriculture and industries.
Major Rivers
- Godavari
- Krishna
- Kaveri
- Mahanadi
- Narmada
- Tapti
Tribal Communities
- Gond
- Santhal
- Baiga
- Bhil
- Korku
Western Ghats and Eastern Ghats
Western Ghats
- Higher and continuous mountain range.
- UNESCO World Heritage Site.
- Rich biodiversity.
- Numerous waterfalls.
Eastern Ghats
- Lower and discontinuous hills.
- Broken into smaller ranges.
- Border the eastern coast.
India's Coastlines
India has a coastline of more than 7,500 km.
West Coast
- Stretches from Gujarat to Kerala.
- Contains estuaries.
- Important ports and cities.
- Major economic activities.
East Coast
- Located between Eastern Ghats and Bay of Bengal.
- Wide coastal plains.
- Large river deltas.
- Chilika Lake and Pulicat Lake are important water bodies.
Deltas
Deltas are formed when rivers deposit sediments near their mouths.
Major deltas:
- Godavari Delta
- Krishna Delta
- Kaveri Delta
- Mahanadi Delta
- Ganga-Brahmaputra Delta
Indian Islands
Lakshadweep Islands
- Located in the Arabian Sea.
- Consists of coral islands.
- Rich marine biodiversity.
Andaman and Nicobar Islands
- Located in the Bay of Bengal.
- More than 500 islands.
- Strategically important.
- Home to Cellular Jail.
- Barren Island has India's only active volcano.
The Sundarbans Delta
The Sundarbans lies in the Ganga-Brahmaputra delta.
- Largest mangrove forest in the world.
- UNESCO World Heritage Site.
- Home of the Royal Bengal Tiger.
The Hills of Northeast India
The hills of Northeast India include the Garo, Khasi, and Jaintia Hills.
Features
- Heavy rainfall.
- Dense forests.
- Beautiful waterfalls.
- Living Root Bridges.
- Rich biodiversity.
Mawlynnong Village
Mawlynnong in Meghalaya is known as the "Cleanest Village in Asia". It is famous for cleanliness, eco-friendly practices, and living root bridges.
Key Terms
- Peninsula: Land surrounded by water on three sides.
- Plateau: Elevated flat land.
- Delta: Landform formed by river deposits near its mouth.
- Estuary: River mouth where freshwater mixes with seawater.
- Archipelago: Group of islands.
- Coral Reef: Underwater structure formed by marine organisms.
Chapter Summary
India possesses immense geographical diversity with mountains, plains, deserts, plateaus, coasts, islands, and forests. These physical features influence climate, agriculture, economy, biodiversity, culture, and human life. This diversity is one of the main reasons India is called a "Mini-Continent".
All Topics Chapter Chapter 1: Geographical Diversity of India
Chapter 1: Geographical Diversity of India-Details Notes Social Science Part-1 Class 7 In English-CBSE Notes
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