CBSE Study Material Based on NCERT

Course: CBSE Class 6 – General Knowledge

Unit 1: India – Our Country

Lesson: Rivers, Mountains, Plains, and Plateaus

Study Module

Introduction

India is a land of great physical diversity. Its surface features include lofty mountains, long rivers, vast plains, ancient plateaus, and coastal regions. These physical features influence the climate, vegetation, wildlife, agriculture, and human settlement patterns of the country. Understanding India’s rivers, mountains, plains, and plateaus helps us understand how nature shapes life in India.

Mountains of India

Mountains are large natural elevations of the Earth’s surface. They play an important role in determining climate, rainfall, and river systems.

The Himalayan Mountains

• The Himalayas are the highest mountain range in the world.
• They lie in the northern part of India.
• They form a natural barrier protecting India from cold winds from Central Asia.
• Many important rivers such as the Ganga, Yamuna, and Brahmaputra originate here.

Importance of Mountains

• Source of rivers
• Help in rainfall by blocking monsoon winds
• Home to rich forests and wildlife
• Natural boundaries for the country

Rivers of India

Rivers are flowing bodies of water that provide fresh water for drinking, irrigation, and other uses.

Himalayan Rivers

• These rivers are perennial, meaning they flow throughout the year.
• They are fed by rainwater and melting snow.
• Examples include the Ganga, Yamuna, and Brahmaputra.

Peninsular Rivers

• These rivers depend mainly on rainfall.
• They flow for a shorter period compared to Himalayan rivers.
• Examples include the Godavari, Krishna, Narmada, and Kaveri.

Importance of Rivers

• Provide water for agriculture
• Support industries
• Help in transportation
• Support life and settlements

Plains of India

Plains are flat and low-lying areas.

The Northern Plains

• Formed by the deposition of silt brought by rivers.
• Stretch across northern India.
• Very fertile and suitable for agriculture.

Importance of Plains

• High population density
• Easy transport and communication
• Major agricultural regions

Plateaus of India

A plateau is a raised flat land.

The Peninsular Plateau

• One of the oldest landforms of India
• Rich in minerals like coal, iron, and manganese
• Surrounded by hills and rivers

Importance of Plateaus

• Mineral resources
• Support industries
• Some areas are suitable for farming

Conclusion

India’s physical features are closely connected. Mountains give rise to rivers, rivers form plains, and plateaus supply minerals. Together, they shape India’s natural environment and influence the lives of its people.

Questions and Answers

1. What are physical features?

Physical features are natural landforms such as mountains, rivers, plains, and plateaus.

2. Why are the Himalayas important for India?

They protect India from cold winds, cause rainfall, and are the source of many rivers.

3. Name two Himalayan rivers.

Ganga and Yamuna.

4. What is a perennial river?

A river that flows throughout the year.

5. Why are Himalayan rivers perennial?

Because they are fed by melting snow and rainfall.

6. Name two Peninsular rivers.

Godavari and Krishna.

7. How are plains formed?

Plains are formed by the deposition of silt by rivers.

8. Why are the Northern Plains fertile?

Due to fine alluvial soil deposited by rivers.

9. What is a plateau?

A raised flat area of land.

10. Name the major plateau of India.

The Peninsular Plateau.

11. Which physical feature is rich in minerals?

Plateaus.

12. Why are rivers important for agriculture?

They provide water for irrigation.

13. How do mountains influence climate?

They block winds and cause rainfall.

14. Which landform supports dense population?

Plains.

15. What is alluvial soil?

Soil deposited by rivers.

16. Why are Peninsular rivers seasonal?

They depend mainly on rainfall.

17. How do rivers help in transportation?

They provide natural waterways.

18. Which region has older rocks: Himalayas or Peninsular Plateau?

Peninsular Plateau.

19. Name one benefit of mountains.

They are sources of rivers.

20. How do physical features affect human life?

They influence farming, settlement, climate, and occupation.

Multiple Choice Questions (MCQs)

1. Which is the highest mountain range in India?

a) Aravalli
b) Vindhya
c) Himalayas
d) Satpura

Answer: c) Himalayas
Explanation: The Himalayas are the highest mountain range in the world.

2. Which river is perennial?

a) Godavari
b) Krishna
c) Ganga
d) Mahi

Answer: c) Ganga
Explanation: The Ganga flows throughout the year.

3. The Northern Plains are formed by:

a) Lava
b) Wind
c) Glaciers
d) River deposition

Answer: d) River deposition
Explanation: Rivers deposit alluvial soil forming plains.

4. Which landform is rich in minerals?

a) Plains
b) Plateaus
c) Valleys
d) Deserts

Answer: b) Plateaus
Explanation: Plateaus contain mineral resources.

5. Peninsular rivers depend mainly on:

a) Snow
b) Glaciers
c) Rainfall
d) Groundwater

Answer: c) Rainfall
Explanation: These rivers are rain-fed.

6. Which soil is best for farming?

a) Sandy
b) Alluvial
c) Rocky
d) Desert

Answer: b) Alluvial
Explanation: Alluvial soil is very fertile.

7. Which physical feature protects India from cold winds?

a) Plateau
b) Plains
c) Rivers
d) Himalayas

Answer: d) Himalayas
Explanation: The Himalayas act as a natural barrier.

8. Which river flows eastwards?

a) Narmada
b) Tapi
c) Godavari
d) Luni

Answer: c) Godavari
Explanation: Godavari flows towards the Bay of Bengal.

9. Which landform supports dense population?

a) Mountains
b) Plains
c) Plateaus
d) Deserts

Answer: b) Plains
Explanation: Flat and fertile plains attract settlements.

10. Which is the oldest landform of India?

a) Himalayas
b) Northern Plains
c) Peninsular Plateau
d) Coastal Plains

Answer: c) Peninsular Plateau
Explanation: It is made of ancient rocks.

11. Rivers help in:

a) Irrigation
b) Transport
c) Industry
d) All of these

Answer: d) All of these
Explanation: Rivers support many human activities.

12. Which river flows westwards?

a) Ganga
b) Brahmaputra
c) Narmada
d) Yamuna

Answer: c) Narmada
Explanation: Narmada flows into the Arabian Sea.

13. What causes rainfall in India?

a) Cold winds
b) Monsoon winds
c) Ocean currents
d) Earth rotation

Answer: b) Monsoon winds
Explanation: Monsoon winds bring rain.

14. Which landform has steep slopes?

a) Plains
b) Plateaus
c) Mountains
d) Valleys

Answer: c) Mountains
Explanation: Mountains have high elevation and steep slopes.

15. The Brahmaputra originates in:

a) Peninsular Plateau
b) Himalayas
c) Northern Plains
d) Coastal Plains

Answer: b) Himalayas
Explanation: It rises in the Himalayan region.

16. Which physical feature helps in mineral-based industries?

a) Plains
b) Rivers
c) Plateaus
d) Deserts

Answer: c) Plateaus
Explanation: Minerals are found mainly in plateaus.

17. Which landform is flat and low-lying?

a) Mountains
b) Plateaus
c) Plains
d) Hills

Answer: c) Plains
Explanation: Plains are flat surfaces.

18. Which river is not a Himalayan river?

a) Ganga
b) Yamuna
c) Brahmaputra
d) Krishna

Answer: d) Krishna
Explanation: Krishna is a Peninsular river.

19. Which feature influences climate most?

a) Rivers
b) Mountains
c) Roads
d) Cities

Answer: b) Mountains
Explanation: Mountains block winds and affect rainfall.

20. Which physical feature supports agriculture the most?

a) Mountains
b) Deserts
c) Plains
d) Hills

Answer: c) Plains
Explanation: Fertile soil and flat land support farming.

This study material is strictly aligned with the NCERT syllabus and is fully suitable for CBSE Class 6 examinations.