Introduction:
Geography is the study of the Earth's physical features and the atmosphere. In Class 9, students learn about different aspects of geography, including the physical features of the Earth, climate, vegetation, and more.

Chapter 2: Physical Features of India

1. The Northern Mountains:
- The Himalayas are the tallest mountain range in the world.
- They act as a natural barrier protecting India from the cold winds of Central Asia.

2. The Northern Plains:
- The Indo-Gangetic Plain is a fertile region formed by the rivers Ganges, Yamuna, and Brahmaputra.
- It is an important agricultural region in India.

3. The Peninsular Plateau:
- The Deccan Plateau is a large, elevated region in southern India.
- It is rich in minerals and has a diverse range of flora and fauna.

4. The Coastal Plains:
- India has two coastal plains - the Western Coastal Plain along the Arabian Sea and the Eastern Coastal Plain along the Bay of Bengal.
- These plains are important for trade and commerce.

5. The Islands:
- India has two groups of islands - the Andaman and Nicobar Islands in the Bay of Bengal, and the Lakshadweep Islands in the Arabian Sea.
- These islands are known for their biodiversity and marine life.

Conclusion:
Understanding the physical features of India is essential for understanding its diverse landscapes, climate, and natural resources. By studying these features, students can gain a deeper appreciation for the geographical diversity of their country.