Class 9 Social Science — Chapter 5: NATURAL VEGETATION AND WILDLIFE

Understand India's position as one of the world's 12 mega bio-diversity countries. Learn the definitions of natural vegetation, virgin vegetation, flora, fauna, and the distinction between endemic (indigenous) and exotic species.

Identify the climatic conditions (over 200 cm rainfall), geographical locations (Western Ghats, Andaman & Nicobar), and key characteristics (multilayered, green year-round) of Tropical Evergreen Forests. Know the important flora (ebony, mahogany, rosewood) and fauna (elephants, monkey, lemur).

Understand why these are the most widespread forests in India, also known as 'monsoon forests'. Differentiate between moist deciduous (100-200cm rainfall) and dry deciduous (70-100cm rainfall) forests based on rainfall, location, and key tree species like Teak and Sal.

Learn about the vegetation in arid regions with less than 70cm of rainfall. Understand plant adaptations to conserve water, such as long roots, succulent stems, and small leaves. Identify key plant species (Acacias, Cacti) and animals (camel, wild ass).

Understand how natural vegetation changes with increasing altitude in mountainous areas. Identify the different vegetation belts: wet temperate, temperate (coniferous), and Alpine vegetation, along with their characteristic trees (Oaks, Pine, Deodar) and animals (Kashmir stag, snow leopard, yak).

Learn about the tidal forests found in coastal deltas. Understand their unique feature of having submerged roots to adapt to tidal conditions. Identify key locations (Sundarbans), important trees (Sundari), and the famous fauna like the Royal Bengal Tiger.

Gain an overview of India's rich faunal diversity. Learn the specific habitats of key animals like the Indian lion (Gir), tigers, elephants, and one-horned rhinoceroses. Understand the importance of the Wildlife Protection Act implemented in 1972.

Recognize India's ancient heritage of using plants for medicinal purposes. Identify the uses of common medicinal plants such as Sarpgandha (blood pressure), Jamun (diabetes), Neem (antibiotic), and Tulsi (cough/cold).