3rd week assignment

CLASS- IX Geography

MAJOR PHYSIOGRAPHIC DIVISIONS OF INDIA

(1) The Himalayan Mountains

(2) The Northern Plains

(3) The Peninsular Plateau

(4) The Indian Desert

(5) The Coastal Plains

(6) The Islands

The Himalayan Mountains

East west extensions -2400km

Their width varies from 400 Km in jammu and kashmir to 150 km in Arunachal Pradesh.

Longitudinal division of Himalaya

Himadri : Average height 6000m and are asymmetrical in nature and core made up of granite

Himachal : composed to altered rocks and have an average height of 3700 - 4500 meters and 50km width.

Shiwaliks : Having average height of 900 – 1100 m and width of 10-50 km.

East- West division of Himalayas

Punjab Himalayas : It lies in between indus and sutluj river

Kumaon Himalayas : It lies in between sutluj and kali river.

Nepal Himalayas : It lies in between kali and Tista river.

Assam Himalayas : It lies in between Tista and dihang river.

Northern plain

It is formed by interplay of three major river system namely Ganga , Indus and Brahmaputra along with its tributaries. It spreads over an area of 7 lakh sq km , it is about 2400 km long and 240-300 km broad. As it is formed by interplay of rivers which make it quite fertile with sufficient amount of water.

Distributaries : Splitting of rivers into numerous channels at its lower course are called distributaries.

Division of Northern plain

Punjab plain : It is the western part of the northern plain formed by indus and its tributaries.It mostly lies in Pakistan

Ganga plain : It extends between Ghaggar and Teesta river and spreads over the areas of Haryana, Delhi, Uttar Pradesh, Bihar and partly Jharkhand and West Bengal.

Bhabhar : The river after descending from the mountain deposits pebbles in a narrow belt of about 8-16 km lying parallel to shiwaliks.

Terai : Streams disappears in the bhabhar belt and remerges and create a wet, swampy and Marshy region called Terai.

Bhangar : It consists of the older alluviam that are brought by river and are found away from the coast.

Khadar : It consists of newer alluviam that are brought by river and are found near to the coast.

Home assignment

1. State any three features of Himalayan mountains.

2. name the three sections into which the northern plain has been divided ? Write one feature of each .

3. State any three differences between the Himadri range and shivalik range .

4. Describe any three features of Northern plains

5. Which are the major physiographic division of India? Contrast the relief of the Himalayan region with that of the Peninsula plateau.