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Q1 Choose the right answer from the four alternatives given below.
(i) Which one of the following describes the drainage patterns resembling the branches of a tree?
(a) Radial (c) Centrifugal
(b) Dendritic (d) Trellis(ii) In which of the following states is the Wular lake located?
(a) Rajasthan (c) Punjab
(b) Uttar Pradesh (d) Jammu and Kashmir
(iii) The river Narmada has its source at
(a) Satpura (c) Amarkantak
(b) Brahmagiri (d) Slopes of the Western Ghats
(iv) Which one of the following lakes is a salt water lake?
(a) Sambhar (c) Wular
(b) Dal (d) Gobind Sagar
(v) Which one of the following is the longest river of the Peninsular India?
(a) Narmada (c) Godavari
(b) Krishna (d) Mahanadi
(vi) Which one amongst the following rivers flows through a rift valley?
(a) Mahanadi (c) Krishna
(b) Tungabhadra (d) TapiAns: (i) (c) Dendritic
(ii) (d) Jammu and Kashmir
(iii) (b) Amarkantak
(iv) (a) Sambhar
(v) (b) Godavari
(vi) (d) Tapi
Q2 Answer the following questions briefly.
(i) What is meant by a water divide? Give an example.
(ii) Which is the largest river basin in India?
(iii) Where do the rivers Indus and Ganga have their origin?
(iv) Name the two headstreams of the Ganga. Where do they meet to form the Ganga?
(v) Why does the Brahmaputra in its Tibetan part have less silt, despite a longer course?
(vi) Which two Peninsular rivers flow through trough?
(vii) State some economic benefits of rivers and lakes.Ans: (i) Any upload or a mountain that separates two adjoining drainage basins is called as water divide. An example of water divide: the western ghats.
(ii) The ganga river basin is the largest river basin in India.
(iii) The Indus river has its origin in Tibet near the mansarovar lake while the ganga river has its origin in gangotri glacier in Uttaranchal.
(iv) Alaknanda and Bhagirathi are the two headstreams of the ganga. They both meet to form the ganga at devprayag.
(v) `The Brahmaputra river that is known as tsangpo in the Tibet receives very little amount of water in Tibet, so it carries little silt. But once it enters India, brahmputra is fed by heavy rains and carries lot of water and silt.
(vi) The two rivers which flows through troughs are narmada and tapi; forms estuaries while entering the sea.
(vii) River is very beneficial for agricultural purposes and generating hydro electricity. It provides fisheries inland channels for transport. Lakes like the sambhar lake provides edible salt. Rgey also helps in the development of tourism and provided recreation.
Q3 Below are given names of a few lakes of India. Group them under two categories – natural and created by human beings.
(a) Wular (b) Dal
(c) Nainital (d) Bhimtal
(e) Gobind Sagar (f) Loktak
(g) Barapani (h) Chilika
(i) Sambhar (j) Rana Pratap Sagar
(k) Nizam Sagar (l) Pulicat
(m) Nagarjuna Sagar (n) HirakundAns: (a) Wular: Natureal (b) Dal: Natureal
(c) Nainital: Natureal (d) Bhimtal: Natureal
(e) Govind Sagar: Human beings (f) Loktak: Natureal
(g) Barapani: Natureal (h) Chilika: Natureal(i) Sambhar : Natureal (j) Rana Pratap Sagar: Human beings
(k) Nizam Sagar: Human beings (l) Pulicat : Natureal(m) Nagarjuna Sagar: Human beings (n) Hirakund:Human Beings
Q4 Discuss the significant difference between the Himalayan and the Peninsular rivers.
Ans: 
Q5 Compare the east flowing and the west flowing rivers of the Peninsular plateau.
Ans: 
Q6 Why are rivers important for the country’s economy?
Ans: The rivers are important for the country economy because: rivers are the source of natural fresh water which is required for the survival of most of the animals including the human beings. The water from the rivers is used for several domestic, industrial and agricultural purposes. The presence of rivers boosts the trade and commerce by helping in the easy transport of goods. They are also the potential sources of energy. The water from rivers is used for running hydro-electric dams and is also used for navigation and transport thus, important for commercial activities also. It also provides fishing and great scenic and recreational value. Thus, serves as good tourist spots.
Drainage Question Answers: NCERT Class 9 Social Science - Contemporary India
Welcome to the Chapter 3 - Drainage, Class 9 Social Science - Contemporary India - NCERT Solutions page. Here, we provide detailed question answers for Chapter 3 - Drainage.The page is designed to help students gain a thorough understanding of the concepts related to natural resources, their classification, and sustainable development.
Our solutions explain each answer in a simple and comprehensive way, making it easier for students to grasp key topics and excel in their exams. By going through these Drainage question answers, you can strengthen your foundation and improve your performance in Class 9 Social Science - Contemporary India. Whether you're revising or preparing for tests, this chapter-wise guide will serve as an invaluable resource.
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Exercise 1 ( Page No. : 23 )
Key Features of NCERT Class 9 Social Science - Contemporary India Chapter 'Drainage' question answers :
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Popular Questions of Class 9 Social Science - Contemporary India
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Write short notes on the following.
(i) The Indian Desert
(ii) The Central Highlands
(iii) The Island groups of India - Q:-
Describe the regional variations in the climatic conditions of India with the help of suitable examples.
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Give reasons as to why.
(i) Seasonal reversal of wind direction takes place over the Indian subcontinent?
(ii) The bulk of rainfall in India is concentrated over a few months.
(iii) The Tamil Nadu coast receives winter rainfall.
(iv) The delta region of the eastern coast is frequently struck by cyclones.
(v) Parts of Rajasthan, Gujarat and the leeward side of the Western Ghats are drought-prone. - Q:-
Why does the rainfall decrease from the east to the west in Northern India.
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Name different types of Vegetation found in India and describe the vegetation of high altitudes.
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The central location of India at the head of the Indian Ocean is considered of great significance. Why?
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Answer the following questions briefly.
(i) What are the controls affecting the climate of India?
(ii) Why does India have a monsoon type of climate?
(iii) Which part of India does experience the highest diurnal range of temperature and why?
(iv) Which winds account for rainfall along the Malabar coast?
(v) What are Jet streams and how do they affect the climate of India?
(vi) Define monsoons. What do you understand by “break” in monsoon?
(vii) Why is the monsoon considered a unifying bond? - Q:-
Give the characteristics and effects of the monsoon rainfall in India.
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Describe how the Himalayas were formed.
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Discuss the mechanism of monsoons.
Recently Viewed Questions of Class 9 Social Science - Contemporary India
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Give an account of the Northern Plains of India.
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Answer the following questions briefly.
(i) What are tectonic plates?
(ii) Which continents of today were part of the Gondwana land?(iii) What is the bhabar?
(iv) Name the three major divisions of the Himalayas from north to south.
(v) Which plateau lies between the Aravali and the Vindhyan ranges?
(vi) Name the island group of India having coral origin. - Q:-
Describe the regional variations in the climatic conditions of India with the help of suitable examples.
- Q:-
Give reasons as to why.
(i) Seasonal reversal of wind direction takes place over the Indian subcontinent?
(ii) The bulk of rainfall in India is concentrated over a few months.
(iii) The Tamil Nadu coast receives winter rainfall.
(iv) The delta region of the eastern coast is frequently struck by cyclones.
(v) Parts of Rajasthan, Gujarat and the leeward side of the Western Ghats are drought-prone. - Q:-
Describe how the Himalayas were formed.
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Why does the rainfall decrease from the east to the west in Northern India.
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Why has India a rich heritage of flora and fauna?
- Q:-
Answer the following questions briefly.
(i) What is meant by a water divide? Give an example.
(ii) Which is the largest river basin in India?
(iii) Where do the rivers Indus and Ganga have their origin?
(iv) Name the two headstreams of the Ganga. Where do they meet to form the Ganga?
(v) Why does the Brahmaputra in its Tibetan part have less silt, despite a longer course?
(vi) Which two Peninsular rivers flow through trough?
(vii) State some economic benefits of rivers and lakes. - Q:-
Write short notes on the following.
(i) The Indian Desert
(ii) The Central Highlands
(iii) The Island groups of India - Q:-
(i) Migrations change the number, distribution and composition of the population in
(a) the area of departure (c) both the area of departure and arrival
(b) the area of arrival (d) none of the above
(ii) A large proportion of children in a population is a result of
(a) high birth rates (c) high death rates
(b) high life expectancies (d) more married couples
(iii) The magnitude of population growth refers to
(a) the total population of an area
(b) the number of persons added each year
(c) the rate at which the population increases
(d) the number of females per thousand males
(iv) According to the Census 2001, a “literate” person is one who
(a) can read and write his/her name
(b) can read and write any language
(c) is 7 years old and can read and write any language with understanding
(d) knows the 3 ‘R’s (reading, writing, arithmetic)
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