CLASS 9th

SUBJECT: GEOGRAPHY

CHAPTER 6 : POPULATION

MULTIPLE CHOICE QUESTIONS

1. The area drained by a single river is called its ....... .

a) Drainage System

b) Drainage

c) Drainage Basin

d) None Of The Above

2. Which of the following describes drainage patterns resembling branches of a tree?

a) Trellis

b) Centrifugal

c) Dendritic

d) Rectangular

3. Which of the following river system is not included in the Himalayan River system ?

a) The Indus River System

b) The Brahmaputra River System

c) The Ganga River System

d) None Of The Above

4. The headwaters of Ganga is known as ........ .

a) Gangotri

b) Yamuna

c) Bhagirathi

d) None of the above

5. What is the total length of the Ganga ?

a) 1600km

b) 2500km

c) 3200km

d) 3500 km

6. Which of the following river is the longest tributary of the Ganga ?

a) Yamuna

b) Petwa

c) Son

d) Gandhak

7. Which of the following is the initial name of Brahmaputra when it enters in Nepal ?

a) Meghna

b) Dihang

c) Tasangpo

d) Jamuna

8. According to the Peninsular River system which of the following two rivers drain into

Arabian Sea after making estuaries ?

a) Narmada and Tapi

b) Krishna and Kaveri

c) Narmada and Godavari

d) Mahanadi and Kaveri

9. According to the Indus water treaty, what percent of total water can India use from the

Indus river?

a) 20%

b) 45%

c) 30%

d) 50%

10. Which of the following river does not contribute in the formation of the Sundarban Delta ?

a) The Yamuna

b) The Ganga

c) The Brahmaputra

d) None Of The Above

11. Which of the following rivers does not originate from the north of the mountain ranges.

a) The Ganga

b) The Brahmaputra

c) The Indus

d) None of the above

12. Which one of the following river is known as the ‘Dakshin Ganga’?

a) The Narmada

b) The Godavari

c) The Krishna

d) The Tapi

13. Where is the largest salt water lake of India situated ?

a) Maharashtra

b) Orrisa

c) Madhya Pradesh

d) Rajasthan

14. Which of the following river system flows parallel to the Himalayan range ?

a) Indus River System

b) Ganga River System

c) Brahmaputra River System

d) None of the above

15. Which of the following lakes originates from the glaciers ?

a) Fresh Water Lakes

b) Salt Water Lakes

c) Ox-Bow Lakes

d) Artificial Lakes

e)

16. Which among the following rivers flows through a rift valley ?

a) Tapi

b) Krishna

c) Godavari

d) Mahanadi

17. Which of the following rivers has the largest drainage pattern in India ?

a) The Indus

b) The Ganga

c) The Brahmaputra

d) The Mahanadi

18. To which of these places does the Shivasamudram waterfall not provide hydroelectric

power ?

a) Bangalore

b) Mysore

c) Ooty

d) Kolar Gold Fields

19. "The river system of an area" -give one word that defines this statement.

a) Basin

b) Water Divide

c) Drainage

d) Bank

20. Which kind of drainage pattern is formed when tributaries join rivers almost at the right

angles ?

a) Dendritic Drainage

b) Trellis Drainage

c) Rectangular Drainage

d) Radial Drainage

QUESTIONS ANSWERS

1 c

2 c

3 d

4 c

5 b

6 a

7 c

8 a

9 a

10 a

11 c

12 b

13 d

14 c

15 a

16 a

17 b

18 c

19 c

20 b

CLASS 9th

SUBJECT: GEOGRAPHY

CHAPTER 3: DRAINAGE

VERY SHORT ANSWER TYPE QUESTIONNS

Q1. What do you mean by drainage basin ?

A1. The area drained by a single River system is known as drainage basin.

Q2. Name the world's largest drainage basin ?

A2. The Amazon River

Q3. Which river has the largest basin in India?

A3. The Ganga

Q4. Which are the four types of drainage patterns ?

A4. The four types of drainage patterns are :

Dendritic Drainage

Rectangular Drainage

Trellis Drainage

Radial Drainage

Q5. Which drainage pattern looks like branches of roots of a tree ?

A5. Dendritic drainage

Q6. Name the two drainage systems in India ?

A6. The two drainage systems in India are:

Himalayan River system

Peninsular river system.

Q7. What is a river system ?

A7. A river along with its tributaries is called a river system.

Q8. Which river is the longest river of the world ?

A8. The Indus

Q9. Which is the largest peninsular river ?

A9. The Godavari

Q10. What is the other name by which Godavari river know as ?

A10. Dakshin Ganga

Q11. Name the biggest waterfall in India.

A11. Kunchikal Falls, Karnataka

Q12. Name the second biggest waterfall in India.

A12. Jog falls

Q13. Name the largest fresh water lake in India.

A13. The Wular lake

Q14. Where do the river Indus and Ganga have their origin ?

A14. Indus river origin - near Mansarovar lake, Tibet

Ganga river origin - Gangotri glacier in Uttaranchal

Q15. In which state is the Sambhar lake situated ?

A15. Rajasthan

Q16. Which place is located on the water divide between the Indus and the Ganga River system ?

A16. Ambala

Q17. Which type of drainage pattern is made by river Narmada ?

A17. Trellis drainage pattern

Q18. Zaskar and Nubra are important tributaries of which river ?

A18. Indus river

Q19. What does NRCP stands for ?

A19. National River Conservation Plan

Q20. The Narmada basin creates many picturesque location. Name two of them.

A20. The "Marble rocks" near Jabalpur

The "Dhuadhar falls".

CLASS 9th

SUBJECT: GEOGRAPHY

CHAPTER 3 : DRAINAGE (SAQ)

Q1. What is meant by a water divide? Give an example.

A1. A water divide is an elevated area such as upland or mountain which separates two drainage basins.

Q2. Where do the rivers Indus and Ganga have their origin?

A2. The Ganga river originates from Gangotri glacier in Uttaranchal whereas Indus river rises in Tibet, near

Lake Mansarowar.

Q3. Name the two headstreams of the Ganga. Where do they meet to form the Ganga?

A3. Alaknanda and Bhagirathi are the two headstreams of Ganga and they both meet to form Ganga at

Devprayag.

Q4. State some economic benefits of rivers and lakes.

A4. There are several economic benefits of rivers and lakes some of them are

They provided water for irrigation

They also provide water for industrial purpose

They are major source of livelihood and provide of food

Q5. Define drainage basin ?

A5. The area drained by a single river is called a drainage basin.

Q6. Mention the types of drainage patterns ?

A6. There are four type of drainage patterns :

Dendritic Drainage

Rectangular Drainage

Trellis Drainage

Radial Drainage

Q7. Write a short note on the Krishna basin ?

A7. Krishna Basin :

Rising from a spring near mahabaleshwar the Krishna flows about 1400 km and reaches the Bay of

Bengal.

The Tungabhadra, the Koyan, the Ghatprabha, the Musi and the Bhima are some of its tributaries.

Its drainage basin is shared by Maharashtra Karnataka and Andhra Pradesh

Q8. Write some salient features of the Ganga Brahmaputra Delta ?

A8. The salient features of Ganga Brahmaputra Delta are :

It is the largest delta of the world on the mouth of Bay of Bengal.

This has formed on to split of the Gange and the brahmaputra in several river distributaries.

Its lower portion is marshy going to mess up of the sea and freshwater together.

It is the most fertile and densely populated delta

Q9. Why are the peninsular rivers not navigable ?

A9. Peninsular rivers are not navigable because :

These are the seasonal rivers and generally dries up in summer

River beds are uneven, rocky and have sharp slopes.

Construction of dams is difficult as a result of a navigation is not possible.

Q10. Briefly explain NRCP ?

A10. NRCP is the National River Conservation Plan.

The river cleaning program in the country was initiated with the launching of the Ganga action plan

in 1985.

The Ganga action plan was expanded to cover the rivers under the national river conservation plan

NRCP in the year 1995.

The objective of nrcp is to improve the water quality of the rivers which are major source of water in

the country, through the implementation of pollution abatement work.

Q11. In the Himalayan region, where are the most of the freshwater lakes found ?

A11. Most of the freshwater lakes are found in Himalayan region. They are of Glacial origin, in other words

there formed by glaciers dug out a basin which are later filled with snow melt. The Wular lake in Jammu

and Kashmir, is the result of the tectonic activities. It is the largest freshwater lake in India. The Dal Lake,

the Nainital, Loktal and the Barapani are some of other important freshwater lakes.

Q12. Name the three Himalayan River systems and give two tributaries of each ?

A12. The three Himalayan River system are :

The Indus River System

The Ganga River System

The Brahmaputra River System

Tributaries of Himalayan River system are :

Indus River System - Satluj And Beas

Ganga River System - Yamuna And Brahmaputra

Bhramaputra River System - Dibang And Lohit

Q13. Which river is known as Dakshin Ganga ? Describe its main feature ?

A13. The Godavari river is known as Dakshin Ganga.

The main features of river Godavari are :

It is the largest peninsular river which rises from the slopes of Western ghats in the Nashik district of

Maharashtra.

Its length is about 1500 Km that drain into the Bay of Bengal.

Number of tributaries join the Godavari river such as the Purna, the Wardha, the Penganga, the

Manjira, the Ganga and the Pranhita.

Q14. How is the Sundarban Delta formed ?

A14. When Ganga flows towards east words till Farakka in West Bengal, here the river splits into Bhagirathi

- Hooghly flows southwards through the deltaic plains to the Bay of Bengal. the mainstream flows

southwards into Bangladesh and is joined by Brahmaputra further downstream, it is known as the Meghna.

this mighty river, with waters froms the Ganga and the Brahmaputra flows into the Bay of Bengal. The Delta

formed by these rivers is known as Sunderban Delta. Sunderban Delta derived its name from the sundari tree

which grows well in marshland it is the world's largest and fastest growing delta.

CLASS 9th

SUBJECT: GEOGRAPHY

CHAPTER 3: DRAINAGE

LONG ANSWER TYPE QUESTIONS

Q1. Define drainage and explain the various patterns with diagrams?

A1. The term drainage describes a River system of an area. That area drained by a single River system is

called a drainage basin. The streams of the rivers within drainage basin from the drainage pattern.

There are many four types of drainage pattern :

1. Dendritic Drainage

2. Rectangular Drainage

3. Trellis Drainage

4. Radial Drainage

1. Dendritic drainage - It is formed when the main river is joined by a number of streams that look like the

branches of roots of a tree.

2. Rectangular drainage - It is formed when the main river is joined by number of streams after flowing

parallel to it and then joining the main river at a right angle. For example - river Godavari

3. Trellis drainage - They are formed when the main river is joined by tributaries approximately at a right

angle. For example river flowing on Chota Nagpur plateau region

4. Radial drainage - They form when the river streams flowing in all the direction starting from a central

door. For example - river Chambal

Q2. What are the main characteristic features of Himalayan River? How they are different from

peninsular rivers?

A2. The main characteristic features of Himalayan River system are :

They are perennial in nature, as they receive water from snow and rainfall.

These rivers have long course from source to the sea in the upper course.

These rivers are very destructive, they erode and carry large amount of sand and silt .

In the middle course these rivers form meanders and oxbow lakes.

The lower course of these rivers forms delta.

Difference between Himalyan rivers and Peninsular rivers :

1. The Himalayan rivers are perennial i.e. They flow throughout the year.

Whereas

The peninsular rivers are non-perennial or seasonal.

2. Himalayan rivers originate from the glaciers.

Whereas

The peninsular rivers originate from the plateaus.

3. The Himalayan rivers pass through the gorge and carve the deep valleys.

Whereas

The peninsular rivers pass from broad and shallow valleys.

Q3. Rivers are of great importance and play an important role in our economy. Justify the statement?

A3. The justification to the above statement is as follow :

Rivers are of fundamental importance in the history as a supply fresh water as well as fertile soil.

Rivers are the basic natural resource important for various human activities which help them in their

economic development.

In India rivers help in agriculture and agriculture is the base of Indian economy.

Using rivers for irrigation, navigation, hydropower generation is of special significance. hence, rivers

play an important role in our economy.

Q4. Compare the two phase of Ganga action plan?

A4. Ganga action plan phase 1

It was started in 1985 and was closed on 31st March 2000.

It was generalized in 25 towns in 3 states (uttar Pradesh, Bihar and West Bengal).

It was a dedicated program launched to restore the river water back to the bathing quality.

The steering committee of the national river conservation plan reviewed the progress of Ganga action

plan.

Ganga action plan phase 2

It was launched in stages between 1993 and 1996.

The plan was merged with nrcp covering 152 towns located along 27 interstate rivers in 16 states.

Under this plan the improvement of water quality by removing the pollutants from the river are being

taken up.

So far 69 schemes out of 215 schemes have been completed.

Q5. Define lakes and explain the types of lakes with example?

A5. Lakes are water bodies formed in the low line area of depression of earth which are surrounded by land.

Lakes differ from each other in their size and characteristics. like some are permanent, some are seasonal,

some are saline and many more.

There are four types of lakes :

1. Freshwater lake

2. Salt lake

3. Oxbow lake

4. Artificial or man made lake

1. Freshwater lake

These originate from the glaciers they are formed when glacier dug out a basin which is later filled

with the melted snow.

In India the freshwater lakes are found in the Himalayan region

The Wular lake in Kashmir is the largest freshwater lake in India

This lake is a result of tectonic activities

Other example of freshwater lake include the Dal lake, Bhimtal, Nainital, Loctal, etc.

2. Salt water lakes

In these types of lakes are mainly found in desert area or coastal area.

In saltwater lake the amount of salinity i.e. salt content is more.

Example of saltwater lake includes Chilika lake, Pulicat lake and Kolleru lake in the south or coastal

areas.

Sambhar lake in Rajasthan is used for producing salt and it is the largest saltwater lake in india.

3. Oxbow lake

A meandring river across of flood plain forms cut off that developed as oxbow lakes.

They are temporary lakes.

4. Man-made lakes

They are made by human beings keeping some special needs and purposes in mind.

Mostly these lakes are made on the backside of a dam. For example - Guru Gobind Sagar lake

(Bhakhra Nangal Project).

Bhopal lake is also man-made lake.

Q6. In what different ways do the rivers get polluted ?

A6. Rivers get polluted in the following ways :

The growing domestic, municipal, industrial and agricultural demand for water from rivers

naturally affect the quality of water.

The volume of river is also reduced because more and more water is being drained out of the rivers.

A heavy load of untreated sewage and industrial effluents are admitted into the rivers. This affect

not only the quality of water but also the self cleansing capacity of the river.

The increasing urbanisation and industrialisation also contribute to the river pollution.

Dumping of garbage into the streams is another cause of river pollution. They are changing the life-

giving rivers into toxic streams.