Climate Class 9 Geography NCERT Solution

Chapter 4 of Geography book of Class 9 is “Climate”. Here you will get the NCERT Solutions of Geography Chapter 4 Climate Class 9

Class 9 Geography Chapter 4 : Climate

Class 9 Social Science Geography Chapter 4 is “Climate” . Climate Class 9 geography is the most important chapter for exam point of view. The ncert exercise of this chapter consist of the questions which are related to the topics – Climate, Winds, Monsoon, etc

Geography Chapter 4 Climate Class 9 NCERT Solutions

Chapter Chapter 4 : Climate
SubjectGeography – Social Science
Class 9 ( Class – IX )
Study MaterialNCERT Solution ( Intext and End Exercise )
Number of Questions8 Questions
Text Book NameContemporary India I ( NCERT Text Book for Class 9 )

End Exercise NCERT Solutions

Geography Chapter 4 Climate Class 9 Question 1 : Choose the correct answer from the four alternatives given below.
(i) Which one of the following places receives the highest rainfall in the world?
(a) Silchar
(b) Mawsynram
(c) Cherrapunji
(d) Guwahati
Answer : Option [ b ] “Mawsynram is correct answer .

(ii) The wind blowing in the northern plains in summers is known as:
(a) Kaal Baisakhi
(b) Loo
(c) Trade Winds
(d) None of the above
Answer : Option [ b ] “Loo” is correct answer .

(iii) Which one of the following causes rainfall during winters in north-western part of India.
(a) Cyclonic depression
(b) Retreating monsoon
(c) Western disturbances
(d) Southwest monsoon
Answer : Option [ c ] “Western disturbances is correct answer .

(iv) Monsoon arrives in India approximately in:
(a) Early May
(b) Early July
(c) Early June
(d) Early August
Answer : Option [ c ] “Early June is correct answer .

(v) Which one of the following characterises the cold weather season in India?
(a) Warm days and warm nights
(b) Warm days and cold nights
(c) Cool days and cold nights
(d) Cold days and warm nights
Answer : Option [ b ] “Warm days and cold nights” is correct answer .

Geography Chapter 4 Climate Class 9 Question 2 : Answer the following questions briefly.
(i) What are the controls affecting the climate of India?
Answer :
a) Latitude : The Tropic of Cancer passes through the middle of the country from the Rann of Kuchchh in the west to Mizoram in the east. Almost half of the country, lying south of the Tropic of Cancer, belongs to the tropical area. All the remaining area, north of the Tropic, lies in the sub-tropics. Therefore, India’s climate has characteristics of tropical as well as subtropical climates

b) Altitude : India has mountains to the north, which have an average height of about 6,000 metres. India also has a vast coastal area where the maximum elevation is about 30 metres. The Himalayas prevent the cold winds from Central Asia from entering the subcontinent. It is because of these mountains that this subcontinent experiences comparatively milder winters as compared to central Asia.

c) Pressure and Winds : The climate and associated weather conditions in India are governed by the following atmospheric conditions:
• Pressure and surface winds;
• Upper air circulation; and
• Western cyclonic disturbances and tropical cyclones.

(ii) Why does India have a monsoon type of climate?
Answer :
a) The monsoon are experienced in a region between 20 degree North and 20 degree South and a major part of India lies in this region.
b) Climate of India is strongly affected by the monsoon winds

(iii) Which part of India does experience the highest diurnal range of temperature and why?
Answer :
The THAR desert ( Rajasthan) experiences highest diurnal range of temperature because it is far away from the sea and Secondly the sand heats up quickly and cools down quickly

(iv) Which winds account for rainfall along the Malabar coast?
Answer :
South West Monsoon Winds

(v) What are Jet streams and how do they affect the climate of India?
Answer :
Jet Streams are narrow belt of fast blowing winds of the upper atmosphere ( troposphere) of India. They affect Indian Climate as Under :
a) The sub tropical westerly jet streams which blows south of Himalayas (except summer) brings wester cyclone disturbances causing rain in winter in north west Indian and snowfall in mountains.
b) The sub tropical easterly jet streams blows over the Indian Peninsula in summer and affects the Indian Monsoon.

(vi) Define monsoons. What do you understand by “break” in monsoon?
Answer :
The word monsoons is derived from Arabic word’ mausim’ which literally means the season. Monsoon refers to the seasonal reversal in the wind direction during a year.
In advancing monsoon season, there ae break in the monsoon rains . It has wet and dry spells . The monsoon rain take place for a few days at a time then they stop for a few days and start again. It happens as a result of movement of the monsoon trough. It is known as the break in monsoon.

(vii) Why is the monsoon considered a unifying bond?
Answer :

Geography Chapter 4 Climate Class 9 Question 3 :
Why does the rainfall decrease from the east to the west in Northern India

Answer :
The rainfall decrease from east to west in Northern India because
a) bay of Bengal branch of the monsoon which causes rainfall in this part reaches here after dropping moisture in Eastern part of India.
b) The western part are away from sea so the monsoon winds get drier. Their capacity to hold the moisture also increases.

Geography Chapter 4 Climate Class 9 Question 4 : Give reasons as to why.
(i) Seasonal reversal of wind direction takes place over the Indian subcontinent?
Answer :

(ii) The bulk of rainfall in India is concentrated over a few months.
Answer :
The bulk of rainfall in India is concentrated over a few months because India gets maximum of its rainfall from south west monsoon winds (Arabian sea branch and Bay of Bengal Branch ) and these winds blow only over a few months for example : June to September

(iii) The Tamil Nadu coast receives winter rainfall.
Answer :
The Tamil Nadu coast receives winter rainfall because North-east trade winds which blows during winter over India reach here after passing over sea and cause rainfall here after passing over sear and cause rainfall here. This part of India does not get rain from south west monsoon as it lies in rain shadow area of western Ghats and Bay of Bengal branch also passes away without causing any rain over this part as the eastern Ghats are parallel to the winds direction of the Arabian sea branch.

(iv) The delta region of the eastern coast is frequently struck by cyclones.
Answer :

(v) Parts of Rajasthan, Gujarat and the leeward side of the Western Ghats are drought-prone.
Answer :
The Arabian sea branch of south west monsoon passes over Rajasthan and Gujarat without causing any rainfall as Aravalli range is parallel to the direction of these winds. Also this range is not enough high to stop these winds.

The leeward side of the western Ghats lies in the rain shadow area when monsoon winds reach here they are dry as they have already dropped moisture in the windward side. They also lost the moisture while descending the hills sloped . Hence this side of western Ghats and parts of Rajasthan and Gujarat are drought prone

Geography Chapter 4 Climate Class 9 Question 5 :
Describe the regional variations in the climatic conditions of India with the help of suitable examples.

Answer :

Geography Chapter 4 Climate Class 9 Question 6 :
Discuss the mechanism of monsoons.

Answer :

Geography Chapter 4 Climate Class 9 Question 7 :
Give an account of weather conditions and characteristics of the cold season

Answer :
a) The cold weather season begins with mid November in Northern India and stays till February.
b) December and January are coldest months in India.
c) The temperature decreases from the South to North.
d) Days are warm and Nights are cold. The frost is common in the North and the higher slopes of the Himalayas experiences snowfall.

e) During winter season, there is a high pressure area in Norther India . The North-East trade winds blows over India from land to sea. So most part are dry but Tamil Nadu coast get some rainfall as winds blows here from sea to land
f) Influence by the relief these winds blow through the Ganga valley from the west and North- West . The Weather is normally marked by clear sky, low temperature and low humidity and feeble, variable winds

g) The western cyclone disturbance is another feature of this season. They start from the Mediterranean sea and western Asia and move into India along the western flow. They cause small snowfall in Norther Plains and snowfalls in Mountains. This rainfall is important because it is good for Rabi crops. It is locally known as Mahawat.
h) The Peninsular region does not have a well defined cold season due to the moderating influence of the sea.

Geography Chapter 4 Climate Class 9 Question 8 :
Give the characteristics and effects of the monsoon rainfall in India

Answer :