10th Social Science - Book Back Answers - Geography Unit 6

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Tamil Nadu Board 10th Standard Social Science - Geography Unit 6: Book Back Answers and Solutions

This post covers the book back answers and solutions for Unit 6 – Geography from the Tamil Nadu State Board 10th Standard Social Science textbook. These detailed answers have been carefully prepared by our expert teachers at KalviTips.com.

We have explained each answer in a simple, easy-to-understand format, highlighting important points step by step under the relevant subtopics. Students are advised to read and memorize these subtopics thoroughly. Once you understand the main concepts, you’ll be able to connect other related points with real-life examples and confidently present them in your tests and exams.

By going through this material, you’ll gain a strong understanding of Geography Unit 6 along with the corresponding book back questions and answers (PDF format).

Question Types Covered:

1 Mark Questions: Choose the correct answer, Fill in the blanks, Identify the correct statement, Match the following
2 Mark Questions: Answer briefly
3, 4, and 5 Mark Questions: Answer in detail

All answers are presented in a clear and student-friendly manner, focusing on key points to help you score full marks.

All the best, Class 10 students! Prepare well and aim for top scores. Thank you!

Unit 6: Physical Geography of Tamil Nadu

I. Choose the correct answer.

1. The latitudinal extent of Tamil Nadu is
a) 8°4’N to 13°35’N
b) 8°5’S to 13°35’S
c) 8°0’N to 13°5’N
d) 8°0’S to 13°05’S
Answer Key:
a) 8°4’N to 13°35’N

2. The longitudinal extent of Tamil Nadu is _____.
a) 76°18’ E to 80°20’E
b) 76°18’ W to 80°20’W
c) 86°18’ E to 10°20’E
d) 86°18’ W to 10°20’W
Answer Key:
a) 76°18’ E to 80°20’E

3. The highest peak in Tamil Nadu is _____.
a) Anaimudi
b) Doddabetta
c) Mahendragiri
d) Servarayan
Answer Key:
b) Doddabetta

4. Which of the following passes is not located in the Western Ghats of Tamil Nadu?
a) Palghat
b) Shencottah
c) Bhorghat
d) Achankoil
Answer Key:
c) Bhorghat

5. Which one of the following rivers flow into the Arabian Sea?
a) Periyar
b) Cauvery
c) Chittar
d) Bhavani
Answer Key:
a) Periyar

6. The district with the largest mangrove forest cover in Tamil Nadu is _____.
a) Ramanathapuram
b) Nagapattinam
c) Cuddalore
d) Theni
Answer Key:
c) Cuddalore

7. Retreating monsoon wind picks up moisture from _____.
a) Arabian sea
b) Bay of Bengal
c) Indian Ocean
d) Timor sea
Answer Key:
b) Bay of Bengal

8. The district which has the largest forest cover in Tamil Nadu is _____.
a) Dharmapuri
b) Vellore
c) Dindigul
d) Erode
Answer Key:
d) Erode

II. Fill in the blanks.

1. The plateau which lies between the Nilgiris and Dharmapuri districts is _____.
2. _____ is the highest peak in the Southern most part of the Eastern Ghats.
3. The riverine Island of Srirangam is located between _____ and _____ branches of cauvery.
4. _____ is the Tamil Nadu state animal.
Answer Key:
1. Coimbatore
2. Solaikaradu
3. Northern (Coleroon or Kollidam), and Southern (Cauvery)
4. Nilgiri Tahr

III. Match the following.

1	Winter season	Pre-monsoon
2	Summer season	June to September
3	South west monsoon	March to May
4	North east monsoon	January and February
5	Mango Showers	October to December

Answer Key:

1	Winter season	January and February
2	Summer season	March to May
3	South west monsoon	June to September
4	North east monsoon	October to December
5	Mango Showers	Pre-monsoon

IV. Assertion type question.

1. Assertion (A) : Tamil Nadu does not receive much rainfall from the south west monsoon.
Reason (R) : It is situated in the rain shadow area of the Western Ghats.
a) Both (A) and (R) are true and (R) explains (A).
b) Both (A) and (R) are true but, (R) does not explain (A).
c) (A) is true but, (R) is false.
d) (R) is true but, (A) is false.
Answer Key:
a) Both (A) and (R) are true and (R) explains (A).

V. Answer the following brief.

1. State the boundaries of Tamil Nadu.
Answer Key:
1. Bay of Bengal in the East, Kerala in the West, Karnataka in the North West, Andhra Pradesh in the North and Indian Ocean in the South are the boundaries of Tamil Nadu.

2. What is ‘Teri’?
Answer Key:
1. ‘Teri’ are the sand dunes formed along the coast of Ramanathapuram and Thoothukudi districts.

3. How is coastal plain formed?
Answer Key:
1. Coastal plain is formed by rivers that flow from West towards East to the Bay of Bengal.
2. It is called Coromandel or Cholamandalam plain and extends from Chennai to Kanyakumari.

4. Name the major islands of Tamil Nadu.
Answer key:
1. Pamban
2. Hare
3. Krusadai
4. Nallathanni Theevu
5. Pullivasal
6. Srirangam
7. Upputanni
8. Island Grounds
9. Kattupalli Islands
10. Quibble Island
11. Vivekananda Rock Memorial

5. Name the tributaries of river Thamirabarani.
Answer Key:
1. Kariyar
2. Servalar
3. Manimuthar
4. Gadananathi
5. Pachaiyar
6. Chithar
7. Ramanathi

6. Define : Disaster Risk Reduction.
Answer Key:
Disaster Risk Reduction is the concept and practice of reducing the disaster risks through systematic efforts to analyse to reduce the casual factors of disaster.

7. During cyclone, how does the Meterological department warn the fishermen?
Answer Key:
1. The Meterological Department warns the fishermen through social media, mobile phones, TV and the Newspapers.
2. The Fishermen are warned not to venture into the sea and keep their boats and rafts securely tied.

VI. Distinguish between the following.

1. Thamirabarani and Cauvery.
Answer Key:

Thamirabarani	Cauvery
Originates from a peak in Pothigai hills in Western Ghats above Papanasam in the Ambasamudram taluk.	Originates from Talacauvery in the Brahmagiri hills of Kodagu district of Karnataka in Western Ghats.
Originates in Tamil Nadu.	Originates in Karnataka.
Flows through Tirunelveli, Tuticorin and merges in to the Bay of Bengal.	Flows through Dharmapuri, Salem, Tiruchirappalli districts and merges into the Bay of Bengal.
Servalar, Manimuthar, Pachaiyar, Chithar are the tributaries.	Bhavani, Noyyal, Amaravathi are the tributaries.

VII. Give reasons for the following.

1. Eastern Ghats are not a continuous range.
Answer key:
1. Eastern Ghats are dissected at many places by rivers that flow into the Bay of Bengal.
2. So they are not a continuous range like Western Ghats.
(Discontinuous and irregular)

2. Tamil Nadu receives low rainfall during the southwest monsoon.
Answer key:
1. TamilNadu is located in the rain shadow region of the South West Monsoon which blows from Arabian Sea.
2. So it gets less rainfall.

VIII. Answer the following in paragraph.

1. Describe the nature of the plateau region of Tamil Nadu.
Answer key:

Plateau region of Tamil Nadu:
1. It is located between the Western and Eastern Ghats.
2. It’s triangular in shape and covers an area of about 60,000 sq. kms.

Bharamahal plateau:
1. It is situated in the North Western part of Tamil Nadu having a part of Mysore plateau.
2. It’s height ranges from 350 to 710 mts.
3. It includes Dharmapuri and Krishnagiri districts.

Coimbatore plateau:
1. It lies between the Nilgiris and Dharmapuri district.
2. Its height is from 150 to 450 mts.
3. Salem, Coimbatore and Erode districts are included in it.
4. It is separated from the Mysore plateau by the Moyar river.
5. Rivers originating in the Western Ghats namely Bhavani, Noyyal and Amaravathi form valleys in this region.

Sigur plateau:
1. It founds in the region of Nilgiris

Madurai plateau:
1. It extends up to the foot hills of the Western Ghats in Madurai district.
2. It includes Vaigai and Tamirabarani basins in this zone.

2. Write an account on river Cauvery.
Answer Key:
1. River Cauvery originates from Talacauvery in the Brahmagiri hills of Kodagu (Coorg) district of Karnataka in the Western Ghats.
2. It is 805 km long and about 416 km of its course is in TamilNadu.
3. It covers the boundaries of Karnataka and Tamil Nadu for a distance of 64 km.
4. It forms Hogenakkal waterfalls in Dharmapuri District.
5. Mettur Dam is located across the river in Salem district.
6. Its tributary Bhavani joins it from Mettur, then it enters the eastern plains of TamilNadu. Noyyal and Amaravathi join Cauvery at Thirumukkoodal.
7. The River is wider in this region and is called ‘Agandra Cauvery’
8. It branches into two parts known as Kollidam and Cauvery in Tiruchirappalli district.
9. After flowing for about 16 km two branches join together to form the “Srirangam Islands”.
10. The Grand Anicut also known as Kallanai was built across the river Cauvery. After Kallanai, it breaks into a large number of distributaries forming a large delta.
11. This net work of delta is known as ‘Garden of Southern India’. It merges into Bay of Bengal to the South of Cuddalore.

3. Bring out the types and distribution of soils in Tamil Nadu.
Answer Key:
The soils of Tamil Nadu are broadly classified into “Five Types”.

Alluvial soil:
1. Alluvial Soils are formed by the deposition of silt by the rivers.
2. River valleys and coastal plains.
3. Thanjavur, Tiruvarur, Nagapattinam, Villupuram, Cuddalore.

Black soil:
1. Black soils are formed by weathering of igneous rocks.
2. It is also called as “Regur Soil”.
3. Coimbatore, Madurai, Virudhu Nagar, Tirunelveli and Thoothukudi.

Red soil:
1. Red soils covers two - thirds of total area.
2. (Found particularly in the central districts of the state.)
3. Sivagangai and Ramanathapuram.

Laterite soil:
1. Laterite soils is formed by the process of intense leaching.
2. Kancheepuram, Tiruvallur and Thanjavur and some patches over the mountainous region in the Nilgiris.

Saline soil:
1. Saline soils in Tamil Nadu confined to the Coromandel coast.
2. Vedaranyam has a pocket of Saline soil.

4. What are the Risk reduction measures taken before and after cyclone.
Answer Key:

Risk reduction measures taken before cyclone:
1. Ignore rumours - stay calm, Don’t be panic.
2. Keep mobile phones charged for connectivity.
3. Keep abreast with the news on the mass medias like radio and Television.
4. Keep documents, cash, valuable safe. (Water proof containers)
5. Prepare an emergency kit for survival.
6. Untie cattle for their safety.
7. Try to help our neighbours along with us.

Risk reduction measures taken after cyclone:
1. If shifted to relief camps, stay there till instructions are received.
2. Strictly avoid loose electrical wires and connections.
3. Beware of snakes and other creatures.
4. Clear the debris from the surroundings.
5. Use boiled water for drinking.
6. Sprinkle Bleaching powder on the entire surroundings.
7. Report losses truthfully and accurately to the authorities.

IX. Map Study.

1. Mark important rivers, distribution of soil and forest types on different Tamil Nadu maps.
Answer Key:

(a) Important rivers:
1. Cauvery
2. Palar
3. Then Pennaiyar / Ponnaiyar
4. Vaigai
5. Thamirabarani.

Other rivers:
1. Coleroon or Kollidam
2. Amaravathi
3. Bhavani
4. Noyyal
5. Cheyyar.

(b) Distribution of soil

(c) Forest type (Natural vegetation)
1. Tropical evergreen forest: Slopes of Western Ghats Nilgiris, Coimbatore, Tirunelveli, Kanyakumari.
2. Temperature forest: Anaimalai, Palani hills.
3. Tropical deciduous forest: Eastern Ghats, Servarayan, Kollimalai, Pachaimalai.
4. Mangrove forest: Cuddalore, Chidambaram.