Samacheer Kalvi 6th Social Science Term 1 Geography Solutions Chapter 2 Pdf
Tamilnadu Board Samacheer Kalvi 6th Social Science Term 1 Geography Solutions Chapter 2: Tamilnadu State Board Solution Class 6 Social Science Term 1 Geography Chapter 2 – Land and Oceans.
Samacheer Kalvi 6th Social Science Geography Solutions Chapter 2: Overview
Board |
Samacheer Kalvi |
Class |
6 |
Subject |
Social Science Geography |
Term |
1 |
Chapter Name |
Land and Oceans |
Multiple choice questions: (marks: 1)
1.) The International Mountain day celebrated on:
A.) December 11
B.) December 1
C.) December 10
Ans: December 11.
2.) Which is the largest continent in the world:
A.) Africa
B.) Asia
C.) Australia
Ans: Asia.
3.) Which continent is the smallest in the world:
A.) Asia
B.) Africa
C.) Australia
Ans: Australia.
4.) Which is the largest Ocean in the world:
A.) The Pacific Ocean
B.) The Indian Ocean
C.) The Atlantic Ocean
Ans: The Pacific Ocean.
5.) Which is the smallest Ocean in the world:
A.) The Indian Ocean
B.) The Atlantic Ocean
C.) The Arctic Ocean
Ans: The Arctic Ocean.
6.) Assertion (A): Tibetan plateau is called the ‘ roof of the world’. Reason(R): Tibetan plateau is the highest plateau in the world.
a.) Both A and R are true but R is not the correct explanation of A.
b.) Both A and R are true and R is the correct explanation of A.
c.) A is true and R is false.
d.) R is true but A is false.
7.) Which channel separates Maldives and minicoy islands:
A.) 8° channel
B.) 9° channel
C.) 10° channel
Ans: 8° channel.
8.) 6° channel separates:
A.) Indira point and Indonesia
B.) Maldives and minicoy islands
C.) Andaman and Nicobar Islands
Ans: Indira point and Indonesia
9.) Andaman and Nicobar separated by:
A.) 8° channel
B.) 9° channel
C.) 10° channel
Ans: 10° channel.
10.) 9° channel separates:
A.) Indira point and Indonesia
B.) Lakshadweep islands and minicoy islands
C.) Andaman and Nicobar Islands
Ans: Lakshadweep islands and minicoy islands.
11.) Assertion(A): The Earth looks blue when we see it from space. Reason(R): ⅔ of the Earth is covered by water bodies.
A.) Both A and R are true and R is not the correct explanation of A.
B.) Both A and R are true and R is not the correct explanation of A.
C.) A is true and R is false.
D.) R is true and A is false.
Ans: Both A and R are true and R is the correct explanation of A.
Answer the following questions: (marks: 1)
(1) What is called isthmus?
Ans: Isthmus is a narrow strip of land which connects two large landmasses or separates two large water bodies.
(2) What are called mountains?
Ans: A landform that rises 600 metre above its surroundings and has steep slopes is called a mountain.
(3) Which is the highest peak in the world?
Ans: Mount Everest (8,848 m) is the highest peak in the world.
(4) Which is the longest mountain range in the world?
Ans: The Andes mountain range (7000km) is the longest mountain range in the world.
(5) What is called a plateau?
Ans: Plateaus are the elevated portions of the Earth that have flat surfaces bounded by steep slopes.
(6) The flat topped part of the plateau is called ——.
Ans: tableland.
(7) Which is the mineral rich plateau in India?
Ans: Chotanagpur is the mineral rich plateau in India.
(8) What are called plains?
Ans: Plains are flat and relatively low-lying lands. Plains are usually less than 200 metres above sea level. Sometimes they may be rolling or undulating.
(9) What is erosion?
Ans: Erosion is the process of removal of surface material from the Earth’s crust.
(10) What is called deposition?
Ans: The process of removal of surface material from the Earth’s crust is called erosion. The process of eroded materials being transported and deposited on the low lying areas is called Deposition.
(11) Who named the Pacific Ocean?
Ans: The Spanish navigator Ferdinand Magellan named the ocean Pacific, meaning calm or tranquil.
(12) Which is the deepest point in the world?
Ans: Mariana trench (10,994 m) is the deepest point in the world.
(13) What is called the Pacific ring of fire?
Ans: A chain of volcanoes is located around the Pacific Ocean called the Pacific Ring of Fire.
(14) Which is the deepest point of the Atlantic Ocean?
Ans: The Milwaukee Deep in the Puerto Rica trench (8600 m) is the deepest point of the Atlantic Ocean.
(15) Which is the deepest point of the Indian Ocean?
Ans: The Java trench (7725 m) in the Indian Ocean is the deepest point of the Indian Ocean.
(16) ——— connects the Bay of Bengal and Palk Bay.
Ans: palk strait.
(17) Which is the deepest point of the southern Ocean?
Ans: The Southern sandwich trench (7135 m) is the deepest point of the Southern Ocean.
(18) The Eurasian basin is the deepest point of which Ocean?
Ans: The Eurasiam trench is the deepest point of the southern Ocean (5449 m).
(19) What is called peninsula?
Ans: The land surrounded by water on three sides is called peninsula.
(20) What is called strait?
Ans: A strait is a narrow stretch of water linking two large water bodies.
(21) What are called islands?
Ans: Island is a land surrounded by water on all sides.
(22) What is Bay?
Ans: Bay is a broad inlet of the sea where the land curves inwards.
Answer the following questions: (marks:2)
(1) What are called continents?
Ans: Continents and oceans are grouped as first order landforms. The vast land masses on Earth are called Continents and huge water bodies are called Oceans. There are seven continents. They are Asia, Africa, North America, South America, Antarctica, Europe and Australia.
(2) What are called oceans?
Ans: Oceans are vast expanses of water. There are five Oceans. They are: the Pacific Ocean, the Atlantic Ocean, the Indian Ocean, the Southern Ocean and the Arctic Ocean.
Answer the following questions : (marks:5)
(1) Discuss about the classification of landforms?
Ans: The Earth is covered by water which occupies 71% and land that occupies 29 % of the Earth’s surface. The surface of the Earth is not even, because it has lofty mountains, deep oceans and other landforms. These landforms can be classified as:
(A) First order landforms:
Continents and oceans are grouped as first order landforms. The vast land masses on Earth are called Continents and huge water bodies are called Oceans. There are seven continents. They are Asia, Africa, North America, South America, Antarctica, Europe and Australia. Asia is the largest continent, whereas Australia is the smallest one. Apart from continents, there are five oceans located on the Earth’s surface. They are the Pacific, Atlantic, Indian, Southern and Arctic Oceans. Among these oceans, the Pacific Ocean is the largest and the Arctic Ocean is the smallest.
(B) Second order landforms:
The second order landforms are categorised as mountains, plateaus and plains.
✓ Mountains : A landform that rises 600 metre above its surroundings and has steep slopes is called a mountain. Mountains are found in isolation or in groups. If the mountains extend for a larger area continuously, it is called a mountain range. These ranges stretch for hundreds or thousands of km. The Himalayas of Asia, the Rocky Mountains of North America and the Andes of South America are such examples. The Andes mountain in South America is the longest mountain range (7,000 km) in the world. The highest point of the mountain is known as its peak. Mt. Everest is the highest peak (8,848 m) in the world. Mountains are the sources of rivers. They also provide shelter to flora and fauna.
✓Plateaus:
Plateaus are the elevated portions of the Earth that have flat surfaces bounded by steep slopes. The elevation of plateaus may be a few hundred or several thousand metres. The Tibetan Plateau is the highest plateau in the world. So, it is called the ‘Roof of the world’. The flat topped part of the plateau is called Tableland. The plateaus are generally rich in minerals. The Chotanagpur Plateau is one of the mineral rich plateaus in India. Therefore, mining is one of the major activities of the people living here. The Deccan Plateau in peninsular India is of volcanic origin.
✓ Plains:
Plains are flat and relatively low-lying lands. Plains are usually less than 200 metre above sea level. Sometimes they may be rolling or undulating. Most plains are formed by rivers and their tributaries and distributaries.They are most suitable for human inhabitation. Hence, they are the highly populated regions of the world. The oldest civilisations like the Mesopotamian and the Indus civilisations developed in river plains.
(C) Third order landforms:
Third order landforms are formed on mountains, plateaus and plains mainly by erosional and depositional activities of rivers, glaciers, winds and waves. Valleys, beaches and sand dunes are some examples of third order landforms.
(2) Briefly discuss the oceans of the World?
Ans: The Earth looks blue when we see it from space. This is because two-thirds of it is covered by water. The water is found in oceans and seas. Oceans are vast expanses of water. Seas are water bodies partially or fully enclosed by land. There are five main oceans in the world.
- The Pacific Ocean:
The Pacific Ocean is the largest and deepest ocean on the Earth. It covers about one-third of the Earth’s total area and spreads for about 168.72 million sq.km. It is bounded by Asia and Australia in its west and North America and South America in its east. It stretches from the Arctic Ocean in the north to the Southern Ocean in the south. The deepest point, Mariana Trench, is 10,994 m and is located in the Pacific Ocean. A chain of volcanoes is located around the Pacific Ocean called the Pacific Ring of Fire.
- The Atlantic Ocean:
The Atlantic Ocean is the second largest ocean on Earth. It covers one sixth of the Earth’s total area and spreads for about 85.13 million sq.km. It is bounded by North America and South America in the west and Europe and Africa in the east. Like the Pacific, it stretches from the Arctic Ocean in the north to the Southern Ocean in the south. The shape of the Atlantic Ocean resembles the letter ‘S’. The Strait of Gibraltar connects the Atlantic Ocean with the Mediterranean Sea. The Atlantic Ocean is the busiest shipping route between the Eastern and Western hemispheres. The deepest point is the Milwaukee Deep in the Puerto Rica Trench (8600m).
- The Indian Ocean:
The Indian Ocean is the third largest ocean on the Earth’s surface. It covers an area of about 70.56 million sq.km. It is named after India. It is triangular in shape and bounded by Africa in the west, Asia in the north and Australia in the east. The Andaman and Nicobar Islands, Lakshadweep, Maldives, Sri Lanka, Mauritius and the Reunion Islands are some of the islands located in the Indian Ocean. Malacca strait connects the Indian Ocean and the Pacific Ocean. The Java trench (7,725 m) is the deepest point in the Indian Ocean.
- The Southern Ocean:
The Southern Ocean surrounds the continent of Antarctica and is enclosed by the 60°S latitude. It covers an area of 21.96 million sq.km. It is bordered by the southern parts of the Pacific, the Atlantic and the Indian Oceans. Farewell Island, Bowman Island and Hearst Island are some of the islands located in this ocean. The water in this ocean is very cold. Much of it is covered by sea ice. The deepest point in this ocean is South Sandwich Trench with a depth of 7,235 m.
- The Arctic Ocean:
The Arctic Ocean is the smallest ocean. It covers an area of 15.56 million sq.km. It lies within the Arctic Circle. It remains frozen for most of the year. Greenland, New Siberian Island and Novaya Zemlya Island are some of the islands located in the Arctic Ocean. The North Pole is situated in the middle of the Arctic Ocean. The Eurasian Basin is the deepest point in the Arctic Ocean, which is about 5,449 m deep.
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