6th Geography Term 1 Unit 2 Book Back Solutions

Samacheer Kalvi 6th Geography Term 1 Unit 2 Social Book Back Question and Answers:

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Geography – Term 1 Unit 2

Land and Oceans

 

A. Choose the correct answer:

1. Which of the following is the smallest ocean on Earth?
(a) The Pacific Ocean
(b) The Indian Ocean
(c) The Atlantic Ocean
(d) The Arctic Ocean
Answer:
(d) The Arctic Oceans

2. The Malacca Strait connects
(a) The Pacific and Atlantic Oceans
(b) The Pacific and Southern Oceans
(c) The Pacific and Indian Oceans
(d) The Pacific and Arctic Oceans
Answer:
(c) The Pacific and Indian Oceans

3. A Which of the following oceans is the busiest ocean?
(a) The Pacific Ocean
(b) The Atlantic Ocean
(c) The Indian Ocean
(d) The Arctic Ocean
Answer:
(b) The Atlantic Ocean

4. The frozen continent is ……………
(a) North America
(b) Australia
(c)Antarctica
(d) Asia
Answer:
(c) Antarctica

5. A narrow strip of water that connects two large water bodies
(a) A Strait
(b) An Isthmus
(c) An Island
(d) A Trench
Answer:
(a) A Strait

B. Fill in the blanks:

1. The world’s largest continent is ___________.
2. ___________ is the mineral rich plateau in India
3. The largest ocean is ___________.
4. Deltas are ___________ order landforms.
5. The Island continent is ___________.

Answer:

1. Asia
2. Chotanagpur Pkateau
3. The Pacific Ocean
4. third
5. Australia

C. Circle the odd one out

1. Africa, Europe, Australia, Sri Lanka.
2. The Arctic Ocean, the Mediterranean Sea, the Indian Ocean, the Atlantic Ocean
3. Plateau, Valley, Plain, Mountain
4. The Bay of Bengal, the Bering Sea, the China Sea, the Tasman Sea.
5. The Andes, the Rockies, the Everest, the Himalayas

Answer:

1. Sri Lanka
2. the Mediterranean Sea
3. Valley
4. The Bay of Bengal
5. the Everest

D. Match the following:

Answer:

1 – b; 2 – a; 3 – d; 4 – e; d – c

E.

i) Consider the following statements.

1. Plains are formed by rivers.
2. The ‘South Sandwich Trench’ is found in the Indian Ocean.
3. Plateaus have steep slopes.
Choose the correct answer using the codes given below.
(a) 1 and 3 (b) 2 and 3
(c) 1,2 and 3 (d) 2 only
Answer:
(a) 1 and 3

ii)Consider the following statements.

Statement I : Mountains are second order land forms.
Statement II : The Mariana Trench is the deepest trench in the world.
Which of the statement(s) is/are true?
(a) I is true; II is wrong (b) I is wrong; II is true
(c) Both the statements are true (d) Statements I and II are wrong.
Answer:
(c) Both the statements are true

F. Answer in a word

1. Which is the highest plateau in the world?
Answer:
Tibetan Plateau

2. Name a second-order landform.
Answer:
Mountains, plateaus and plains

3. Which ocean is named after a country?
Answer:
Indian Ocean

4. Name the islands located in the Arabian Sea.
Answer:
Lakshadweep islands and Minicoy islands

5. What is the deepest part of the ocean called as?
Answer:
Trench

G. Answer in brief.

1. What is a continent?
Answer:
The vast landmasses on Earth are called Continents.

2. Name the continents which surround the Atlantic Ocean.
Answer:

1. North America and South America in the west.
2. Europe and Africa in the east.

3. What are the oceans?
Answer:

1. An ocean is a vast expanse of water.
2. Pacific Ocean, Atlantic Ocean, Indian Ocean, Southern Ocean, and the Arctic Ocean are major oceans of the world.

4. List out the names of continents according to their size
Answer:

1. Asia
2. Africa
3. North America
4. South America
5. Antarctica
6. Europe and Australia.

5. Name the oceans which surround North America and South America.
Answer:
North America: On the west by the Pacific Ocean, on the east by Atlantic ocean and on the north by Arctic ocean
South America: On the west by the Pacific Ocean, on the east by Atlantic ocean.

H. Distinguish between.

1. A Mountain and a Plateau
Answer:
Mountain:

• A landform that rises 600 meters above its surroundings and has steep slopes is called a mountain.
• Mountains are found in isolation or in groups.
• The highest point of a mountain is known as a peak.
• The Andes mountain in South America is the longest mountain range in the world.

Plateau:

• Plateaus are the elevated portions of the Earth that have flat surfaces bounded by steep slopes.
• The elevation of plateaus maybe a few hundred meters or several thousand metre.
• The flat-topped part of the plateau is called Tableland.
• Tibetan Plateau is the highest plateau in the world.

2. An ocean and a sea?
Answer:

1. Plateaus are the elevated portions of the Earth that have flat surfaces bounded by steep slopes.
2. The elevation of plateaus maybe a few hundred meters or several thousand metre,
3. Tibetan plateau is the highest plateau in the world. So it is called the “Roof of the world”
4. The Chotanagpur plateau is one of the mineral-rich plateaus in India.
5. The Deccan plateau in peninsular India is of volcanic origin.

I. Answer the following questions in detail.

1. Mention the classification of landforms.
Answer:
First-order Landforms:

(i) Continents and oceans are grouped as first order and forms. the vast landmasses on Earth are called Continents and huge water bodies are called Oceans.

(ii) Asia is the largest continent, whereas Australia is the smallest one.

Second-order and forms:
The second-order and forms are categorised as mountains, plateaus, and plains.

Third-order and forms:
Third-order and forms 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 and forms.

2. Write a note on plateaus
Answer:

1. Plateaus are the elevated portions of the Earth that have flat surfaces bounded by steep slopes.
2. The elevation of plateaus maybe a few hundred metres or several thousand metre.
3. Tibetan Plateau is the highest plateau in the world.
4. Generally, plateaus are rich in minerals.
5. Chotanagpur Plateau is one of the mineral-rich plateaus in India.
6. Deccan Plateau in peninsular India is of volcanic origin.

3. Plains are highly populated. Give reasons
Answer:

1. Plains are flat and relatively low-lying lands. Plains are usually less than 200 meters above sea level.
2. Most plains are formed by rivers, their tributaries, and distributaries.
3. These plains are used extensively for agriculture due to the availability of water and fertile soil
4. They are most suitable for human habitation.
5. Hence, they are the highly populated regions of the world.

4. Give the important features of the Pacific Ocean.
Answer:

1. The Pacific Ocean is the largest and deepest ocean on Earth.
2. It is bounded by Asia and Australia in its west and North America and South America in its east.
3. It stretches from the Arctic Ocean in the North to the Southern Ocean around in the south.
4. The deepest point Mariana Trench is 10,994 m and is located in the Pacific Ocean.
5. A chain of volcanoes is also present around the Pacific Ocean. They are called the Pacific Ring of Fire.

5. Write down the importance of oceans.
Answer:

1. Oceans are the lifeblood of planet Earth and humankind.
2. They flow over nearly three-quarters of our planet.
3. They hold 97% of the planet’s water.
4. They produce more than half of the oxygen in the atmosphere.
5. Absorb the most carbon from it.
6. The oceans along with the atmosphere, keep temperatures fairly constant worldwide.