6th Std Social Science Term 1 Solution | Lesson.6 Land And Oceans

Lesson.6 Land And Oceans

Lesson.6 Land And Oceans

A. Choose the correct answer

1. Which of the following is the smallest ocean on Earth?

  1. The Pacific Ocean
  2. The Indian Ocean
  3. The Atlantic Ocean
  4. The Arctic Ocean

Ans : The Arctic Ocean

2. The Malacca Strait connects

  1. The Pacific and Atlantic Oceans
  2. The Pacific and Southern Oceans
  3. The Pacific and Indian Oceans
  4. The Pacific and Arctic Oceans

Ans : The Pacific and Southern Oceans

3. Which of the following oceans is the busiest ocean?

  1. The Pacific Ocean
  2. The Atlantic Ocean
  3. The Indian Ocean
  4. The Arctic Ocean

Ans : The Atlantic Ocean

4. The frozen continent is

  1. North America
  2. Australia
  3. Antarctica
  4. Asia

Ans : Antarctica

5. A narrow strip of water that connects two large water bodies

  1. A Strait
  2. An Isthmus
  3. An Island
  4. A Trench

Ans : A Strait

B. Fill in the blanks.

1. The world’s largest continent is _________________

Ans : Asia

2. _________________ is the mineral rich plateau in India

Ans : Chtanagpur PKateau

3. The largest ocean is _________________

Ans : the pacific ocean

4. Deltas are _________________ order landforms.

Ans : third

5. The Island continent is _________________

Ans : Australia

C. Circle the odd one out

1.  Africa, Europe, Australia, Sri Lanka

Ans : Sri Lanka

2. The Arctic Ocean, the Mediterranean Sea, the Indian Ocean, the Atlantic Ocean 

Ans : The Mediterranean Sea

3. Plateau, Valley, Plain, Mountain

Ans : Valley

4. The Bay of Bengal, the Bering Sea, the China Sea, the Tasman Sea.

Ans : The Bay of Bengal

5. The Andes, the Rockies, the Everest, the Himalayas

Ans : the Everest

D. Match the following:

1. The South Sandwich TrenchThe Atlantic Ocean
2. The Milwaukee TrenchThe Southern Ocean
3. The Mariana TrenchThe Indian Ocean
4. The Eurasian BasinThe Pacific Ocean
5. The Java TrenchThe Arctic Ocean
Ans : 1 – B, 2 – A, 3 – D, 4 – E, 5 – 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.

  1. 1 and 2
  2. 2 and 3
  3. 1, 2 and 3
  4. 2 only

Ans : 1 and 3

ii) Consider the following statements.

Statement I : Mountains are second order landforms

Statement II : The Mariana Trench is the deepest trench in the world. 

Which of the statement(s) is/are true?

  1. I is true; II is wrong
  2. I is wrong; II is true
  3. Both the statements are true
  4. Statements I and II are wrong.

Ans : Both the statements are true

F. Answer in a word: 

1. Which is the highest plateau in the world?

Tibetian plateau

2. Name a second order landform.

Mountains or Plateaus, Plains

3. Which ocean is named after a country?

Indian ocean

4. Name the island located in the Arabian Sea.

Laksha dweep islands

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


G. Answer in brief:

1. What is a continent?

The vast land masses on earth are called continents.

2. Name the continents which surround the Atlantic Ocean.

The Atlantic Ocean is bounded by North America and South America in the west and (Europe and Africa in the East)

3. What are oceans?

Oceans are vast expanse of water.

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

From the largest to the smallest, they are Asia, Africa, North America, South America, Antarctica, Europe and Australia.

5. Name the oceans which surround North America and South America.

North America:

On the west by Pacific Ocean, on the east by Atlantic Ocean and on the north by Arctic Ocean

South America :

On the west by Pacific Ocean, on the east by Atlantic Ocean

H. Distinguish between:

1. A Mountain and a Plateau

A landform that rises over 600 metre above its surroundings and has steep slopes is called a mountainPlateaus are the elevated portions of the earth that have flat surfaces bounded by steep slopes. The elevation of plateaus may be a few hundred metres or several thousand metres.
Ex: HimalayasEx : Chotanagpur Plateau

2. An ocean and a sea

An OceanA Sea
Oceans are vast expanse of waterSeas are water bodies partially or fully enclosed by land.
Ex: Pacific OceanEx: Bay of Bengal, Arabian Sea.

I. Answer the following questions in detail:

1. Write down the classification of land forms.

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.
  • Asia is the largest continent, whereas Australia is the smallest one.

Second order landforms:

  • The second order landforms are categorised as mountains, plateaus and plains. 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

2. Write a note on 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 metre or several thousand metre.
  • Tibetian Plateau is the highest plateau in the world. So, it is called as the ‘Roof of the world’.
  • The Chotanagpur Plateau is one of the mineral rich plateaus in India.
  • The Deccan Plateau in peninsular India is of volcanic origin.

3. Plains are highly populated. Give reasons

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

4. Give the important features of the Pacific Ocean.

  • The Pacific Ocean is the largest and deepest ocean on the Earth.
  • 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.

5. Write down the importance of oceans.

  • Oceans are the life blood of planets Earth/Human kind.
  • They flow oven nearly three quarters of our planet
  • They hold 97% of the planets water.
  • Absorb the most carbon from it.
  • They produce more than half of the oxygen in the atmosphere.
  • The oceans along with the atmosphere, keep temperature fairly constant worldwide

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