MCQ on Oceans and Continents Class 6
Class 6 Social Science Chapter 2 MCQ Oceans and Continents
Multiple Choice Questions :
Question 1.
What is the most widespread colour seen on Earth from space?
(a) Green
(b) Blue
(c) Brown
(d) White
Answer:
(b) Blue
Question 2.
What percentage of Earth’s surface is covered with water?
(a) One-fourth
(b) One-third
(c) Half
(d) Three-fourths
Answer:
(d) Three-fourths
Question 3.
Which Vedic deity is associated with oceans, the sky, and water?
(a) Indra
(b) Agni
(c) Varuna
(d) Surya
Answer:
(c) Varuna
Question 4.
How many oceans are there on Earth according to the text?
(a) Four
(b) Five
(c) Six
(d) Seven
Answer:
(b) Five
Question 5.
Which ocean lies to the west of India?
(a) Bay of Bengal
(b) Arabian Sea
(c) Pacific Ocean
(d) Southern Ocean
Answer:
(b) Arabian Sea
Question 6.
Which is the smallest continent in the world?
(a) Australia
(b) Europe
(c) North America
(d) Africa
Answer:
Option (a) is correct
Explanation:
According to the area Australia is the smallest continent.
Question 7.
The deepest ocean of the world is the:
(a) Indian Ocean
(b) Pacific Ocean
(c) Arctic Ocean
(d) Atlantic Ocean
Answer:
Option (b) is correct
Explanation:
The depth of the ocean is more as compared to others.
Question 8.
Which ocean is named after a country?
(a) Indian Ocean
(b) Atlantic Ocean
(c) Arctic Ocean
(d) Pacific Ocean
Answer:
Option (a) is correct.
Explanation:
Indian ocean named after country India.
Question 9.
Continents are also surrounded by water, but because they are so large, they are not considered
(a) islands
(b) plains
(c) desert
(d) plateau
Answer:
Option (a) is correct.
Explanation:
Area of the continents is too large as compared to island.
Question 10.
Which continent is known as the ‘White Continent’?
(a) Antarctica
(b) Europe
(c) Australia
(d) Asia
Answer:
Option (a) is correct.
Explanation:
Antarctica is known as the ‘White Continent because ,t always remains under a thick cover of ice.
Assertion-Reason Type Questions :
I. There are two statements in each question marked as Assertion (A) and Reason (R). Choose your answer as per the options given below:
(a) Both (A) and (R) are true and (R) is the correct explanation of (A).
(b) Both (A) and (R) are true but (R) is not the correct explanation of (A).
(c) (A) is correct but (R) is wrong.
(d) (A) is wrong but (R) is correct.
1. Assertion (A): The Indian Ocean Tsunami Warning System helps to protect lives and property.
Reason (R): The Indian Ocean Tsunami Warning System can detect tsunamis before they hit the coast.
Answer:
(a) Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Assertion (A): Continents and oceans are evenly distributed between the Northern and Southern Hemispheres.
Reason (R): Oceans cover almost three-fourths of the Earth’s surface.
Answer:
(d) (A) is wrong but (R) is correct.
3. Assertion (A): The oceans produce more than half of the world’s oxygen.
Reason (R): The marine flora, including algae and seaweeds, contribute significantly to oxygen production.
Answer:
(a) Both (A) and (R) are true and (R) is the correct explanation of (A).
4. Assertion (A): Overfishing is a major cause of the decline of marine life.
Reason (R): Excessive fishing depletes fish populations faster than they can reproduce.
Answer:
(a) Both (A) and (R) are true and (R) is the correct explanation of (A).
5. Assertion (A): The 2004 tsunami caused widespread damage in the Indian Ocean region.
Reason (R): The tsunami was triggered by a volcanic eruption.
Answer:
(c) (A) is correct but (R) is wrong.
II. Questions 1 to 2 are assertion and reason-based questions.
The following options should be used for these questions.
(a) Doth Assertion (A) and Reason (R) are true, and Reason (R) is the correct explanation of Assertion (A).
(b) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
(c) Assertion (A) is true, but Reason (R) is false.
(d) Assertion (A) is false, but Reason (R) is true.
Question 1.
Assertion: Oceans support all kinds of marine life and play a critical role in the world climate.
Reason: Oceans are now seriously affected by human activity and need our collective protection.
Answer:
Option (a) is correct.
Explanation:
Oceans play vital role in sustaining live but on the other hand it is polluted by humans as well.
Question 2.
Assertion: North America and South America are generally considered to be two continents.
Reason: But if seen as a single landmass, they can also be considered as one.
Answer:
Option (a) is correct.
Explanation:
When seen as a single landmass, they can also be considered as one.
Question 3.
Assertion: A tsunami is a natural disaster that originates in the desert.
Reason: Tsunamis can travel thousands of kilometres and submerge coastal areas, causing widespread damage.
Answer:
Option (d) is correct.
Explanation:
A tsunami is another natural disaster that originates in the ocean. It is a huge and powerful wave generally caused by a strong earthquake or a volcanic eruption at the bottom of the ocean.
Question 4.
Assertion: The animal life of a particular region or period of time is called Fauna.
Reason: The plant life of a particular region or period of time is called Flora.
Answer:
Option (b) is correct.
Explanation:
The Flora and Fauna of a place define its plant and animal life. They vary from place to place.
Fill in the blanks :
1. The Earth is often called the _____ planet.
Answer:
blue
2. A large body offiand is called a ______.
Answer:
landmass
3. Freshwater makes up a very small proportion of the planet’s water resources and is found in glaciers, rivers, lakes, the atmosphere, and underground, which is called _____.
Answer:
groundwater
4. The largest island in the world is _______.
Answer:
Greenland
5. June 8 is designated by the United Nations as _____.
Answer:
World Oceans Day
6. The Duffed Nations has designated june 8 as _________.
Answer:
World Oceans Day
7. Continents may be counted in various ways; the most common count is _________.
Answer:
Seven
8. Oceans play a crucial role in regulating the _________ and sustaining life on Earth.
Answer:
Climate
9. The animal life of a particular region or period of time is called _________.
Answer:
Fauna
10. _________ colour represents the land.
Answer:
Brown
True or False :
1. Most of the Earth’s surface is covered with land.
Answer:
False
2. Oceans and continents are equally distributed between the Northern and Southern Hemispheres.
Answer:
False
3. Tsunamis are generally caused by strong earthquakes or volcanic eruptions at the bottom of the ocean.
Answer:
True
4. The Earth’s oceans are separate and do not interconnect.
Answer:
False
5. Oceans support all kinds of marine life and play a critical role in the world climate.
Answer:
True
6. The Northern Hemisphere has more land than the Southern Hemisphere.
Answer:
True
7. Greenland is the smallest island in the world.
Answer:
False
8. Africa and Eurasia are generally regarded as two continents, but sometimes as one.
Answer:
True
9. The plant life of a particular region or period of time is called Fauna.
Answer:
False
10. Overfishing is a significant threat to marine life.
Answer:
True
Match the following :
Question 1.
| Column A | Column B |
| 1. The Blue Planet | (a) The largest ocean |
| 2. Pacific Ocean | (b) Caused by underwater earthquakes or volcanic eruptions |
| 3. Sam noh Varunah | (c) Earth’s nickname due to its appearance from space |
| 4. Tsunami | (d) The coldest continent |
| 5. Antarctica | (e) Indian Navy’s motto invoking a deity associated with oceans |
Answer:
| Column A | Column B |
| 1. The Blue Planet | (c) Earth’s nickname due to its appearance from space |
| 2. Pacific Ocean | (a) The largest ocean |
| 3. Sam noh Varunah | (e) Indian Navy’s motto invoking a deity associated with oceans |
| 4. Tsunami | (b) Caused by underwater earthquakes or volcanic eruptions |
| 5. Antarctica | (d) The coldest continent |
Question 2.
| Column A | Column B |
| (1) First scientific base station | (i) Arctic |
| (2) The largest island in the world | (ii) Gulf |
| (3) On 26 December 2004 | (iii) Greenland |
| (4) Smallest ocean | (iv) ‘Dakshin Gangotri’ |
| (5) A part of the sea nearly surrounded with land | (v) Powerful Tsunami |
Answer:
| Column A | Column B |
| (1) First scientific base station | (iv) ‘Dakshin Gangotri’ |
| (2) The largest island in the world | (iii) Greenland |
| (3) On 26 December 2004 | (v) Powerful Tsunami |
| (4) Smallest ocean | (i) Arctic |
| (5) A part of the sea nearly surrounded with land | (ii) Gulf |
Passage Based Questions
I. Read the following source and answer the following questions:
The earth is called the blue planet. More than 71% of the earth is covered with water and 29% is with land. Hydrosphere consistS of water ¡n all its forms. As running water in oceans and rivers and in lakes, ice in glaciers1 underground water and the water vapour in atmosphereø all comprise the hydrosphere. More than 97% of the Earth1s water is found in the oceans and is too salty for human use. A large proportion of the rest of the water is in the form of ice sheets and glaciers or under the ground and a very small percentage is available as fresh water for human use. Hence, despite being a ‘blue planet’ we face a shortage of water!! Oceans— Oceans are the major part of hydr0SPh They are all interconnected. The ocean waters are always moving. The three chief movements of ocean waters are the waves, the tides and the ocean currents. The five major oceans are the pacific Ocean, the Atlantic Ocean, the Indian Ocean, the Southern Ocean and the Arctic Ocean, in order of their size.
The Pacific Ocean is the largest ocean. It is spread over one third of the earth. Mariana Trench, the deepest part of the earth, lies in the Pacific Ocean. The Pacific Ocean is almost circular in shape. Asia, Australia North and South America surround it. It is flanked by the North and South America on the western side, and Europe and Africa on the eastern side. The Atlantic Ocean is the second-largest ocean in the world. It is ‘S’ shaped and is highly indented. This irregular and indented coastline provides an ideal location for natural harbours and ports. From the point of view of commerce, it is the busiest Ocean. The Indian Ocean is the only ocean named after a country, that is, India. The shape of the ocean is almost triangular. In the north, it is bound by Asia, in the west by Africa and in the east by Australia. The Southern Ocean encircles the continent of Antarctica and extends northward to 60 degrees south latitude. The Arctic Ocean is located within the Arctic Circle and surrounds the North Pole. It is connected with the Pacific Ocean by a narrow stretch of shallow water known as the Bering Strait. It is bound by northern coasts of North America and Eurasia.
Question 1.
What percentage of earth’s covered with water?
(a) 29%
(b) 71%
(c) 30%
(d) 100%
Answer:
Option (b) is correct.
Explanation:
The earth is called the blue planet. More than 71% of the earth is covered with water and 29% is with land.
Question 2.
What are the chief movements of ocean?
(a) The waves
(b) The tides
(c) The ocean currents
(d) All of these
Answer:
Option (d) is correct.
Explanation:
The three chief movements of ocean waters are the waves, the tides and the ocean currents.
Question 3.
Which is the largest ocean?
(a) Atlantic ocean
(b) Pacific ocean
(c) Indian ocean
(d) Arctic ocean
Answer:
Option (b) is correct.
Explanation:
The Pacific Ocean is the largest ocean. It is spread over one-third of the Earth. Mariana Trench, the deepest part of the earth, lies in the Pacific Ocean.
Question 4.
Which is the ‘S’ shaped ocean?
(a) Indian ocean
(b) Pacific ocean
(c) Arctic ocean
(d) Atlantic ocean
Answer:
Option (d) is correct.
Explanation:
The Atlantic Ocean is the second- largest ocean in the world. It is ‘S’ shaped ocean and is highly indented.
Question 5.
The Arctic ocean is connected with the Pacific ocean by a narrow stretch of shallow water that is known as:
(a) Palk Strait
(b) Bering Strait
(c) Panama Strait
(d) None of these
Answer:
Option (b) is correct.
Explanation:
The Arctic Ocean is located within the Arctic Circle and surrounds the North Pole. It is connected with the Pacific Ocean by a njrrtnv stretch of shallow water known as Bering Strait.
II. Read the following source and answer the following questions:
The solid portion of the earth is called the lithosphere. It comprises the rocks of the earth’s crust and the thin layers of soil that contain nutrient elements which sustain organisms. There are two main divisions of the earth’s surface. The large landmasses are known as the continents and the huge water bodies are called the ocean basins. All the oceans of the world are connected with one another. The level of seawater remains the same everywhere. Elevation of land is measured from the level of the sea, which is taken as zero. The highest mountain peak Mt. Everest is 8,848m above the sea level. The greatest depth of 11,022 m is recorded at Mariana Trench in the Pacific Ocean. There are seven major continents. These are separated by large water bodies. These continents are – Asia, Europe, Africa, North America, South America, Australia and Antarctica. Asia is the largest continent. It covers about one-third of the total land area of the earth. The continent lies in the Eastern Hemisphere. The Tropic of Cancer passes through this continent. Asia is separated from Europe by the Ural mountains on the west. The combined landmass of Europe and Asia is called the Eurasia (Europe + Asia). Europe is much smaller than Asia. The continent lies to the west of Asia. The Arctic Circle passes through it.
It is bound by water bodies on three sides. Look at the map of the world and locate it. Africa is the second largest continent after Asia. The Equator or 0° latitude runs almost through the middle of the continent. A large part of Africa lies in the Northern Hemisphere. It is the only continent through which the Tropic of Cancer, the Equator and the Tropic of Capricorn pass. The Sahara Desert, the world’s largest hot desert, is located in Africa. The continent is bound on all sides by oceans and seas. The world’s longest river, the Nile, flows through Africa. North America is the third largest continent in the world. It is linked to South America by a very narrow strip of land called the Isthmus of Panama. The continent lies completely in the Northern and Western Hemisphere. Three oceans surround this continent. The Andes, world’s longest mountain range, runs through its length from north to south. South America has the world’s largest river, the Amazon. Australia is the smallest continent that lies entirely in the Southern Hemisphere. It is surrounded on all sides by the oceans and seas. It is called an island continent. Antarctica, completely in the Southern Hemisphere, is a huge continent. The South Pole lies almost at the centre of this continent. As it is located in the South Polar Region, it is permanently covered with thick ice sheets. There are no permanent human settlements. Many countries have research stations in Antarctica. India also has research stations there. These are named as Maitri and Dakshin Gangotri.
Question 1.
Which domain has solid portion on the earth?
(a) Lithosphere
(b) Atmosphere
(c) Hydrosphere
(d) All of these
Answer:
Option (d) is correct
Explanation:
The solid portion of the earth on which we live is called the lithosphere. It comprises the rocks of the earth’s crust and the thin layers of soil that contain nutrient elements which sustain organisms.
Question 2.
Where is Mariana Trench located?
(a) Atlantic ocean
(b) Pacific ocean
(c) Indian ocean
(d) None of these
Answer:
Option (b) is correct.
Explanation:
The greatest depth of 11,022 m is recorded at Mariana Trench in the Pacific Ocean.
Question 3.
The combined landmass of which continent is known as Eurasia?
(a) Europe 4- Asia
(b) Europe + Antarctica
(c) Asia + North America
(d) Africa + Europe
Answer:
Option (a) is correct
Explanation:
Asia is separated from Europe by the Ural Mountains on the west. The combined landmass of Europe and Asia is called the Eurasia (Europe + Asia). Europe is much smaller than Asia.
Question 4.
The Sahara Desert, the world’s largest hot desert, is located in:
(a) Africa
(b) Europe
(c) Australia
(d) Asia
Answer:
Option (a) is correct.
Explanation:
Africa is home to the world’s largest scorching desert, the Sahara Desert. The oceans and seas encircle the continent on all sides. Africa is home to the Nile, the longest river in the world.
Question 5.
World’s largest river, the Amazon is located in which continent?
(a) North America
(b) Africa
(c) South America
(d) None of these
Answer:
Option (c) is correct.
Explanation:
Three oceans surround this continent. The Andes, world’s longest mountain range, runs through its length from north to south. South America has the world’s largest river, the Amazon.
Self-Assessment :
Question 1.
What is the nickname given to Earth by early astronauts due to its appearance from space?
(a) The Green Planet
(b) The Blue Planet
(c) The Water Planet
(d) The White Planet
Question 2.
Which ocean is bordered by Asia, Africa, Australia, and the Southern Ocean?
(a) Atlantic Ocean
(b) Pacific Ocean
(c) Indian Ocean
(d) Arctic Ocean
Question 3.
Match the following:
| (i) Greenland | (a) Includes fish, dolphins, whales, and deep-sea creatures |
| (ii) The Indian Ocean | (b) Celebrated on June 8 to highlight the ocean’s importance |
| (iii) World Oceans Day | (c) The largest island in the world |
| (iv) Freshwater | (d) Bordered by Asia, Africa, Australia, and the Southern Ocean |
| (v) Marine fauna | (e) Found in glaciers, rivers, lakes, the atmosphere, and underground |
Options:
(a) (i) – (c), (ii) – (d),(ii) – (b), (iv) – (e), (v) – (a)
(b) (i) – (a), (ii) – (d), (iii) – (e), (iv) – (b), (v) – (c)
(c) (i) – (c), (ii) – (d), (iii) – (a), (iv) – (e),(v) – (b)
(d) (i) – (d), (ii) – (c), (iii) – (b), (iv) – (a), (v) – (e)
Question 4.
Which of the following is not one of the five major oceans?
(a) Pacific Ocean
(c) Atlantic Ócean
(c) Arctic Ocean
(d) Mediterranean Ocean
Question 5.
There are two, statements marked as Assertion (A) and Reason (R). Choose your answer as per the options given below:
Assertion (A): There are five listed oceans on the map but they are not really separate.
Reason (R): The lines that divide oceans on the map are no more than conventions-the natural world does not follow such boundaries.
(a) Both (A) and (R) are true and (R) is the correct explanation of (A).
(b) Both (A) and (R) are true but (R) is not the correct explanation of (A).
(c) (A) is correct but (R) is wrong.
(d) (A) is wrong but ( R) is correct.
Question 6.
How much of the Earth’s surface is covered with water?
Question 7.
What are the largest water bodies on Earth called?
Question 8.
What is the largest body of water on Earth?
Question 9.
Which sea lies to the west of India?
Question 10.
Why is Earth called the ‘blue planet’?
Question 11.
What are the main causes of tsunamis?
Question 12.
How do oceans contribute to the Earth’s water cycle?
Question 13.
What are some sources of ocean pollution?
Question 14.
Discuss the distribution of freshwater on Earth and its importance for life.
Question 15.
Elaborate on the historical significance of oceans for human migration, trade, and cultural development.
Question 16.
Why is it important to protect the oceans, and what are some measures to reduce ocean pollution?