NCERT Class 6 Social Science Chapter 17 Major Domains of the Earth

NCERT Class 6 Social Science Chapter 17 Major Domains of the Earth Solutions to each chapter is provided in the list so that you can easily browse through different chapters NCERT Class 6 Social Science Chapter 17 Major Domains of the Earth and select need one. NCERT Class 6 Social Science Chapter 17 Major Domains of the Earth Question Answers Download PDF. NCERT SST Class 6 Solutions.

NCERT Class 6 Social Science Chapter 17 Major Domains of the Earth

Join Telegram channel

Follow us:

Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. CBSE Class 6 Social Science Solutions are part of All Subject Solutions. Here we have given NCERT Class 6 Social Science Chapter 17 Major Domains of the Earth, NCERT Class 6 Social Science Textbook of Our Pasts – I: History, The Earth – Our Habitat: Geography, Social and political Life: Civics. for All Chapters, You can practice these here.

Major Domains of the Earth

Chapter: 17

THE EARTH – OUR HABITAT [GEOGRAPHY]

NCERT TEXTBOOK QUESTIONS WITH ANSWERS

Q. 1. Answer the following questions briefly: 

(a) What are the four major domains of the earth?

Ans. The four major domains of earth are: 

(i) Lithosphere.

(ii) Atmosphere.

(iii) Hydrosphere. 

(iv) Biosphere. 

(b) Name the major continents of the earth.

Ans. The major continents of the earth are:

(i) Asia.

(ii) Europe.

(iii) Africa. 

(iv) North America. 

(v) South America. 

(vi) Australia.

(vii) Antarctica.

(c) Name the two continents that lie entirely in the Southern Hemisphere.

Ans. The two continents that lie entirely in the Southern Hemisphere are: 

(i) Australia.

(ii) Antarctica.

(d) Name the different layers of atmosphere. 

Ans. The different layers of atmosphere are:

(i) Troposphere.

(ii) Mesosphere.

(iii) Stratosphere.

(iv) Thermosphere. 

(v) Exosphere.

(e) Why is the earth called the ‘blue planet’? 

Ans. Earth is called the blue planet because: 

(i) 71% of its part is covered with the water.

(ii) It looks like blue from the sky due to the presence of water.

(f) Why is the Northern Hemisphere called the Land Hemisphere?

Ans. The Northern Hemisphere is called the Land Hemisphere because the greater part of the landmass lies in the Northern Hemisphere.

(g) Why is the Biosphere important for living organisms?

Ans. The Biosphere is important for living organisms because: 

(i) It is in the zone where life exists.

(ii) There are several species of organisms which differ in size from microbes and bacteria to huge mammals. 

(iii) All the living organisms including humans are interlinked to each other and to the biosphere for survival.

Q. 2. Tick (✓) the correct option: 

(a) The mountain range that separates Europe from Asia is: 

(i) the Andes.

(ii) the Himalayas.

(iii) the Urals.

Ans. (iii) the Urals.

(b) The continent of North America is linked to South America by:

(i) an Isthmus.

(ii) a Strait.

(iii) a Canal.

Ans. (ii) a Strait.

(c) The major constituent of atmosphere by percent is:

(i) Nitrogen.

(ii) Oxygen.

(iii) Carbon dioxide.

Ans. (i) Nitrogen.

(d) The domain of the earth consisting of solid rocks is:

(i) the Atmosphere.

(ii) the Hydrosphere. 

(iii) the Lithosphere.

Ans. (ii) the Lithosphere.

(e) Which is the largest continent? 

(i) Africa.

(ii) Asia.

(iii) Australia.

Ans. (ii) Asia.

Q. 3. Fill in the blanks:

(a) The deepest point on the earth is _________in the Pacific Ocean.

Ans. Mariana Trench.

(b) The _________Ocean is named after a country.

Ans. Indian.

(c) The _________ is a narrow contact zone of land, water and air that supports life.

Ans. Biosphere.

(d) The continents of Europe and Asia together are known as _________.

Ans. Eurasia.

(e) The highest mountain peak on the earth is __________.

Ans. Mt. Everest.

MAP SKILLS

On the outline map of the world, mark the following: 

Europe, Asia, Antarctica, South America, Australia, Indian Ocean, Pacific Ocean, Atlantic Ocean, Ural Mountains and Isthmus of Panama. 

Ans. Students do yourself.

SOME OTHER IMPORTANT QUESTIONS FOR EXAMINATION

VERY SHORT ANSWER TYPE QUESTIONS

Q. 1. Which is the highest peak of the world? 

Ans. Mount Everest which is 8,848 meters above sea level is the highest peak.

Q. 2. Why does the earth appear blue from space? 

Ans. The earth appears blue from space because of 71% of water which is blue in colour. 

Q. 3. Name the four major domains of the earth.

Ans. The four major domains of the earth are: 

(a) Lithosphere.

(b) Atmosphere.

(c) Hydrosphere.

(d) Biosphere.

Q. 4. Which is the largest hot desert? 

Ans. The largest hot desert is the Sahara Desert.

Q. 5. Which line of mountains separates Asia from Europe? 

Ans. Ural mountains.

Q. 6. What is the combined landmass of Europe and Asia known as? 

Ans. Eurasia.

Q. 7. Which is the deepest point on lithosphere and where is it located?

Ans. Mariana Trench in the Pacific Ocean. 

Q. 8. Which continent is referred to as the island continent?

Ans. Australia.

Q. 9. Which two gasses are abundant in the atmosphere?

Ans. Nitrogen and oxygen.

Q. 10. Name the narrow strip of land that links North America with South America.

Ans. Isthmus of Panama. 

Q. 11. Which is the longest mountain range?

Ans. Andes.

Q. 12. Name the largest river of the world.

Ans. Nile.

Q. 13. Define wind.

Ans. Morning air is called wind.

Q. 14. Which is the smallest continent? What other name do we often call it?

Ans. The smallest continent is the Australia. The other name of Australia is island continent. 

Q. 15. In which continent the world’s biggest desert found? 

Ans. The continent in which the world’s biggest desert found is Africa.

SHORT ANSWER TYPE QUESTIONS

Q. 1. Give two reasons why lithosphere is important to us? 

Ans. The outermost layer of the earth’s crust is lithosphere. 

It plays an important role because of some reasons like:

(a) Without it there would have been no plant on the earth.

(b) It is the store house of various mineral resources including coal and oil.

Q. 2. Why is Atlantic Ocean the busiest ocean? Give two reasons. 

Ans. The Atlantic Ocean is the busiest ocean because of two reasons:

(a) The coastline of Atlantic Ocean is very long. 

(b) The irregular path is providing ideal location for natural ports and harbours.

Q. 3. What do you understand by Biosphere? Give two reasons for its unique quality.

Ans. The biosphere is the narrow zone of contact between the land, water and air. 

The two reasons for its unique quality are: 

(a) There are several species of organisms that vary in size from microbes and bacteria to huge mammals.

(a) All the living organisms including humans are linked to each other and to the biosphere for survival.

Q. 4. Give the composition of the gasses present in the atmosphere. 

Ans. The atmosphere is composed mainly of nitrogen and oxygen, which make up about 99% of clean dry air. Nitrogen 78%, Oxygen 21% and other gasses like carbon dioxide, argon and others comprise 1 percent of volume.

Q. 5. Name the main elements of biosphere. 

Ans. Plants, animals, human beings and microbes.

Q. 6. Why do climbers experience problem in breathing?

Ans. Climbers experience problem in breathing because of decrease in density of air. Density of air is maximum at the sea level and it decreases as we go up. 

Q. 7. What is atmosphere? Give importance of it.

Ans. The atmosphere is the envelope of air surrounding the earth.

(i) It provides us with the air we breathe. 

(ii) It protects us from the harmful effects of the sun’s rays.

Q. 8. Distinguish between continents and the glaciers.

Ans. Continents are big land masses of large extent covering a few million square kilometers. Whereas glacier is a mass of ice that moves slowly down a valley.

LONG ANSWER TYPE QUESTIONS

Q. 1. Give four significant features of Africa as the second largest continent.

Ans. Significant features of Africa as the second largest continent are as follows:

(a) The Equator or 0° latitude runs almost through the middle of the continent. 

(b) It is the only continent through which the Tropic of Cancer, the Equator and Tropic of Capricorn pass.

(c) The world’s longest river the Nile flows through Africa. 

(d) It is the continent bounded on all sides by oceans and seas.

Q. 2. How is an isthmus different from a strait? 

Ans. Isthmus is the narrow strip of land that has water on two sides and are joined by two larger areas of land. Whereas a strait is a narrow stretch of water that joins two large water bodies and is separated by two land masses.

Q. 3. Why does our planet looks blue from space?

Ans. Our planet Earth is called as blue planet because: 

(a) More than 71% of the earth is covered with water and 29% is with land. 

(b) Hydrosphere consists of water in all its forms. 

(c) Running water in oceans and rivers and in lakes, ice in glaciers, underground water and the water vapour in atmosphere, all comprise the hydrosphere. 

Q. 4. What do you understand by Global warming? What its precautions? 

Ans. Increase in the amount of CO, leads to increase in global temperatures, which is called a global warming.

Precautions of global warming are: 

(a) We must maintain a balance in nature.

(b) We must check pollution of water, land and air. 

Hence, earth will remain beautiful only if nature and man remains in a balanced manner.

Q. 5. Define the following terms:

(a) Isthmus. 

(b) Strait. 

(c) Continents.

Ans. (a) Isthmus: A narrow strip of land joining two landmasses. 

(b) Strait: A narrow passage of water connecting two large water bodies like sea and ocean. 

(c) Continents: Large landmasses are known as continents.

Q. 6. Name the component of atmosphere and describe how they are useful to us.

Ans. Atmosphere is composed mainly of Nitrogen, Oxygen and Carbon dioxide. 

These are useful in the following ways: 

(a) Nitrogen: It helps in the growth of living organism.

(b) Oxygen: It is the gas human beings breathe.

(c) Carbon dioxide: Plants use it to make food. It also helps to keep the earth warm. 

Q. 7. Earth despite being a ‘blue planet’ face a shortage of water. Why?

Ans. The earth despite being a blue planet’ face a shortage of water because:

(i) More than 97% of the earth’s water is found in the oceans and is too salty for human use.

(ii) Large amount of water is in the form of ice sheets and glaciers.

(iii) A very small amount of fresh water is left for the use of human.

Q. 8. Why does atmosphere act as a thin blanket of air?

Ans. The atmosphere act as a thin blanket of air because: 

(a) Our earth is surrounded by a layer of gasses called the atmosphere.

(b) This thin blanket of air is an integral and important aspect of the planet.

(c) It provides us with the air we breathe in. 

(d) It protects us from the harmful effects of sun’s rays.

HIGH ORDER THINKING SKILLS

Q. 1. Why do we consider Southern Hemisphere as watery hemisphere? 

Ans. We consider Southern Hemisphere as watery hemisphere because:

(a) Hydrosphere contains almost 71% of the earth’s surface.

(b) It includes oceans, seas, rivers, lakes, ice sheets, underground water and water vapour. 

(c) The seas and oceans have salt water, lakes and rivers contain fresh water. 

(d) 97% of the earth’s water reserves are found in the oceans.

As almost all of Southern Hemisphere is covered by oceans and seas. That is why this hemisphere is referred as watery hemisphere.

Q. 2. Why is earth called a unique planet? 

Ans. Earth is called as a unique planet because:

(a) It is neither too hot nor too cold.

(b) Its condition is very much favorable to support life.

(c) It contains life supporting gasses like oxygen, nitrogen etc. 

(d) 71% of earth’s surface is covered by water and only 29% forms the land surface. 

Q. 3. Why some areas experience low pressure and some areas high pressure?

Ans. The temperature decreases as we move up in the higher places. The atmosphere exerts pressure on the earth. This varies from place to place. Air moves from high pressure to low pressure. That is why some areas experience low pressure and some areas as high pressure.

VALUE BASED QUESTIONS

Q. 1. Why mountaineers have to carry oxygen cylinders with them to be able to breathe at high places? 

Ans. The density of atmosphere varies with height. It is maximum at the sea level and decreases rapidly as we go up. Climbers therefore experience problems in breathing due to this decrease in the density of air and they have to carry with them oxygen cylinders to be able to breathe at high altitudes. 

Q. 2. How can one prove that the atmosphere is made up of mixture of various gasses? 

Ans. One can prove that the atmosphere is made up of mixture of various gasses because: 

(a) It contains 78% of nitrogen, 21% of oxygen and 1% of argon, carbon dioxide, water vapor and other gasses.

(b) Nitrogen is essential to maintain fertility of soil and helps plants to grow, oxygen is the breath of life.

(c) The carbon dioxide helps plants to manufacture food and helps absorb heat to keep the earth warm. 

(d) Ozone, another gas found in small quantity is extremely important as it protects the earth from the harmful ultraviolet rays of the sun.

Q. 3. Which continent is known as island continent and why?

Ans. Australia is the smallest continent that lies entirely in the Southern Hemisphere. It is also surrounded on all sides by the oceans and seas. That is why this continent is known as island continent.

OBJECTIVE TYPE QUESTIONS

l. MULTIPLE CHOICE QUESTIONS:

Tick (✓) the correct option: 

(a) The zone where we find the land, water and air together is called:

(i) Lithosphere.

(ii) Biosphere.

(iii) Hydrosphere.

Ans. (i) Biosphere. 

(b) The largest ocean on the earth is:

(i) Atlantic Ocean.

(ii) Pacific Ocean.

(iii) Indian Ocean.

Ans. (ii) Pacific Ocean.

(c) The gas which has the largest quantity in the atmosphere is:

(i) Nitrogen.

(ii) Oxygen. 

(iii) Carbon Dioxide.

Ans. Nitrogen. 

(d) The _________separates Africa from Asia.

(i) Suez canal.

(ii) Panama canal.

(iii) Red sea.

Ans. (i) Suez canal.

(e) The India’s research stations in Antarctica are:

(i) Maitri.

(ii) Dakshin Gangotri.

(iii) Both (i) and (ii).

Ans. (iii) Both (i) and (ii).

II. FILL IN THE BLANKS: 

(a) The solid layer of the earth consisting of rocks and soil is called _________.

Ans. Lithosphere.

(b) The deepest point on the Lithosphere is _________.

Ans. Mariana Trench. 

(c) A narrow belt between the lithosphere, the hydrosphere and the atmosphere in which all forms of life exist is called ________.

Ans. Biosphere.

(d) The percentage of water on the earth is: 

Ans. 71%.

(e) The four realms of the earth are ________, _________, __________ and _______.

Ans. Lithosphere, hydrosphere, atmosphere and biosphere.

III. MATCH THE COLUMNS:

Ans.