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Class 6 Social Science - Geography - Major Domains of the Earth
Terms in this set (54)
What are the four major domains of the earth?
The four major domains of the earth are:
- atmosphere, and
Name the major continents of the earth?
The seven major continents of the Earth are Asia, Europe, Africa, North America, South America, Australia and Antarctica.
Name the two continents that lie entirely in the Southern Hemisphere.
The two continents that lie entirely in the Southern Hemisphere are Australia and Antarctica.
Name the different layers of atmosphere.
The different layers of the atmosphere are:
- thermosphere, and
Why is the earth called the 'blue planet'?
The earth is called the 'blue planet' because more than 71 percent of the earth is covered with water.
Why is the Northern Hemisphere called the Land Hemisphere?
The Northern Hemisphere called the Land Hemisphere because the greater part of Earth's landmass lies in the Northern Hemisphere.
Why is the Biosphere important for living organisms?
The biosphere is the narrow zone of contact between the land, water and air. It is in this zone that life that is unique to this planet exists. All living organisms including humans are linked to each other and to the biosphere for survival.
The mountain range that separates Europe from Asia is
(i) the Andes
(ii) the Himalayas
(iii) the Urals
The continent of North America is linked to South America by
(i) an Isthmus
(ii) a Strait
(iii) a Canal
The major constituent of atmosphere by percent is
(iii) Carbon dioxide
The domain of the earth consisting of solid rocks is
(i) the Atmosphere
(ii) the Hydrosphere
(iii) the Lithosphere
Which is the largest continent?
The deepest point on the earth is _____________ in the Pacific Ocean.
the Mariana Trench
The _____________ Ocean is named after a country.
The _____________ is a narrow contact zone of land, water and air that supports life.
The continents of Europe and Asia together are known as _____________.
The highest mountain peak on the earth is _____________.
What is the lithosphere?
The solid portion of the earth on which we live is called the lithosphere.
What is the atmosphere?
The gaseous layer that surrounds the earth is the atmosphere where oxygen, nitrogen, carbon dioxide and other gases are found.
What is the hydrosphere?
Water covers a very big area of the earth's surface and this area is called the hydrosphere. The hydrosphere comprises water in all its forms, i.e., ice, water and water vapour.
What is the biosphere?
The biosphere is the narrow zone where we find land, water and air together, which contains all forms of life.
What are the components of the lithosphere?
The lithosphere comprises the rocks of the earth's crust as well as the thin layers of soil that contain nutrient-rich elements which sustain living organisms.
Why do climbers experience problems in breathing at heights?
The density of the atmosphere varies with height. It is maximum at sea level and decreases rapidly as we go up. Climbers experience problems in breathing at heights due to the decrease in the density of air.
What is wind?
Air moves from high pressure to low pressure areas. Moving air is known as wind.
What is global warming?
The increase in the amount of carbon dioxide leads to increase in global temperatures. This is termed as global warming.
How is elevation of land measured?
Elevation of land is measured from the level of the sea, which is taken as zero.
What are the two major divisions of the earth's surface?
The two main divisions of the earth's surface are continents and ocean basins.
The large landmasses are known as the continents and the huge water bodies are called ocean basins.
How many continents are there on the earth? Name them.
There are seven major continents separated by large water bodies. These continents are Asia, Europe, Africa, North America, South America, Australia and Antarctica.
What are the components of the hydrosphere?
The hydrosphere consists of water in all its forms. Running water in oceans and rivers and in lakes, ice in glaciers, underground water and water vapour in the atmosphere all comprise the hydrosphere.
Name the chief movements of the ocean water
The three chief movements of ocean waters are:
- the waves,
- the tides, and
- the ocean currents.
Name the four major oceans of the world.
The four major oceans are the Pacific Ocean, the Atlantic Ocean, the Indian Ocean and the Arctic Ocean, in order of their size.
Give some characteristics of the continent Asia/
- 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 and the combined landmass of Europe and Asia is called the Eurasia (Europe + Asia).
Give some features of the European continent.
- 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.
Give some characteristics of the continent Africa.
- Africa is the second largest continent after Asia.
- The Equator or 00 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.
How is the continent of North America different from that of South America?
- North America is the third largest continent of 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: Pacific Ocean, Atlantic Ocean, and Arctic Ocean.
- South America lies mostly in the Southern Hemisphere.
- 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.
Give some characteristics of the continent Australia.
- 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.
Give some features of the Antarctica.
- Antarctica, completely in the Southern Hemisphere, is a huge continent. It is larger than the combined area of Europe and Australia.
- The South Pole lies almost at the centre of this continent.
- It is permanently covered with thick ice sheets.
- There are no permanent human settlements.
- Many countries have research stations in Antarctica. India also has two research stations there. These stations are named Maitri and Dakshin Gangotri.
Write a few lines on the Pacific Ocean.
- The Pacific Ocean is the largest ocean. It is spread over one-third of the earth.
- The Mariana Trench, the deepest part of the earth, lies under the Pacific Ocean.
- The Pacific Ocean is circular in shape. Asia, Australia, North and South Americas surround it.
How is the Atlantic Ocean different from the Artic Ocean?
- The Atlantic Ocean is the second largest Ocean in the world.
- It is 'S' shaped. It is flanked by the North and South Americas on the western side, and Europe and Africa on the eastern side.
- The coastline of the Atlantic Ocean is highly indented, thereby providing ideal locations for natural harbours and ports.
- From the point of view of commerce, it is the busiest Ocean.
- 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 the northern coasts of North America and Eurasia.
Give some features of the Indian 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.
Name the different layers of the atmosphere.
The atmosphere is divided into five layers based on composition, temperature
and other properties. These layers starting from earth's surface are called:
- The troposphere
- The stratosphere
- The mesosphere
- The thermosphere
- The exosphere.
What is the composition of the atmosphere? How are these gases useful to us?
The atmosphere is composed mainly of nitrogen and oxygen, which make up about 99 per cent of clean, dry air. By volume, nitrogen comprises 78%, oxygen comprises 21%, and other gases such as carbon dioxide, argon and others comprise 1%.
- Oxygen is essential for the life of organisms.
- Nitrogen helps in the growth of living organisms.
- Carbon dioxide, though present in minute amount, is important as it absorbs heat radiated by the earth and keeps the planet warm. It is also essential for the growth of plants.
The uppermost solid layer of the earth is called
The water mass of the earth including oceans , seas, rivers etc in the atmosphere
How many oceans are there
Which of the following is not a continent:
- The layer of oxygen gases which surrounds the earth
- Layer of various gases which surrounds the earth
- The layer of nitrogen gases which surrounds the earth
- The layer of carbon gases which surrounds the earth
layer of various gases which surrounds the earth
The major constituent of atmosphere by percent is
The domain of the earth consisting of solid rocks is
The ____ ocean is named after a country
Which one of the following is the largest continent?
- North America
- South America
Which of the following is not among the major domain of the earth
Which of the following is not an ocean
_____ passes through the Europe
- Tropic of Cancer
- Tropic of Capricorn
- Antarctic Circle
- Arctic Circle
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