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CHAPTER —5, MAJOR DOMAINS OF THE EARTH, , Q. 1A Answer the following questions briefly., , What are the four major domains of the earth?, , Answer:, , The four major domains of the Earth are, , e Lithosphere-the solid portion of the Earth where we live., e Atmosphere-the layer of gases that surround the Earth., , e Hydrosphere-the water present on the surface of the Earth, , e Biosphere-a small area that contains all forms of life, supported by land,, water and air together., , Q. 1 B Answer the following questions briefly., Name the major continents of the earth., Answer:, , Continents are large masses of land on the surface of the Earth. They are, separated by large water bodies. There are 7 major continents. They are, , e Asia, , e Europe, , e@ Africa, , e North America, e South America
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e Australia, , e Antarctica, , Q. 1 C Answer the following questions briefly., Name the two continents that lie entirely in the Southern Hemisphere., Answer:, , When you look at the map of the world, you will observe that most of the, continents lie in the Northern Hemisphere. There are only 2 continents, that lie entirely in the Southern Hemisphere. They are, , e Australia, , e Antarctica, , Q. 1 D Answer the following questions briefly., Name the different layers of atmosphere., Answer:, , The thin blanket of gases that surround the Earth is called Atmosphere., The air we breathe is provided by the atmosphere. It also protects us from, , the damaging effects ofthe sun’s rays. The different layers of atmosphere, are:, , e Troposphere, © Stratosphere, @ Mesosphere, e Thermosphere, , e Exosphere
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Q. 1 E Answer the following questions briefly., Why is the Earth called the ‘blue planet’?, , Answer:, , Tf you see a globe, you will notice that the color most used in the globe is, blue. When seen from space, the Earth appears blue. This is because 71, per cent of our Earth is covered with water. Hence, Earth is called a blue, planet., , Q. 1 F Answer the following questions briefly., Why is the Northern Hemisphere called the Land Hemisphere?, Answer:, , Most of the continents lie in the Northern Hemisphere. Only 2 continents, lie entirely in the Southern Hemisphere. Therefore, Northern Hemisphere, is called the Land Hemisphere as a majority of the land lies in it., , Q. 1G Answer the following questions briefly., Why is the Biosphere important for living organisms?, Answer:, , Biosphere consists of the three domains on the Earth, namely, Land,, Water and Air. They interact with each other and in turn, have an effect, on each other. All the organisms in the Biosphere are dependent on it for, survival. Thus, Biosphere is important for all living organisms., , Q. 2 A Tick the correct answer., , The mountain range that separates Europe from Asia is
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A. the Andes, , B. the Himalayas, C. the Urals, Answer:, , The Ural mountain range is situated on the western side of Asia. It, separates the continent of Europe from the continent of Asia., , Q. 2 B Tick the correct answer., , The continent of North America is linked to South America by, A. an Isthmus, , B. a Strait, , C. a Canal, , Answer:, , The Isthmus of Panama is the narrow strip of land that links the continent, of North America to the continent of South America. It separates Atlantic, Ocean from Pacific Ocean., , Q. 2 C Tick the correct answer., , The major constituent of atmosphere by per cent is, A. Nitrogen, , B. Oxygen, , C. Carbon dioxide, , Answer:
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The major constituent of atmosphere by per cent is Nitrogen. Atmosphere, contains approximately 78 per cent Nitrogen. Nitrogen is essential as it, helps the living organisms to grow., , Q. 2 D Tick the correct answer., , The domain of the earth consisting of solid rocks is, A. the Atmosphere, , B. the Hydrosphere, , C. the Lithosphere, , Answer:, , The solid rocks as well as the soil constitute the Lithosphere. The, Lithosphere is made up of earth’s crust and the different layers of the soil., , Q. 2 E Tick the correct answer., Which is the largest continent?, A. Africa, , B. Asia, , C. Australia, , Answer:, , the continent of Asia is the largest contingent on the Earth. Out of the total, area of land on the surface of the Earth, it occupies around one third area.
