Q. The heavier silicates named as 'Sima' or silica + magnesium are most abundant in the

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Q. The imaginary line on the earth's surface, which closely follows the 180º meridian, is called the

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Q. The largest part of our hydrosphere is

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Q. The limit beyond which the stars suffer internal collapse is called the

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Q. The ground water that occurs when flow of the subterranean water is not confined by the presence of impermeable layers is called

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Q. The gulf that separates Finland and Sweden in Europe is

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Q. The largest continent in the world is

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Q. The landforms that are created by massive earth movements due to plate tectonics are called

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Q. The largest production of mica in Asia is from

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Q. The latitude 'AA' on the map represents the

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Q. The largest fresh water lake of Africa, area wise is

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Q. The important mountains of Europe include

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Q. The last major glacial period began about 2,000,000 years before present and is commonly known as

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Q. The imaginary axis at which the earth rotates remains inclined at an angle of ____ to the plane of earth's orbit.

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Q. The ionosphere contains ionized air that protects the earth from

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Q. The horizontal of soil profile is composed of

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Q. The largest city in Latin America is

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Q. The highest and lowest values of a weather element observed over the entire period of record are

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Q. The highest mountain peak of Oceania is

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Q. The length of the tropical years (the time interval between successive occurrences of the spring equinox) is decreasing very slowly as a result of

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