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How are the convectional currents in the mantle initiated and maintained?
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What are the evidences in support of the continental drift theory?
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What were the major post-drift discoveries that rejuvenated the interest of scientists in the study of distribution of oceans and continents?
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In which of the following stages of landform development, downward cutting is dominated?
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A deep valley characterised by steep step-like side slopes is known as ____________.
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What do incised meanders in rocks and meanders in plains of alluvium indicate?
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Running water is by far the most dominating geomorphic agent in shaping the earth’s surface in humid as well as in arid climates. Explain.
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Which one of the following gases constitutes the major portion of the atmosphere?
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Sea salt, pollen, ash, smoke soot, fine soil – these are associated with:
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Oxygen gas is in negligible quantity at the height of atmosphere:
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Which one of the following gases is transparent to incoming solar radiation and opaque to outgoing terrestrial radiation?
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Describe the composition of atmosphere.
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Describe the composition of the atmosphere.
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Make correct pairs from the following two columns.
| Column I | Column II |
| (i) Insolation | (a) The difference between the mean temperature of the warmest and the coldest months |
| (ii) Albedo | (b) The lines joining the places of equal temperature |
| (iii) Isotherm | (c) The incoming solar radiation |
| (iv) Annual range | (d) The percentage of visible light reflected by an object |
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In India, why is the day temperature maximum in May and why not after the summer solstice?
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How do the latitude and the tilt in the axis of rotation of the earth affect the amount of radiation received at the earth’s surface?
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Where do waves in the ocean get their energy from?
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Which one of the following processes is responsible for transforming liquid into vapour?
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Which one of the following is the highest cloud in the sky?
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