Q10 A of 49 Page 120

Give geographical terms for the following:

Chemical alteration of carbonate rocks limestone region.


Carbonation

Explanation.


This mainly occurs in carbonate rocks. It is the reaction between the water molecules and the carbon dioxide in the atmosphere resulting in the formation of carbonic acids. The reaction of the carbonic acid with the carbonate rocks decomposes the rocks from within and results in its weathering. It basically occurs in the limestone region in the formation of caves.


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HOTS

The river channels in the lower course are wider than the upper course.


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Map skill

On the given outline map of the world, mark the following.


i. Any two deltas


ii. A karst region


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 10 B

Give geographical terms for the following:

The flat surface near cliffs


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Give geographical terms for the following:

Erosion + Transportation + Deposition