Q8 B of 49 Page 120

HOTS

Underground water is more common in limestone areas than surface water. Why?


In regions rich in limestone, the erosive actions of the underground water with the limestone may result in the development of karst regions. The underground water is the major reason for the formation of the karst topography. It is formed due to the dissolution of limestone, dolomite and gypsum with the groundwater. It is created because of the gradation, erosion and deposition of these soluble rocks with the groundwater. Thus the surface run-off is much lesser in the regions.


More from this chapter

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7

Consider the following statements and choose the right option given below:

Statement. Limestone regions have less underground water.


Reason. Water does not percolate through limestone.


a. The statement is right reason is wrong.


b. The statement is wrong reason is right.


c. The statement and reason are wrong.


d. The statement and reason are right.


 8 A

HOTS

Is wind the only gradient agent in the desert?


 8

HOTS

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


 9

Map skill

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


i. Any two deltas


ii. A karst region


iii. Any two hot and cold deserts


iv. An area of continental glaciers