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Subjects

Geography

Lakes

झीलें

In Class 9 Geography, the topic “Lakes” explains how these water bodies form part of the drainage system and differ from rivers in their shape, movement, and location. Students learn about natural lakes formed by tectonic activity, glaciers, river courses, and coastal processes, as well as human-made reservoirs. Indian examples such as Wular, Dal, Sambhar, Chilika, and Kolleru help connect ideas with maps and landscapes. The topic also examines how lakes store water, support irrigation, hydropower, fisheries, biodiversity, tourism, and flood regulation.

Practice questions

What is the most scientific reason for rising salinity in a saline lake formed in a closed drainage basin?HardLevel 40What will be the most direct effect on a lake if soil erosion increases in its catchment area?HardLevel 40Under which condition is an oxbow lake most likely to form?HardLevel 40What is the main basis for placing Chilika and Pulicat lakes in the same category?HardLevel 40What does the presence of phumdis in Loktak Lake indicate?HardLevel 40Which combination is most correct while studying Wular Lake?HardLevel 40Why is Gobind Sagar Lake placed among artificial lakes?HardLevel 40Which option correctly explains the special origin of Lonar Lake?HardLevel 40What can be the clearest result of eutrophication in lakes?HardLevel 40Why can encroachment on lake shores reduce flood control capacity?HardLevel 40Kolleru Lake's geographical location is best understood through what?HardLevel 40Which geographical clue is most useful for understanding Vembanad Lake?HardLevel 40Why is a mixture of saline and fresh water possible in coastal lagoons?HardLevel 40What will be the most serious ecological effect of excessive water withdrawal from lakes?HardLevel 40Which is the correct geographical description of Nainital Lake?HardLevel 40Why is the moderating effect of lakes on local climate understood?HardLevel 40What can be a negative effect of uncontrolled tourism around lakes?HardLevel 40Why can limited aquatic plants be useful but excessive plants harmful in lakes?HardLevel 40Why is wastewater treatment very necessary in lake conservation?HardLevel 40Why do oxbow lakes have a horseshoe like shape?HardLevel 40

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