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
Under which condition can lake water become less useful for agriculture?HardLevel 38Which lake-feature match is correct?HardLevel 38What is the simple meaning of thermal stratification in lakes?HardLevel 38How can deterioration of lake water quality be related to human health?HardLevel 38In which situation can a lake's natural purification system weaken?HardLevel 38What is the main benefit of soil conservation in a lake catchment?HardLevel 38Which balance is most suitable for understanding changes in lake water level?HardLevel 38If biodiversity is declining in a lake what should be checked first?HardLevel 38What is the most balanced meaning of sustainable use of lakes?HardLevel 38Which conclusion best explains the multidimensional geographical importance of lakes?HardLevel 38Under which condition does a lake act like a natural regulator in a drainage system?HardLevel 39What is the main basis for considering Sambhar Lake an inland saline lake?HardLevel 39Which process is most necessary for the formation of an oxbow lake?HardLevel 39Why is Chilika Lake called a lagoon rather than an ordinary freshwater lake?HardLevel 39Which option correctly gives the water type and location of Wular Lake?HardLevel 39Which result is most likely when siltation increases in a lake?HardLevel 39The presence of phumdis in Loktak Lake shows which feature?HardLevel 39Why is Gobind Sagar Lake considered an artificial reservoir rather than a natural lake?HardLevel 39Why can a coastal lagoon contain a mixture of saline and fresh water?HardLevel 39What is the correct geographical classification of Pulicat Lake?HardLevel 39