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 correct reason for considering lakes an important part of the drainage system?MediumLevel 38What is the main basis for calling Chilika Lake a coastal lagoon?MediumLevel 38Which river feature plays the main role in the formation of an oxbow lake?MediumLevel 38What is the most suitable geographical reason for high salinity in Sambhar Lake?MediumLevel 38Wular Lake's origin is associated with which type of geographical activity?MediumLevel 38If silt is rapidly accumulating in a lake what can be its long-term effect?MediumLevel 38The phumdis of Loktak Lake are an example of what?MediumLevel 38Which geographical context is most useful while studying Vembanad Lake?MediumLevel 38The contribution of lakes in flood control is based on which principle?MediumLevel 38In which condition is a lake's salinity more likely to increase?MediumLevel 38Which lake is counted among the important coastal lakes of India's eastern coast?MediumLevel 38Excess nutrients in lakes increase the possibility of which problem?MediumLevel 38Why do lakes have a moderating effect on local climate?MediumLevel 38Which clue is correct for understanding the location of Kolleru Lake?MediumLevel 38If deforestation increases in a lake's catchment area what effect can it have on the lake?MediumLevel 38Why can lagoon lakes have saline or brackish water?MediumLevel 38Why is the ecological importance of lakes high?MediumLevel 38Which is the correct combination for remembering Wular Lake's location and origin?MediumLevel 38What type of problem is caused by the entry of industrial waste into lakes?MediumLevel 38Seasonal change in a lake's water level is most affected by what?MediumLevel 38