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
The economic importance of Dal Lake is mainly linked with what?MediumLevel 39Why is stopping wastewater important in lake conservation?MediumLevel 39Kolleru Lake is known for which geographical location?MediumLevel 39Vembanad Lake is most correctly associated with which region?MediumLevel 39The origin of Lonar Lake is considered linked with which special event?MediumLevel 39Why can lagoon lakes contain a mixture of saline and fresh water?MediumLevel 39What increases the problem of eutrophication in lakes?MediumLevel 39Which lake and state match is incorrect?MediumLevel 39How can lakes help in groundwater recharge?MediumLevel 39How is the importance of lakes for ecosystems shown?MediumLevel 39What effect can encroachment along lake shores have?MediumLevel 39How should Nainital Lake be studied?MediumLevel 39Which is the most practical use of freshwater lakes?MediumLevel 39Why does the water level of lakes change seasonally?MediumLevel 39Which lake is linked with a major inland saline water body of India?MediumLevel 39What is the basis for classifying lakes as natural and artificial?MediumLevel 39Which option correctly matches a lake with its special identity?MediumLevel 39How does lake pollution affect aquatic life?MediumLevel 39Under which condition can the economic use of a lake increase?MediumLevel 39What is the basic difference between a lake and a sea?MediumLevel 39