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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.

TOPIC PRACTICE

Quiz this set

Up to 20 questions from this page. Select your focus, then start.

20 questions

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Expert · Level 38 · closed outlet,salinity,stagnation
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  1. Salinity will fall to zero
  2. Salinity and water stagnation may increase
  3. The lake will immediately become a river
  4. Every pollutant will disappear
Expert · Level 38 · glacial lake,outburst flood,moraine
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  1. Weakening of moraine or natural barrier
  2. Increase of coastal sand
  3. End of desert salt
  4. Colour change of sea fish
Expert · Level 38 · kolleru,freshwater,delta region
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  1. Sambhar Lake
  2. Pulicat Lake
  3. Kolleru Lake
  4. Dal Lake
Expert · Level 38 · dissolved oxygen,water quality,aquatic life
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  1. It directly tells mountain height
  2. It stops sea waves
  3. It makes every lake saline
  4. It is linked with survival of aquatic organisms
Expert · Level 38 · biomagnification,toxic pollutants,food chain
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  1. When persistent toxic pollutants enter the food chain
  2. When only clean rainwater enters
  3. When shore vegetation is protected
  4. When wastewater is fully treated
Expert · Level 38 · vembanad,backwater,kerala
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  1. A coastal water system with still water and marine influence
  2. A completely Himalayan glacier
  3. A sandy lake of the Thar Desert
  4. A dry crustal crater
Expert · Level 38 · thermal stratification,deep lake,temperature
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  1. In a shallow dry lake
  2. In a deep and relatively calm lake
  3. In blowing desert sand
  4. In a roadside drain
Expert · Level 38 · lagoon mouth,water exchange,salinity
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  1. Water exchange will reduce and salinity balance may change
  2. Glaciers will grow and cover the lake
  3. All birds will immediately become mountains
  4. Lake water will become distilled water
Expert · Level 38 · encroachment,flood risk,lake capacity
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  1. Because the lake's capacity to hold excess water decreases
  2. Because mountains automatically become higher
  3. Because sea level becomes zero
  4. Because cloud formation stops
Expert · Level 38 · wular,state feature,tectonic
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  1. Loktak Rajasthan salt production
  2. Sambhar Manipur phumdis
  3. Dal Kerala backwater
  4. Wular Jammu and Kashmir tectonic origin
Expert · Level 38 · water hyacinth,invasive species,oxygen
View options
  1. It can cover the surface and reduce light and oxygen availability
  2. It permanently removes all pollutants
  3. It immediately turns the lake into a sea
  4. It always keeps salinity zero
Expert · Level 38 · irrigation,salinity,pollution
View options
  1. Very high salinity and pollution level
  2. Water being clean
  3. Good recharge
  4. Presence of sediment control
Expert · Level 38 · sustainable use,water withdrawal,lake ecology
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  1. So that water level and ecological balance remain safe
  2. So that the lake dries immediately
  3. So that all organisms disappear
  4. So that salinity always increases
Expert · Level 38 · self purification,pollution load,carrying capacity
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  1. When pollution load exceeds the lake's tolerance capacity
  2. When clean water flow continues
  3. When the shore green belt remains protected
  4. When wastewater is treated
Expert · Level 38 · coastal lake,inland saline lake,evaporation
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  1. Both are formed only by glaciers
  2. A coastal lake can be influenced by the sea while an inland saline lake is influenced by closed drainage and evaporation
  3. Neither ever contains water
  4. An inland lake is always famous for houseboats
Expert · Level 38 · water level,water balance,human use
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  1. Only by lake name
  2. Only by option length
  3. Through inflow outflow evaporation recharge and human use
  4. Only by ocean depth
Expert · Level 38 · groundwater recharge,infiltration,lake bed
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  1. When the bed and surrounding land allow infiltration
  2. When the bed is completely impermeable and dry
  3. When there is no water
  4. When all drains are polluted
Expert · Level 38 · wetland conservation,birds,biodiversity
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  1. Providing habitat to aquatic birds and biodiversity
  2. Every lake remaining completely dry
  3. Salinity always being zero
  4. Disappearance of all rivers
Expert · Level 38 · pulicat,eastern coast,lagoon
View options
  1. Eastern coast coastal lagoon and brackish water
  2. Kashmir tectonic lake and freshwater
  3. Rajasthan closed basin and salt production
  4. Manipur phumdis and floating habitat
Expert · Level 38 · sedimentation,nutrient pollution,algal growth
View options
  1. The lake will become deeper and cleaner
  2. The lake will become shallow and algal growth may increase
  3. Every salt will disappear
  4. The lake will become a mountain peak

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