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Subjects

Geography

Lakes

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.

Expert · Level 1 · 25 questions

TOPIC PRACTICE

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  1. When water outflow does not reach the sea
  2. When water always flows directly into the ocean
  3. When the lake is made only of clouds
  4. When it has no sediment
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  1. Permanent presence of glaciers
  2. Sea connection and freshwater inflow from rivers
  3. Sand accumulation in a desert
  4. Complete stability of the crust
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  1. The river directly becomes a sea
  2. A glacier fills the whole valley
  3. The meander neck is cut and the old bend is separated
  4. A sand dune lifts the lake upward
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  1. Continuous snowfall and low temperature
  2. High river outflow and low evaporation
  3. Daily direct entry of the sea
  4. High evaporation and remaining salts
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  1. Crustal movements formed a depression that could hold water
  2. Sea waves formed a lake in the desert
  3. Wind changed a river into a mountain
  4. Humans formed the lake by a modern dam
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  1. Water level will fall and salinity may increase
  2. Water level will always rise
  3. The lake will immediately become a glacier
  4. The river source will change into sea
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  1. The lake always becomes deeper
  2. Siltation increases and reduces lake capacity
  3. Lake water goes into space
  4. Sea temperature becomes zero
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  1. Nutrients decrease then oxygen increases
  2. Glaciers grow then the lake freezes
  3. Nutrients rise then algae grow and oxygen may fall
  4. Sand blows then the sea dries
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  1. Because they are made fully of stone
  2. Because they are desert sand dunes
  3. Because they are permanent glacial blocks
  4. Because they are dynamic floating habitats of vegetation organic matter and water
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  1. It partly separates the water body from the sea
  2. It raises the Himalayas
  3. It immediately removes all salts
  4. It makes the lake underground
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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
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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
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  1. Sambhar Lake
  2. Pulicat Lake
  3. Kolleru Lake
  4. Dal Lake
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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
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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
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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
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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
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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
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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
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  1. Loktak Rajasthan salt production
  2. Sambhar Manipur phumdis
  3. Dal Kerala backwater
  4. Wular Jammu and Kashmir tectonic origin
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  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
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  1. Very high salinity and pollution level
  2. Water being clean
  3. Good recharge
  4. Presence of sediment control
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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
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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
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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

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