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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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Hard · Level 38 · inland drainage,closed basin,lakes
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  1. When its water does not reach the sea
  2. When it always joins the sea
  3. When it is formed only by a glacier
  4. When it contains no water
Hard · Level 38 · salinity,evaporation,sambhar lake
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  1. Expansion of glaciers
  2. Evaporation being greater than outflow
  3. Sea waves climbing mountains
  4. River always flowing backward
Hard · Level 38 · wular lake,tectonic depression,kashmir
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  1. It formed only from a river bend
  2. It formed by sea waves
  3. It developed in a depression formed by crustal movements
  4. It was made only by constructing a dam
Hard · Level 38 · lagoon,brackish water,coastal lake
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  1. Fully glacial water
  2. Fully underground water
  3. Always distilled water
  4. Brackish water
Hard · Level 38 · oxbow lake,meander cut off,river erosion
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  1. Growth of a meander then cut-off and formation of an isolated water body
  2. Mountain uplift then volcanic eruption
  3. Sea drying then desert formation
  4. Glacier directly becoming salt
Hard · Level 38 · catchment,deforestation,siltation
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  1. Because trees turn soil into air
  2. Because soil erosion increases and sediment reaches the lake
  3. Because rainfall always ends
  4. Because the lake immediately becomes a glacier
Hard · Level 38 · siltation,storage capacity,lake depth
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  1. Water storage will always increase
  2. Salinity will immediately become zero
  3. Depth and storage capacity will decrease
  4. The lake will turn into a sea
Hard · Level 38 · coastal lake,sea connection,salinity
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  1. River source will immediately change
  2. Height of the Himalayas will decrease
  3. No water will remain in the lake
  4. Salinity and outflow of water will change
Hard · Level 38 · chilika,biodiversity,wetland
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  1. As a coastal lagoon it provides many aquatic and bird habitats
  2. It is completely dry sandy land
  3. It is only volcanic ash
  4. It is part of a Himalayan glacier
Hard · Level 38 · eutrophication,nutrient pollution,algae
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  1. Because mountains rise rapidly
  2. Because excessive algal growth can reduce oxygen in water
  3. Because the sea freezes completely
  4. Because lake water becomes stone
Hard · Level 38 · loktak,phumdi,aquatic habitat
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  1. Salt formation by sea waves
  2. Valley cutting by glacier
  3. Formation of floating mixed habitat of vegetation organic matter and water
  4. Rapid expansion of sand dunes
Hard · Level 38 · lake degradation,water withdrawal,encroachment
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  1. Due to normal seasonal evaporation
  2. Due to natural glacier movement
  3. Due to natural sea tide
  4. Due to excessive water withdrawal and encroachment
Hard · Level 38 · sambhar lake,rajasthan,salt production
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  1. Sambhar Lake
  2. Dal Lake
  3. Vembanad Lake
  4. Kolleru Lake
Hard · Level 38 · green buffer,lake conservation,runoff
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  1. It immediately turns the lake into a sea
  2. It can reduce soil erosion and pollutant runoff
  3. It removes all fish
  4. It always makes water saline
Hard · Level 38 · glacial lake,outburst flood,himalayas
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  1. Because they never contain water
  2. Because they are made only of sand
  3. Because water can rush out if the natural barrier breaks
  4. Because they are always connected to the sea
Hard · Level 38 · dissolved oxygen,aquatic life,water quality
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  1. The lake will immediately become deeper
  2. All salts will disappear
  3. Earthquakes will stop
  4. Fish and aquatic organisms will be at risk
Hard · Level 38 · vembanad,kerala backwaters,coastal system
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  1. Kerala backwaters and coastal water system
  2. Thar Desert and salt plain
  3. Kashmir Valley and tectonic depression
  4. Manipur and floating phumdis
Hard · Level 38 · meander neck,oxbow lake,river process
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  1. Narrowing and cutting off of the meander neck
  2. Sudden formation of the Himalayas
  3. Freezing of sea tides
  4. Reverse blowing of desert wind
Hard · Level 38 · local climate,heat capacity,lakes
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  1. Colour of sand
  2. Heat holding capacity of water
  3. Brightness of rocks
  4. Height of mountains
Hard · Level 38 · coastal lake,inland lake,saline lake
View options
  1. Both always form from glaciers
  2. A coastal lake may connect with sea while an inland saline lake may occur in a closed basin
  3. Both never contain water
  4. An inland lake is always a backwater

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