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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.

Hard · Level 1 · 25 questions

TOPIC PRACTICE

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25 questions

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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
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  1. Expansion of glaciers
  2. Evaporation being greater than outflow
  3. Sea waves climbing mountains
  4. River always flowing backward
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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
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  1. Fully glacial water
  2. Fully underground water
  3. Always distilled water
  4. Brackish water
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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
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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
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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
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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
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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
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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
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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
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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
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  1. Sambhar Lake
  2. Dal Lake
  3. Vembanad Lake
  4. Kolleru Lake
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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
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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
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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
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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
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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
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  1. Colour of sand
  2. Heat holding capacity of water
  3. Brightness of rocks
  4. Height of mountains
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  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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  1. Lake name state and main feature
  2. Only option length
  3. Only river depth
  4. Only mountain age
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  1. It is a freshwater lake between the Krishna and Godavari deltas
  2. It is a saline lake of Rajasthan
  3. It is a backwater lake of Kerala
  4. It is a tectonic lake of Kashmir
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  1. Reduction of natural area and flood absorption capacity
  2. Immediate conversion of lake into ocean
  3. Water always increasing
  4. All pollutants disappearing
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  1. Sambhar and houseboats
  2. Dal and Srinagar tourism
  3. Loktak and salt of Rajasthan
  4. Vembanad and glacial barrier
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  1. It always forms from the sea
  2. It forms only from glaciers
  3. It can form artificially from water stored by a dam
  4. It forms from desert wind

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