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Subjects

Geography

Role of Rivers

In Class 9 Geography, this topic from the chapter “Drainage” explains how rivers shape the land through erosion, transportation and deposition. Students learn how river systems and drainage patterns influence plains, valleys, agriculture, settlements, transport and the availability of water. The topic also highlights the importance of rivers in human life, along with challenges such as pollution, floods and the need for careful conservation and management of river resources.

Hard · Level 1 · 25 questions

TOPIC PRACTICE

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25 questions

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  1. Because a river valley provides water fertile soil transport and trade together
  2. Because a river valley has no water
  3. Because a river valley remains only ice covered
  4. Because a river valley never creates settlements
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  1. Steep slope and rapid erosion
  2. Low slope and sediment deposition
  3. Complete dryness and no sediment
  4. Sea waves reaching mountains
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  1. Because they are made only of stones
  2. Because rivers never reach there
  3. Because floods deposit sediment but can also cause waterlogging and damage
  4. Because they are always under the sea
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  1. Water availability downstream will increase
  2. The river will immediately become a sea
  3. Pollution will automatically end
  4. Downstream flow and ecology may weaken
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  1. Greater slope increases vertical erosion
  2. Low slope increases deposition
  3. Sea tide cuts the valley
  4. The river becomes a still lake there
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  1. Very high sediment and calm sea
  2. Strong sea currents remove sediments
  3. River speed becomes zero at the mouth
  4. Deposition is very high at the mouth
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  1. Only the name of the river
  2. Only the state boundary
  3. Only the number of fish
  4. Depth flow obstacles and seasonal water volume
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  1. Polluted irrigation water can harm soil and crops
  2. All crops will grow without water
  3. Soil will always become more fertile
  4. River water will immediately become pure
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  1. It completely dries the river
  2. It stabilizes banks and reduces the impact of flow
  3. It always increases sediment
  4. It makes the river saline
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  1. They remove all water from the main river
  2. They end the drainage area
  3. They increase water sediment and drainage area
  4. They turn the river into a mountain
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  1. They create closed walls everywhere
  2. They exist only in the sea
  3. They form only by volcanoes
  4. They provide relatively gentler routes and settlement links
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  1. Sharing a limited water resource among many regions
  2. Rivers always having no water
  3. All states being surrounded by sea
  4. River flowing in the sky
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  1. Because water depth habitat and oxygen conditions may change
  2. Because fish always live in air
  3. Because the river becomes rock
  4. Because pollution always ends
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  1. Obstruction to flood spread and increase in damage
  2. Complete purification of the river
  3. Permanent end of sediment
  4. Permanent end of floods
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  1. Because mining always blocks the Sun
  2. Because uncontrolled mining can destabilize the river bed and banks
  3. Because sand is never useful in construction
  4. Because gravel turns water into fire
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  1. Because industries use water and can also create pollution risk
  2. Because industries do not need water
  3. Because rivers are unrelated to industries
  4. Because pollution is always beneficial
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  1. Dumping waste directly into the river
  2. Increasing water use and reducing treatment
  3. Wastewater treatment and recycling
  4. Unplanned construction on river banks
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  1. When the river bed is fully sealed with concrete
  2. When the river has no water
  3. When every bank is encroached
  4. When the river bed and nearby soil allow seepage
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  1. Rivers also play roles in erosion deposition transport energy livelihood and ecology
  2. Rivers are never useful in irrigation
  3. Rivers have no water
  4. Rivers exist only in pictures
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  1. Sediment and water from the upper course reach downstream
  2. The upper course has no relation with downstream
  3. The upper course is always sea
  4. The upper course sends only air
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  1. It supports aquatic life sediment transport and downstream needs
  2. It immediately makes the river saline
  3. It floods all cities
  4. It always stops farming
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  1. They only cause harm
  2. They only give benefits
  3. They provide water storage and power but can alter flow and sediment
  4. They send the river into the sky
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  1. When water is clean and treated
  2. When water is polluted and untreated
  3. When water source is protected
  4. When water quality is tested
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  1. Because lack of cleanliness in cultural activities can increase pollution
  2. Because culture has no relation with rivers
  3. Because worship always dries rivers
  4. Because a river is only an industrial object
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  1. Alluvial soil water and flat land are available there
  2. Only rock and ice are found there
  3. The river never brings water there
  4. Settlement is permanently banned there

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