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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 2 · 25 questions

TOPIC PRACTICE

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Up to 25 questions from this page. Select your focus, then start.

25 questions

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  1. Because roots stop holding the soil
  2. Because the Sun falls into the river
  3. Because the colour of water changes
  4. Because the river immediately becomes a lake
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  1. Deltas and coasts may receive less new sediment
  2. The coast will always rise
  3. The sea will become completely fresh
  4. Fish will start living in air
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  1. When human settlements and property suffer major damage
  2. When only sediment is deposited
  3. When the river has clean water
  4. When banks have vegetation
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  1. Balance of water use river health and downstream needs
  2. Stopping all water upstream
  3. Increasing pollution
  4. Completely filling river banks
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  1. Because polluted water harms fish habitats, breeding and survival
  2. Because fish can survive only in desert regions
  3. Because water quality has no relation to fish populations or health
  4. Because clean water drives fish out of a river
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  1. Erosion and valley formation
  2. Deposition and mountain building
  3. Evaporation and delta formation
  4. Condensation and meander erosion
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  1. When flow energy decreases
  2. When slope is very high
  3. When the river is a fast mountain stream
  4. When there is no sediment at all
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  1. When persistent toxic substances enter the food chain
  2. When only clean rainwater enters
  3. When bank vegetation remains protected
  4. When wastewater is fully treated
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  1. Sediment may get trapped behind the dam
  2. A dam never affects sediment
  3. A dam stops the sea
  4. A dam turns air into soil
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  1. Considering water use pollution control flood safety and ecology together
  2. Only withdrawing more water
  3. Only dumping waste into the river
  4. Only increasing encroachment on banks
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  1. Downstream water use and aquatic life
  2. Revolution of the Sun
  3. Height of the Himalayas
  4. Size of the Moon
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  1. Water and transport are available but pollution and flood risk also increase
  2. Rivers always destroy cities
  3. Water is not available along rivers
  4. Cities have no relation with rivers
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  1. To consider flood erosion and water quality risks
  2. To completely stop the river
  3. To always make soil poisonous
  4. To keep crops away from water
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  1. Many regions and users benefit from the same river
  2. River water belongs to only one person
  3. River water has no use
  4. River water is always unlimited
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  1. Irrigation water availability can change by season
  2. Irrigation always happens without water
  3. Floods occur in every season
  4. Rivers never connect with fields
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  1. For aquatic ecology and downstream needs
  2. To keep the river always dry
  3. To stop all sediment
  4. To turn the river into desert
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  1. When waste management and crowd control are absent
  2. When the river is kept clean
  3. When environmental rules are applied
  4. When the number of boats is controlled
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  1. Soil fertility and agricultural production
  2. Formation of the Moon
  3. Formation of glaciers in desert
  4. Turning the sea into rock
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  1. Drinking water crisis fishery loss and irrigation risk
  2. Decrease in Sun temperature
  3. Disappearance of mountains
  4. Sea becoming fresh
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  1. Sediment runoff and siltation can decrease
  2. The river dries immediately
  3. River water always becomes saline
  4. All organisms disappear
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  1. Because erosion deposition uses and risks change in different parts
  2. Because a river remains same everywhere
  3. Because mouth is not different from source
  4. Because a river only changes name
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  1. Irrigation and water quality risk
  2. Navigation and solar eclipse
  3. Hydropower and Moon formation
  4. Fisheries and mountain height
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  1. Rivers are linked with water resources landform formation livelihood culture and ecology
  2. Rivers only bring floods
  3. Rivers only provide hydropower
  4. Rivers are unrelated to human life
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  1. Waste treatment regulated water use riparian green belt and floodplain protection
  2. Releasing all waste into the river
  3. Increasing encroachment on floodplains
  4. Completely stopping river flow
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  1. Strong vertical erosion
  2. Slow lateral erosion
  3. Deposition by sea waves
  4. Sand deposition by wind

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