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Subjects

Geography

Mapping of the ocean floor

महासागर तल का मानचित्रण

In this Class 11 Geography topic from “Distribution of Oceans and Continents,” students learn how the ocean floor is mapped and interpreted. They explore major features such as continental shelves, slopes, deep-sea plains, mid-ocean ridges, trenches and seamounts, and understand how soundings, sonar and bathymetric maps reveal underwater relief. The topic also helps connect ocean-floor patterns with plate boundaries, seafloor spreading and the changing distribution of continents and oceans.

TOPIC PRACTICE

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

25 questions

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Medium · Level 4
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  1. Marine deposition and geological history
  2. School timetable
  3. Road traffic signs
  4. Wildlife census
Medium · Level 4
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  1. Different depths and floor features support different communities
  2. All organisms live only in air
  3. Floor features have no relation with organisms
  4. The ocean floor is always the same
Medium · Level 4
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  1. It shows the changing floor shape better
  2. It makes the ocean smaller
  3. It makes weather stable
  4. It makes fish disappear
Medium · Level 4
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  1. Monsoon rainfall theory
  2. Plate tectonic theory
  3. Demographic transition theory
  4. Agricultural location theory
Medium · Level 4
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  1. According to the map key
  2. According to imagination
  3. Only from coast direction
  4. From fish number
Medium · Level 4
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  1. Safe navigation and marine construction
  2. Classroom attendance
  3. Language writing style
  4. Colour of plant flowers
Medium · Level 4
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  1. Sonar can give faster and continuous measurement
  2. Sonar works only on land
  3. Weighted line is faster than satellite
  4. Sonar does not measure depth
Medium · Level 4
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  1. Where depth increases quickly after the shelf
  2. Where depth does not change at all
  3. Where only city names are shown
  4. Where the sea surface is dry
Medium · Level 4
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  1. Direct observation and sample collection
  2. Only cloud drawing
  3. Only changing wind direction
  4. Only counting coastal sand
Medium · Level 4
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  1. It helps identify active and inactive rises
  2. It measures rainfall
  3. It stops river velocity
  4. It changes soil crops
Medium · Level 4
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  1. Trench then ridge
  2. Shelf then continental slope
  3. Abyssal plain then river valley
  4. Island then desert
Medium · Level 4
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  1. Because rocky sandy or muddy bottoms change use and risk
  2. Because depth has no importance
  3. Because all bottoms are identical
  4. Because the sea floor is invisible so it does not exist
Medium · Level 4
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  1. Island
  2. Seamount
  3. Lagoon
  4. Delta
Medium · Level 4
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  1. Because depth calculation depends on it
  2. Because sea colour depends on it
  3. Because wind direction depends on it
  4. Because coast length decreases by it
Medium · Level 4
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  1. Shelf is shallow near coast while abyssal plain is flat in deep sea
  2. Both are always on mountain tops
  3. Both form only in rivers
  4. Abyssal plain lies above the coast
Medium · Level 4
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  1. It better shows the form and risks of the whole area
  2. It explains only one word
  3. It removes ocean water
  4. It makes a map without data
Medium · Level 4
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  1. It shows that varied landforms exist beneath them
  2. It proves oceans are deserts
  3. It shows there is no sea floor
  4. It shows only coastal cities
Medium · Level 4
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  1. Continental shelf
  2. Oceanic trench
  3. Coastal lagoon
  4. Coral reef
Medium · Level 4
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  1. Because sediments accumulate there and make the gradient gentler
  2. Because there is no water there
  3. Because it is in the sky
  4. Because it is at a river source
Medium · Level 4
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  1. Abyssal plain
  2. Oceanic trench
  3. Coral lagoon
  4. Continental shelf
Medium · Level 4
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  1. Identifying important habitats and sensitive bottom areas
  2. Only building roads on the coast
  3. Changing sea colour
  4. Removing weather forecasts
Medium · Level 4
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  1. By observing depth change with distance
  2. Only by smelling the sea
  3. From fish colours
  4. From the name of the coast
Medium · Level 4
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  1. Sea-floor spreading
  2. Soil erosion
  3. Meander formation
  4. Urbanisation
Medium · Level 4
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  1. It is not only depth numbers but a basis for understanding relief resources safety and tectonics
  2. It is only a method to show sea colour
  3. It is only a fishing method
  4. It is not related to geography
Medium · Level 4
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  1. Due to change in wave colour
  2. Due to local variation in gravitational attraction
  3. Due to drying of seawater
  4. Due to higher number of fishes

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