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.

Practice questions

01 Which statement about bathymetry is correct in ocean floor mapping?

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Answer and explanation

Mapping of the ocean floor

Practice questions

01 Which statement about bathymetry is correct in ocean floor mapping?

02 What mistake can occur if the map legend is ignored in ocean floor mapping?

03 Why can actual depth and mapped depth differ in ocean floor mapping?

04 The study of magnetic stripes on the ocean floor is linked with which larger idea?

05 Mapping of hydrothermal sources on the sea floor is more expected near which feature?

06 Why is equal detail not available for all oceanic areas in ocean floor mapping?

07 What does a negative elevation value on an ocean floor map indicate?

08 Why is studying sea-floor structure important in marine resource exploration?

09 On what basis is identification of marine habitats improved in sea-floor mapping?

10 What is the main thing observed in mapping an oceanic basin?

11 If depth suddenly decreases and a seamount-like rise appears in an area, what may the map indicate?

12 Why is knowledge of coastal depth useful in harbour planning through ocean floor mapping?

13 Which mapped feature can indicate active volcanism on the ocean floor?

14 Why can the correct relief not be known only by looking at the sea surface in ocean floor mapping?

15 How can studying sea-floor shape help in analysing ocean currents?

16 What type of question can be based on a cross section in ocean floor mapping?

17 The sudden transition between coastal shelf and deep basin is linked with which feature in ocean floor mapping?

18 Why can old and new data be compared in ocean floor mapping?

19 Which pair is correctly matched in the study of ocean floor relief?

20 Which information is commonly useful for both resources and conservation in ocean floor mapping?

21 In which situation may an area need more detailed survey in ocean floor mapping?

22 Which is the most suitable interpretation of ocean floor mapping?

23 Which data set can best show sea-floor slope in ocean floor mapping?

24 If a small gravity-related signal is found at the sea surface, what may satellite method estimate?

25 Which main exam skill should a student develop from ocean floor mapping?

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