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 A detailed survey of the ocean floor directly helps in which task?

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Answer and explanation

Mapping of the ocean floor

Practice questions

01 A detailed survey of the ocean floor directly helps in which task?

02 Why is ocean floor mapping useful for safe ship routes?

03 Ocean floor mapping is more closely linked with oil and gas exploration in which area?

04 In maps showing ocean depth with colours, what does a darker colour generally indicate?

05 Why is the map key important while reading an ocean floor map?

06 What may a deep valley-like erosional feature on the sea floor be called?

07 Ridges and trenches found on the ocean floor show what?

08 In ocean floor mapping, where is the sound-wave sending equipment generally installed?

09 What can an ocean floor map prepared from depth measurements be called?

10 What is the main difference between continental shelf and continental slope?

11 Ocean floor information helps in which scientific exploration?

12 How can very deep parts of the ocean floor be shown on a map?

13 What is a long elevated belt on the ocean floor called?

14 How does ocean floor mapping change older guess-based knowledge?

15 Why was measuring ocean depth not easy earlier?

16 Why is ocean floor information useful for coastal countries?

17 Which of the following is most related to depth measurement?

18 What is the benefit of showing ocean floor relief like land relief?

19 Which feature is most likely to have the greatest ocean depth?

20 Why is a plain on the ocean floor considered different from a land plain?

21 What may closely spaced isobaths on an ocean floor map indicate?

22 What do widely spaced isobaths on an ocean floor map show?

23 Ocean floor mapping gives us information about which part of Earth?

24 Why is ocean floor mapping important in school geography?

25 Which statement about ocean floor mapping is correct?

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