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Revision Notes

Water (Oceans)

CBSE · Class 11 · Geography

Quick revision notes for Water (Oceans) — CBSE Class 11 Geography. Key concepts, formulas, and definitions for last-minute revision.

67 questions80 flashcards5 concepts

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Key Topics to Revise

1

1. Water on Earth and the Hydrological Cycle

  • Water is a cyclic resource and can be used and re-used.
  • The hydrological cycle is the continuous movement of water on, in, and above the earth.
  • It includes exchange among oceans, atmosphere, land surface, subsurface, and living organisms.
2

2. Relief of the Ocean Floor

  • The ocean floor is not flat; it has major divisions and minor relief features.
  • The ocean floors can be divided into four major divisions: Continental Shelf, Continental Slope, Deep Sea Plain, and Oceanic Deeps.
  • Other relief features include ridges, hills, sea mounts, guyots, trenches, and canyons.
3

3. Continental Shelf, Slope, and Deep Sea Plain

  • The continental shelf is the extended margin of the continent and is the shallowest part of the ocean floor.
  • Its average gradient is 1° or even less.
  • The average width of continental shelves is about 80 km.
4

4. Oceanic Deeps, Ridges, Seamounts, Canyons, Guyots, and Atolls

  • Oceanic deeps or trenches are the deepest parts of the oceans.
  • They are steep-sided and narrow basins.
  • They are 3-5 km deeper than the surrounding ocean floor.

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Full Notes

Key Concepts

The hydrological cycle is the continuousAbout 91% of planetary waterThe ocean floor has four majorThe continental shelf is the shallowestThe continental slope connects the shelf

Frequently Asked Questions

What are the important topics in Water (Oceans) for CBSE Class 11 Geography?
Water (Oceans) covers several key topics that are frequently asked in CBSE Class 11 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Water (Oceans) — CBSE Class 11 Geography?
Understand the core concepts first, then work through the 67 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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