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Water (Oceans) — Revision Notes

CBSE · Class 11 · Geography

Water (Oceans) revision notes for CBSE Class 11 Geography: 4 topics in quick points. Part of the CBSE Class 11 Geography syllabus.

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?
Key topics in Water (Oceans) include Water on Earth and the Hydrological Cycle, Relief of the Ocean Floor, Continental Shelf, Slope, and Deep Sea Plain, Oceanic Deeps, Ridges, Seamounts, Canyons, Guyots, and Atolls. Study these first, then practise questions on each for Class 11 exams.
How should I revise Water (Oceans) for Class 11 exams?
Learn the core ideas first, then work through the 67 practice questions on Water (Oceans). Revise 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.

More resources for Water (Oceans)

All CBSE Class 11 Geography Revision Notes

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