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Revision Notes

Water (Oceans)

Uttar Pradesh Board · Class 11 · Geography

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

63 questions22 flashcards5 concepts

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Key Topics to Revise

1

Hydrological Cycle and Water Distribution

  • Water is a cyclic resource that undergoes continuous movement between oceans, atmosphere, and land
  • 71% of planetary water is found in oceans; remaining is freshwater in glaciers, groundwater, lakes, etc.
  • 59% of water falling on land returns to atmosphere through evaporation
2

Ocean Basins and Classification

  • Five major oceans: Pacific, Atlantic, Indian, Southern (Antarctic), and Arctic
  • Oceans merge naturally, making demarcation difficult
  • Ocean floor lies 3-6 km below sea level on average
3

Ocean Floor Relief Features

  • Four major divisions: Continental Shelf, Continental Slope, Deep Sea Plains, Oceanic Deeps
  • Continental Shelf: Shallowest part, average gradient 1° or less, average width 80 km
  • Continental Slope: Connects shelf to ocean basin, gradient 2-5°, depth 200-3000m
4

Ocean Temperature Distribution

  • Factors affecting temperature: Latitude, land-water distribution, winds, ocean currents
  • Temperature decreases from equator to poles (0.5°C per latitude)
  • Average surface temperature: 27°C, decreasing with depth

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Full Notes

Key Concepts

The continuous circulation of water betweenFour major divisionsTemperature decreases from equator to polesTotal dissolved salt content in seawaterThermocline is the boundary layer (100

Frequently Asked Questions

What are the important topics in Water (Oceans) for Uttar Pradesh Board Class 11 Geography?
Water (Oceans) covers several key topics that are frequently asked in Uttar Pradesh Board 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) — Uttar Pradesh Board Class 11 Geography?
Start by understanding all key concepts. Practise previous year questions from this chapter. Revise formulas and definitions regularly. Use flashcards for quick revision 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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