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Revision Notes

The Properties of Sea Water

Maharashtra Board · Class 9 · Geography

Quick revision notes for The Properties of Sea Water — Maharashtra Board Class 9 Geography. Key concepts, formulas, and definitions for last-minute revision.

44 questions20 flashcards3 concepts

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Key Topics to Revise

1

Temperature of Seawater

  • Surface temperature of seawater is not uniform everywhere and depends on various factors
  • Latitudinally, temperature decreases from equatorial areas (25°C) to poles (2°C)
  • Mid-latitude average temperature is around 16°C
2

Salinity of Seawater

  • Salinity increases buoyancy of seawater, useful for water transport
  • High salinity beyond limits destroys marine life
  • Salinity is high where evaporation rate exceeds freshwater supply
3

Density of Seawater

  • Density is controlled by temperature and salinity
  • Lower temperature increases density (cold water is denser)
  • Higher salinity increases density (saline water is denser)
4

Special Case Study - Dead Sea

  • Located on Israel-Jordan border with salinity of 332‰
  • Average ocean salinity is only 35‰
  • Only River Jordan supplies freshwater

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Full Notes

Key Concepts

Sea water temperature decreases from equatorSalinity is the amount of dissolvedDensity of sea water is controlled

Frequently Asked Questions

What are the important topics in The Properties of Sea Water for Maharashtra Board Class 9 Geography?
The Properties of Sea Water covers several key topics that are frequently asked in Maharashtra Board Class 9 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in The Properties of Sea Water — Maharashtra Board Class 9 Geography?
Understand the core concepts first, then work through the 44 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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