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Chapter 23 of 33
Chapter Summary

Temperature, Salinity and Density of Ocean Water

ICSE · Class 11 · Geography

Summary of Temperature, Salinity and Density of Ocean Water for ICSE Class 11 Geography. Key concepts, important points, and chapter overview.

65 questions38 flashcards5 concepts

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Overview

Ocean water is not uniform. Its temperature, salinity, and density vary from place to place and from surface to depth. These three properties control ocean circulation, climate, marine life, and the movement of water masses. Temperature is highest near the equator and lowest near the poles. Salinity

Key Concepts

Ocean water receives heat from

Ocean water receives heat from the sun. Heating occurs by absorption of heat radiation from the sun and by convection of heat through the ocean bottom

Ocean water is hottest at

Ocean water is hottest at the equator and coldest at the poles. The average annual temperature is 26°C at the equator, falling to 23°C at 20°, 14°C at

Warm currents raise ocean temperature

Warm currents raise ocean temperature and cold currents lower it. The Cold Labrador Current causes freezing near 50°N on the western coast of the Nort

Ice floes are drifting broken ice

Ice floes are drifting broken ice-fields that form when frozen Arctic or Antarctic margins break away in summer. They are different from icebergs, whi

Ocean temperature is highest at

Ocean temperature is highest at the surface and decreases with depth. Up to about 100 metres, temperature is almost the same as at the surface. It fal

Learning Objectives

  • Understand how ocean water is heated and cooled
  • Explain why ocean temperature changes horizontally and vertically
  • Describe the factors that affect salinity in ocean water
  • Compare salinity in open seas, partially closed seas, and enclosed water bodies
  • Define density and explain the factors that control it in ocean water

Frequently Asked Questions

What are the important topics in Temperature, Salinity and Density of Ocean Water for ICSE Class 11 Geography?
Temperature, Salinity and Density of Ocean Water covers several key topics that are frequently asked in ICSE 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 Temperature, Salinity and Density of Ocean Water — ICSE Class 11 Geography?
Understand the core concepts first, then work through the 65 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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