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Hydrosphere

Gujarat Board · Class 11 · Geography

Complete topic list for Hydrosphere in Gujarat Board Class 11 Geography. Key concepts, sub-topics, and what to focus on for board exams.

40 questions25 flashcards5 concepts

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4 Topics · Gujarat Board Class 11 Geography

Topics in Hydrosphere

1

Water Cycle (Hydrological Cycle)

  • Water exists in three forms on Earth: solid (ice), liquid (water), and gas (water vapor)
  • Solar heat causes evaporation from seas, lakes, and rivers, forming clouds
  • Condensation occurs under favorable conditions, leading to precipitation
2

Relief Features of Ocean Floor

  • Ocean floor has four main relief features: Continental Shelf, Continental Slope, Abyssal Plains, and Deep Sea Trenches
  • Continental Shelf extends up to 200 meters depth and covers 8% of ocean floor
  • Average width of continental shelf is 65 km with average depth of 130 meters
3

Temperature of Sea Water

  • Average surface temperature of ocean water is 17°C
  • Pacific Ocean: 19°C, Indian Ocean: 17°C, Atlantic Ocean: 16.9°C
  • Sunrays cannot penetrate below 200 meters, so surface is warmer
4

Salinity of Ocean Water

  • Average salinity of sea water is 35‰ (35 grams of salt per 1000 grams of water)
  • Salinity measured in ‰ (per thousand) units
  • Higher in tropical regions due to more evaporation

Key Concepts

The continuous process where ocean waterFour major featuresAverage surface temperature is 17°C globallyAverage salinity is 35‰ (35 gramsSystematic rise and fall of sea

Frequently Asked Questions

What are the important topics in Hydrosphere for Gujarat Board Class 11 Geography?
Hydrosphere covers several key topics that are frequently asked in Gujarat 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 Hydrosphere — Gujarat Board Class 11 Geography?
Understand the core concepts first, then work through the 40 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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All 17 chapters — Gujarat Board Class 11 Geography Syllabus

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