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Chapter 3 of 22
Flashcards

Hydrosphere

Kerala Board · Class 9 · Social Science

Flashcards for Hydrosphere — Kerala Board Class 9 Social Science. Quick Q&A cards covering key concepts, definitions, and formulas.

44 questions20 flashcards5 concepts
20 Flashcards
Card 1Hydrological Cycle

What is the hydrological cycle and what is its equation?

Answer

The hydrological cycle is the circulation of water in different forms (liquid, solid, gaseous) between oceans, atmosphere, land surface, and living organisms. The equation is RF = RO + ET, where RF (R

Card 2Hydrological Cycle

What are the six stages of the water cycle?

Answer

The six stages are: 1) Evaporation - water changes from liquid to gas, 2) Transportation - movement of water vapor through atmosphere, 3) Condensation - water vapor forms droplets and clouds, 4) Preci

Card 3Hydrological Cycle

Evaporation

Answer

The process by which water changes from liquid to gas due to the Sun's heat. Water from land, lakes, rivers, and oceans evaporates into water vapor. Plants also lose water through transpiration.

Card 4Water Distribution

What percentage of Earth's water is fresh water and where is most of it found?

Answer

Only 2.78% of Earth's water is fresh water. Most fresh water (69.56%) is frozen in ice caps, glaciers, and permanent snow in Antarctica, Arctic, and mountains. 30.1% exists as groundwater, and only 0.

Card 5Oceans

Name the five oceans of the world in order of size.

Answer

From largest to smallest: 1) Pacific Ocean (separates Asia/Oceania from Americas), 2) Atlantic Ocean (separates Americas from Europe/Africa), 3) Indian Ocean (washes Southern Asia, separates Africa an

Card 6Ocean Relief

What is the Continental Shelf and why is it important?

Answer

The Continental Shelf extends to 200 meters depth and covers 7.6% of ocean area. It's the border zone between land and sea. Important because: 1) Rich in fish wealth, 2) Contains crude oil and natural

Card 7Ocean Relief

Compare Continental Shelf and Continental Slope.

Answer

Continental Shelf: 0-200m depth, 7.6% of ocean area, border between land and sea, rich in resources. Continental Slope: 200-3000m depth, 15% of ocean area, complex relief with submarine canyons, marks

Card 8Ocean Relief

What are the deepest ocean trenches in each ocean?

Answer

Pacific Ocean: Challenger/Mariana Trench (11,022 m deep), Atlantic Ocean: Puerto Rico/Naves Trench (10,475 m deep), Indian Ocean: Java Trench (7,450 m deep). These are narrow trenches that plunge to g

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Frequently Asked Questions

What are the important topics in Hydrosphere for Kerala Board Class 9 Social Science?

Hydrosphere covers several key topics that are frequently asked in Kerala Board Class 9 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.

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.

There are 20 flashcards for Hydrosphere covering key definitions, formulas, and concepts. Use them daily for 10–15 minutes for best results.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.