Chapter 18 of 18
Revision Notes
Natural Regions of the World — Revision Notes
ICSE · Class 9 · Geography
Natural Regions of the World revision notes for ICSE Class 9 Geography: 4 topics in quick points. Part of the ICSE Class 9 Geography syllabus.
63 questions46 flashcards5 concepts
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Key Topics to Revise
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1. Core Ideas: Climate and Climatic Regions
- Climate means the average weather conditions of temperature and rainfall over a long period, around 30 years.
- A climatic region is an area with broadly similar climatic conditions.
- Climatic boundaries are always transitional, not fixed.
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2. Equatorial Region
- Also called Tropical Wet Climate or Tropical Rainforest Climate.
- Found along the Equator from 5°N to 5°S.
- Typical features occur between 2° and 8°N, while the rain belt swings between 10°N and 10°S.
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3. Tropical Grasslands or Savanna or Sudan Climate
- A transitional climatic type found between equatorial forests and tropical deserts.
- Most Savanna lands lie between 10° and 20°N and S.
- Rainfall varies from 25 cm to 150 cm and is usually unreliable.
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4. Tropical Deserts
- Most hot deserts lie within 15°N to 30°N and south, on western continental margins under the permanent trade wind belt.
- The Sahara desert is the only exception to this rule.
- The highest diurnal temperature range among climatic types is found here, with a highest recorded value of 41.7°C.
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Full NotesKey Concepts
Climate means the average weather conditionsClimatic boundaries are never fixedThis climatic type lies alongAlso called Savanna or Sudan ClimateHot deserts lie mostly between 15°N
Frequently Asked Questions
What are the important topics in Natural Regions of the World for ICSE Class 9 Geography?
Key topics in Natural Regions of the World include Core Ideas: Climate and Climatic Regions, Equatorial Region, Tropical Grasslands or Savanna or Sudan Climate, Tropical Deserts. Study these first, then practise questions on each for Class 9 exams.
How should I revise Natural Regions of the World for Class 9 exams?
Learn the core ideas first, then work through the 63 practice questions on Natural Regions of the World. Revise 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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