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Chapter 3 of 12
Revision Notes

Exogenetic Processes Part-1

Maharashtra Board · Class 9 · Geography

Quick revision notes for Exogenetic Processes Part-1 — Maharashtra Board Class 9 Geography. Key concepts, formulas, and definitions for last-minute revision.

44 questions22 flashcards5 concepts

Key Topics to Revise

1

Classification of Landforms

  • Primary and secondary landforms: Formed by internal movements (continents, mountains, plateaus, plains)
  • Tertiary landforms: Formed by external processes (valleys, sand dunes, delta, U-shaped valleys)
  • External processes continuously modify existing landforms through weathering, erosion, transportation, and deposition
2

Mechanical (Physical) Weathering

  • Dominant in arid climates with high diurnal temperature range
  • Rocks break down physically without chemical change in composition
  • Five main causes: temperature changes, frost action, crystal growth, pressure release, water action
3

Chemical Weathering

  • More effective in humid climates with high rainfall
  • Water acts as universal solvent and plays crucial role
  • Three main types: carbonation, solution, and oxidation
4

Biological Weathering

  • Caused by living organisms including plants and animals
  • Plant roots create pressure in rock cracks as they grow
  • Tree roots commonly seen growing on fort walls and monuments

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Full Notes

Key Concepts

External processes occurring on Earth's surfaceThe natural breaking down or weakeningPhysical breakdown of rocks without changingBreakdown of rocks through chemical reactionsRock breakdown caused by living organisms

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Frequently Asked Questions

What are the important topics in Exogenetic Processes Part-1 for Maharashtra Board Class 9 Geography?

Exogenetic Processes Part-1 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.

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.

Sources & Official References

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