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Concept Maps

Formation of the Earth — Concept Maps

ICSE · Class 11 · Geography

4 concept maps of Formation of the Earth for ICSE Class 11 Geography, each also written out as a text outline.

65 questions35 flashcards2 formulas & key relations5 concepts

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4 Concept Maps

Chapter Overview: Formation of the Earth

Chapter Overview: Formation of the Earth

The map in words

  • Formation of the Earth
    • Age of the Earth
      • Tidal Force
        • Moon recession 13cm per year
        • Age 4 billion years
      • Sedimentation
        • Thickness divided by annual rate
        • Age 4 billion years
      • Rate of Erosion
        • Denudation of landmasses
        • Not very accurate
      • Salinity of Ocean
        • Joly 1899
        • Age 120 million years
        • Least accurate
      • Radioactivity
        • Most reliable method
        • Uranium half life 4.56 billion years
        • Age 4 to 5 billion years
    • Origin of the Earth
      • Nebular Group
        • Kant 1755
          • Cold particles
          • Angular velocity
        • Laplace 1796
          • Hot nebula
          • Ring separation
      • Encounter Group
        • Chamberlin and Moulton 1904
          • Planetesimals
          • Companion star
        • Jeans and Jaffreys 1919
          • Tidal hypothesis
          • Cigar shaped tongues
      • Modern Theories
        • Alfven 1942
          • Electromagnetic force
          • Ionised dust disc
        • Otto Schmidt 1943
          • Interstellar dust
          • Flat disc formation
        • Big Bang Theory
          • 15 billion years ago
          • Singularity explosion
          • COBE validated 1972

Timeline of Major Hypotheses on the Origin of the Earth

Timeline of Major Hypotheses on the Origin of the Earth

The map in words

  • 1755
    • Kant Gaseous Mass Hypothesis
  • 1796
    • Laplace Nebular Hypothesis
  • 1899
    • Joly Salinity Method
  • 1903
    • Curie Radioactivity Discovery
  • 1904
    • Chamberlin and Moulton Planetesimal Hypothesis
  • 1919
    • Jeans Tidal Hypothesis
  • 1920
    • Hubble Universe Expanding
  • 1929
    • Jeffreys Modifies Tidal Hypothesis
  • 1942
    • Alfven Electromagnetic Theory
  • 1943
    • Schmidt Interstellar Dust Hypothesis
  • 1960
    • Big Bang Theory Postulated
  • 1972
    • COBE Validates Big Bang Theory

Timeline of Hypotheses on Origin of Earth

Timeline of Hypotheses on Origin of Earth

The map in words

  • 1755
    • Kant - Gaseous Mass Hypothesis
  • 1796
    • Laplace - Nebular Hypothesis
  • 1899
    • Joly - Salinity Method
  • 1903
    • Curie - Radioactivity Discovery
  • 1904
    • Chamberlin and Moulton - Planetesimal Hypothesis
  • 1919
    • Jeans - Tidal Hypothesis
  • 1929
    • Jeffreys - Modified Tidal Hypothesis
  • 1942
    • Alfven - Electromagnetic Theory
  • 1943
    • Otto Schmidt - Inter-Stellar Dust Hypothesis
  • 1950s
    • Big Bang Theory Postulated
  • 1972
    • COBE validates Big Bang Theory

Formation of the Earth: age and origin

Formation of the Earth: age and origin

The map in words

  • Formation of the Earth: age and origin
    • Age of the Earth
    • Tidal Force Method
    • Sedimentation Method
    • Rate of Erosion Method
    • Salinity of the Ocean Method
    • Radioactivity Method
    • Origin of the Earth
    • Gaseous Mass Hypothesis of Kant

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Frequently Asked Questions

What are the important topics in Formation of the Earth for ICSE Class 11 Geography?
Key topics in Formation of the Earth include Age of the Earth, Tidal Force Method, Methods Based on Rocks and Oceans, Radioactivity Method. Study these first, then practise questions on each for Class 11 exams.
What do the concept maps for Formation of the Earth show?
The 4 maps show how the ideas in Formation of the Earth connect: Chapter Overview: Formation of the Earth; Timeline of Major Hypotheses on the Origin of the Earth. Each map is also written out as an outline on this page.
How should I revise Formation of the Earth for Class 11 exams?
Learn the core ideas first, then work through the 65 practice questions on Formation of the Earth. 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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All ICSE Class 11 Geography Concept Maps

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