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The Origin and Evolution of the Earth — Syllabus

CBSE · Class 11 · Geography

What The Origin and Evolution of the Earth covers in CBSE Class 11 Geography: 4 topics, for the 2026-27 session.

76 questions64 flashcards5 concepts

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4 Topics · CBSE Class 11 Geography · 2026-27

Topics in The Origin and Evolution of the Earth

1

Early theories of the origin of the Earth

  • Immanuel Kant gave one of the earlier and popular arguments about the origin of the Earth.
  • Laplace revised Kant’s argument in 1796; this revised idea is called the Nebular Hypothesis.
  • The Nebular Hypothesis says that planets formed from a cloud of material around a youthful, slowly rotating sun.
2

Modern theory of the origin of the universe

  • The most popular argument regarding the origin of the universe is the Big Bang Theory.
  • Big Bang Theory is also called the expanding universe hypothesis.
  • Edwin Hubble provided evidence in 1920 that the universe is expanding.
3

Stars, galaxies, and light year

  • A galaxy contains a large number of stars.
  • Galaxies spread over vast distances measured in thousands of light-years.
  • The diameters of individual galaxies range from 80,000 to 150,000 light years.
4

Formation of planets

  • The stars are localised lumps of gas within a nebula.
  • Gravitational force within these lumps leads to the formation of a core to the gas cloud and a huge rotating disc of gas and dust develops around it.
  • The gas cloud starts getting condensed in the next stage.

Key Concepts

Central concept: Origin and evolution of the Earth from early theories to atmospheric, lithospheric, hydrospheric, and biological development

Early theories of origin of the EarthOrigin of the universeScale of the universeFormation of planetsEvolution of the EarthEvolution of lithosphereEvolution of atmosphere and hydrosphereOrigin of life

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Frequently Asked Questions

What are the important topics in The Origin and Evolution of the Earth for CBSE Class 11 Geography?
Key topics in The Origin and Evolution of the Earth include Early theories of the origin of the Earth, Modern theory of the origin of the universe, Stars, galaxies, and light year, Formation of planets. Study these first, then practise questions on each for Class 11 exams.
How should I revise The Origin and Evolution of the Earth for Class 11 exams?
Learn the core ideas first, then work through the 76 practice questions on The Origin and Evolution 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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