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2. Formation of the Earth

The Earth was formed approximately 4.6 billion years ago from cosmic dust and gas through processes including planetary accretion. This chapter explores theories of Earth's formation, the structure of its layers, major geological time periods, and the cooling and differentiation of the Earth. Additionally, it discusses the formation of continents and oceans, as well as the ongoing geological processes that continue to shape the planet today.

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Sections

  • 2

    Formation Of The Earth

    The Earth was formed approximately 4.6 billion years ago through planetary accretion from cosmic dust and gas.

    Learning Practice

  • 2.1

    Introduction To The Formation Of The Earth

    Earth was formed around 4.6 billion years ago through a process of planetary accretion from cosmic dust and gas.

    Learning Practice

  • 2.2

    Theories Of Earth’s Formation

    The section explains the primary theories behind Earth's formation, including the Nebular Hypothesis, Planetary Accretion Hypothesis, and the Impact Hypothesis.

    Learning Practice

  • 2.3

    Layers Of The Earth

    This section covers the structure of the Earth's interior, detailing the properties of the crust, mantle, and core.

    Learning Practice

  • 2.4

    Geological Time Scale And Earth’s Evolution

    The geological time scale categorizes Earth's history into eons, eras, and periods based on significant events in geological and biological history.

    Learning Practice

  • 2.5

    The Cooling And Differentiation Of The Earth

    This section discusses how the early Earth cooled to form a solid crust and how differentiation led to the formation of its layered structure.

    Learning Practice

  • 2.6

    Formation Of Continents And Oceans

    This section details how the processes of plate tectonics, continental drift, and ocean formation contribute to the Earth's geological landscape.

    Learning Practice

  • 2.7

    Theories On The Earth’s Formation

    This section discusses the two main theories regarding the formation of the Earth: the Big Bang Theory and the Solar Nebula Hypothesis.

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  • 2.8

    Conclusion

    The Earth formed from cosmic materials over 4.6 billion years, evolving through cooling and differentiation into distinct layers, with ongoing geological processes shaping its surface.

    Learning Practice

References

g11-2.pdf

Class Notes

Memorization

What we have learnt

  • The Earth formed from dust ...
  • Different theories explain ...
  • The geological time scale p...

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