• MORE DETAILS ABOUT THE OUTER AND INTERNAL STRUCTURE OF THE EARTH
    PHYSICAL GEOGRAPHY

    MORE DETAILS ABOUT THE OUTER AND INTERNAL STRUCTURE OF THE EARTH

    The structure of the earth is grouped into two zones. These are the outer structure and the internal structure.   THE OUTER STRUCTURE OF THE EARTH The outer structure of the earth is made up of four zones or layers. These zones or layers are: Lithosphere. Hydrosphere. Atmosphere. Biosphere.   LITHOSPHERE (CHARACTERISTICS) The lithosphere is the solid portion of the earth. It is the outermost layer or zone of the earth crust. It is made up of rocks and mineral materials. It represents 30% of the earth surface. It forms the land mass which is about 10-50km thick. The outermost layer of the land mass is made up of loose…

  • THE ORIGIN OF THE UNIVERSE
    PHYSICAL GEOGRAPHY

    THE ORIGIN OF THE UNIVERSE

    “Cosmos” is just another word for universe, and “cosmology” is the study of the origin, evolution and fate of the universe. Some of the best minds in history – both philosophers and scientists – have applied themselves to an understanding of just what the universe is and where it came from, suggesting in the process a bewildering variety of theories and ideas, from the Cosmic Egg to the Big Bang and beyond. The most popular theory of our universe’s origin centers on a cosmic cataclysm unmatched in all of history—the big bang. This theory was born of the observation that other galaxies are moving away from our own at great…

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