• LEARN ABOUT THE STRUCTURE AND COMPOSITION OF THE EARTH
    PHYSICAL GEOGRAPHY

    LEARN ABOUT THE STRUCTURE AND COMPOSITION OF THE EARTH

    Isaac Newton was one of the first scientists to theorize about the structure of Earth. Based on his studies of the force of gravity, Newton calculated the average density of Earth and found it to be more than twice the density of the rocks near the surface. From these results, Newton realized that the interior of Earth had to be much denser than the surface rocks. His findings excluded the possibility of a cavernous, fiery underworld inhabited by the dead, but still left many questions unanswered. Soon after the Earth formed, unique processes occurred – division into metallic core, silicate mantle and crust – which, along with surface water, made…

  • LEARN ABOUT OUR SOLAR SYSTEM
    PHYSICAL GEOGRAPHY

    LEARN ABOUT OUR SOLAR SYSTEM

    The solar system we call home is located in an outer spiral arm of the vast Milky Way galaxy. The Universe is a very big place, and we occupy a very small corner of it. Known as the Solar System, our stomping grounds are not only a tiny fraction of the Universe as we know it, but is also a very small part of our galactic neighborhood (aka. the Milky Way Galaxy). When it comes right down to it, our world is just a drop of water in an endless cosmic sea. The solar system consists of a central star, the Sun, and all of the smaller celestial bodies that…

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