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  • Crust - Education | National Geographic Society
    Dynamic geologic forces created Earth’s crust, and the crust continues to be shaped by the planet’s movement and energy Today, tectonic activity is responsible for the formation (and destruction) of crustal materials Earth’s crust is divided into two types: oceanic crust and continental crust
  • crust - media. nationalgeographic. org
    “Crust” describes the outermost shell of a terrestrial planet Our planet’s thin, 40-kilometer (25-mile) deep crust—just 1% of Earth’s mass—contains all known life in the universe Earth has three layers: the crust, the mantle, and the core The crust is made of solid rocks and minerals Beneath the crust
  • Plate Tectonics - National Geographic Society
    The Earth’s crust is broken up into a series of massive sections called plates These tectonic plates rest upon the convecting mantle, which causes them to move The movements of these plates can account for noticeable geologic events such as earthquakes, volcanic eruptions, and more subtle yet sublime events, like the building of mountains
  • Fossil Fuels - National Geographic Society
    Fossil fuels are made from decomposing plants and animals These fuels are found in Earth’s crust and contain carbon and hydrogen, which can be burned for energy Coal, oil, and natural gas are examples of fossil fuels Coal is a material usually found in sedimentary rock deposits where rock and dead plant and animal matter are piled up in
  • Earth - Education | National Geographic Society
    The structure of the earth is divided into four major components: the crust, the mantle, the outer core, and the inner core Each layer has a unique chemical composition, physical state, and can impact life on Earth's surface
  • Core
    Earth’s core is the very hot, very dense center of our planet The ball-shaped core lies beneath the cool, brittle crust and the mostly solid mantle The core is found about 2,900 kilometers (1,802 miles) below Earth’s surface, and has a radius of about 3,485 kilometers (2,165 miles)
  • Mantle - Education | National Geographic Society
    The mantle is the mostly solid bulk of Earth's interior The mantle lies between Earth's dense, super-heated core and its thin outer layer, the crust The mantle is about 2,900 kilometers (1,802 miles) thick, and makes up a whopping 84 percent of Earth’s total volume
  • Earth - Education | National Geographic Society
    Earth’s crust is the planet’s thinnest layer, accounting for just one percent of Earth’s mass There are two kinds of crust: thin, dense oceanic crust and thick, less-dense continental crust Oceanic crust extends about five to 10 kilometers (three to six miles) beneath the ocean floor Continental crust is about 35 to 70 kilometers (22
  • Formation of Earth - National Geographic Society
    Earth’s early atmosphere was most likely composed of hydrogen and helium As the planet changed, and the crust began to form, volcanic eruptions occurred frequently These volcanoes pumped water vapor, ammonia, and carbon dioxide into the atmosphere around Earth
  • Plate Tectonics - National Geographic Society
    In plate tectonics, Earth’s outermost layer, or lithosphere —made up of the crust and upper mantle—is broken into large rocky plates These plates lie on top of a partially molten layer of rock called the asthenosphere





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