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  2. Continental crust - Wikipedia

    en.wikipedia.org/wiki/Continental_crust

    The thickness of Earth's crust (km). The continental crust consists of various layers, with a bulk composition that is intermediate (SiO 2 wt% = 60.6). [5] The average density of the continental crust is about, 2.83 g/cm 3 (0.102 lb/cu in), [6] less dense than the ultramafic material that makes up the mantle, which has a density of around 3.3 g/cm 3 (0.12 lb/cu in).

  3. Crust (geology) - Wikipedia

    en.wikipedia.org/wiki/Crust_(geology)

    The internal structure of Earth. In geology, the crust is the outermost solid shell of a planet, dwarf planet, or natural satellite.It is usually distinguished from the underlying mantle by its chemical makeup; however, in the case of icy satellites, it may be defined based on its phase (solid crust vs. liquid mantle).

  4. Sumatra PDF - Wikipedia

    en.wikipedia.org/wiki/Sumatra_PDF

    Sumatra PDF is a free and open-source document viewer that supports many document formats including: Portable Document Format (PDF), Microsoft Compiled HTML Help (CHM), DjVu, EPUB, FictionBook (FB2), MOBI, PRC, Open XML Paper Specification (OpenXPS, OXPS, XPS), and Comic Book Archive file (CB7, CBR, CBT, CBZ). [3]

  5. Environmental Health

    images.huffingtonpost.com/2009-01-27-1476069x82.pdf

    Background Chlorine and caustic soda are produced at chlor-alkali plants using mercury cells or the increasingly popular membrane technology that is mercury free and more energy-

  6. Plate tectonics - Wikipedia

    en.wikipedia.org/wiki/Plate_tectonics

    Plate tectonics (from Latin tectonicus, from Ancient Greek τεκτονικός (tektonikós) ' pertaining to building ') [1] is the scientific theory that the Earth's lithosphere comprises a number of large tectonic plates, which have been slowly moving since 3–4 billion years ago.

  7. Superior Craton - Wikipedia

    en.wikipedia.org/wiki/Superior_Craton

    The Superior Craton is a stable crustal block covering Quebec, Ontario, and southeast Manitoba in Canada, and northern Minnesota in the United States.It is the biggest craton among those formed during the Archean period. [1]

  8. California ‘Teacher of the Year’ sobs as she admits to ...

    www.aol.com/news/california-teacher-sobs-she...

    An award-winning California teacher broke down in tears in court as she confessed to sexually abusing two of her students, ages 11 and 12. Jacqueline Ma, who was named “Teacher of the Year” in ...

  9. Al-Karak - Wikipedia

    en.wikipedia.org/wiki/Al-Karak

    Al-Karak has been inhabited since at least the Iron Age, and was an important city for the Moabites.In the Bible it is called Kir-haresh, Kir-hareseth or Kir of Moab, and is identified as having been subject to the Neo-Assyrian Empire; in the Books of Kings (2 Kings 16:9) and Book of Amos (Amos 1:5, 9:7), it is mentioned as the place where the Arameans went before they settled in the regions ...