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  2. 108 “Are You Smarter Than A 5th Grader?” Questions ... - AOL

    www.aol.com/108-smarter-5th-grader-questions...

    Hosted by comedian Jeff Foxworthy, the original show asked adult contestants to answer questions typically found in elementary school quizzes with the help of actual fifth-graders as teammates ...

  3. Quizlet - Wikipedia

    en.wikipedia.org/wiki/Quizlet

    Quizlet was founded in 2005 by Andrew Sutherland as a studying tool to aid in memorization for his French class, which he claimed to have "aced". [6] [7] [8] Quizlet's blog, written mostly by Andrew in the earlier days of the company, claims it had reached 50,000 registered users in 252 days online. [9]

  4. McGraw Hill Education - Wikipedia

    en.wikipedia.org/wiki/McGraw_Hill_Education

    McGraw-Hill took full ownership of the venture in 1993. In 2004, The McGraw-Hill Companies sold its children's publishing unit to School Specialty. [15] In 2007, The McGraw-Hill Companies launched an online student study network, GradeGuru.com. This offering gave McGraw-Hill an opportunity to connect directly with its end users, the students.

  5. Mineral (nutrient) - Wikipedia

    en.wikipedia.org/wiki/Mineral_(nutrient)

    In the context of nutrition, a mineral is a chemical element. Some "minerals" are essential for life, but most are not. [ 1 ] [ 2 ] [ 3 ] Minerals are one of the four groups of essential nutrients; the others are vitamins , essential fatty acids , and essential amino acids . [ 4 ]

  6. Native element mineral - Wikipedia

    en.wikipedia.org/wiki/Native_element_mineral

    Native element minerals are those elements that occur in nature in uncombined form with a distinct mineral structure. The elemental class includes metals, intermetallic compounds, alloys, metalloids, and nonmetals. The Nickel–Strunz classification system also includes the naturally occurring phosphides, silicides, nitrides, carbides, and ...

  7. Rock (geology) - Wikipedia

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

    The original rock, known as the protolith, transforms into other mineral types or other forms of the same minerals, by recrystallization. [5] The temperatures and pressures required for this process are always higher than those found at the Earth's surface: temperatures greater than 150 to 200 °C and pressures greater than 1500 bars. [ 18 ]

  8. Mineral - Wikipedia

    en.wikipedia.org/wiki/Mineral

    Mineral classification schemes and their definitions are evolving to match recent advances in mineral science. Recent changes have included the addition of an organic class, in both the new Dana and the Strunz classification schemes. [152] [153] The organic class includes a very rare group of minerals with hydrocarbons. The IMA Commission on ...

  9. List of minerals - Wikipedia

    en.wikipedia.org/wiki/List_of_minerals

    This is a list of minerals which have ... Farncomb Hill, Breckenridge Mining ... Use Q12110334 for a particular class or grouping of minerals ...