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  2. List of unsolved problems in chemistry - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    This article needs attention from an expert in chemistry. ... "First 25 of 125 big questions that face scientific inquiry over the next quarter-century".

  3. The cells in the human body are not outnumbered 10 to 1 by microorganisms. The 10 to 1 ratio was an estimate made in 1972; current estimates put the ratio at either 3 to 1 or 1.3 to 1. [300] The total length of capillaries in the human body is not 100,000 km.

  4. Know Nothing - Wikipedia

    en.wikipedia.org/wiki/Know_Nothing

    The American Party, known as the Native American Party before 1855 [a] and colloquially referred to as the Know Nothings, or the Know Nothing Party, was an Old Stock nativist political movement in the United States in the 1850s. Members of the movement were required to say "I know nothing" whenever they were asked about its specifics by ...

  5. Test validity - Wikipedia

    en.wikipedia.org/wiki/Test_validity

    Test validity is the extent to which a test (such as a chemical, physical, or scholastic test) accurately measures what it is supposed to measure.In the fields of psychological testing and educational testing, "validity refers to the degree to which evidence and theory support the interpretations of test scores entailed by proposed uses of tests". [1]

  6. Probability - Wikipedia

    en.wikipedia.org/wiki/Probability

    Physicists face the same situation in the kinetic theory of gases, where the system, while deterministic in principle, is so complex (with the number of molecules typically the order of magnitude of the Avogadro constant 6.02 × 10 23) that only a statistical description of its properties is feasible.

  7. Laboratory Life - Wikipedia

    en.wikipedia.org/wiki/Laboratory_Life

    Laboratory Life: The Social Construction of Scientific Facts is a 1979 book by sociologists of science Bruno Latour and Steve Woolgar.. This influential book in the field of science studies presents an anthropological study of Roger Guillemin's scientific laboratory at the Salk Institute.

  8. Multiple choice - Wikipedia

    en.wikipedia.org/wiki/Multiple_choice

    A multiple choice question, with days of the week as potential answers. Multiple choice (MC), [1] objective response or MCQ(for multiple choice question) is a form of an objective assessment in which respondents are asked to select only the correct answer from the choices offered as a list.

  9. Science in the Age of Enlightenment - Wikipedia

    en.wikipedia.org/wiki/Science_in_the_Age_of...

    The chemical revolution was a period in the 18th century marked by significant advancements in the theory and practice of chemistry. Despite the maturity of most of the sciences during the scientific revolution, by the mid-18th century chemistry had yet to outline a systematic framework or theoretical doctrine.