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  2. Models of scientific inquiry - Wikipedia

    en.wikipedia.org/wiki/Models_of_scientific_inquiry

    A theory is a hypothesis that has survived many tests and seems to be consistent with other established scientific theories. Since a theory is a promoted hypothesis, it is of the same 'logical' species and shares the same logical limitations. Just as a hypothesis cannot be proven but can be disproved, that same is true for a theory.

  3. Brønsted–Lowry acid–base theory - Wikipedia

    en.wikipedia.org/wiki/Brønsted–Lowry_acid...

    In the same year that Brønsted and Lowry published their theory, G. N. Lewis created an alternative theory of acid–base reactions. The Lewis theory is based on electronic structure . A Lewis base is a compound that can give an electron pair to a Lewis acid , a compound that can accept an electron pair.

  4. Scientific law - Wikipedia

    en.wikipedia.org/wiki/Scientific_law

    Scientific laws or laws of science are statements, based on repeated experiments or observations, that describe or predict a range of natural phenomena. [1] The term law has diverse usage in many cases (approximate, accurate, broad, or narrow) across all fields of natural science ( physics , chemistry , astronomy , geoscience , biology ).

  5. Prout's hypothesis - Wikipedia

    en.wikipedia.org/wiki/Prout's_hypothesis

    Prout's hypothesis was an early 19th-century attempt to explain the existence of the various chemical elements through a hypothesis regarding the internal structure of the atom. In 1815 [ 1 ] and 1816, [ 2 ] the English chemist William Prout published two papers in which he observed that the atomic weights that had been measured for the ...

  6. Hypothesis - Wikipedia

    en.wikipedia.org/wiki/Hypothesis

    The hypothesis of Andreas Cellarius, showing the planetary motions in eccentric and epicyclical orbits. A hypothesis (pl.: hypotheses) is a proposed explanation for a phenomenon. A scientific hypothesis must be based on observations and make a testable and reproducible prediction about reality, in a process beginning with an educated guess or ...

  7. Scientific theory - Wikipedia

    en.wikipedia.org/wiki/Scientific_theory

    A scientific theory differs from a scientific fact or scientific law in that a theory seeks to explain "why" or "how", whereas a fact is a simple, basic observation and a law is an empirical description of a relationship between facts and/or other laws. For example, Newton's Law of Gravity is a mathematical equation that can be used to predict ...

  8. Autism May Be Caused by Air Pollution — Specifically, Car ...

    www.aol.com/lifestyle/autism-may-caused-air...

    A new study says that air pollution — specifically, the kind caused by car exhaust — may be a significant cause of rising rates of autism in children. Exposure to nitric oxide (NO)— which is ...

  9. Avogadro's law - Wikipedia

    en.wikipedia.org/wiki/Avogadro's_Law

    Avogadro's hypothesis (as it was known originally) was formulated in the same spirit of earlier empirical gas laws like Boyle's law (1662), Charles's law (1787) and Gay-Lussac's law (1808). The hypothesis was first published by Amedeo Avogadro in 1811, [4] and it reconciled Dalton atomic theory with the "incompatible" idea of Joseph Louis Gay ...